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Coolant Hoses - Engine Bay
By OE Match
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Vehicle Group
- Porsche 996 C2 3.6L 09/01-2005
Information
Coolant return water hose. Porsche 996 3.6L C2 MANUAL
From engine return pipe to main return pipe.
Fits:
Porsche 996 C2 2002-05
6-Speed Manual Transmission
Diagram ref no 3
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610684110
The product you are viewing cross references to these numbers
From engine return pipe to main return pipe.
Fits:
Porsche 996 C2 2002-05
6-Speed Manual Transmission
Diagram ref no 3
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610684110
99610684110
99610684108
99610684104
1614300400
The product you are viewing cross references to these numbers
Price: €30.36
In stock
Vehicle Group
- Porsche 996 C4 3.6L 09/01-2005
Information
Coolant return water hose. RETURN
Fits:
Porsche 996 C4 3.6L 2002>> MANUAL
This product supersedes Porsche's old part numbers:
- 99610688802
- 99610688806
Click 'Zoom in' for large parts diagram.
Diagram ref no 3
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610688808
The product you are viewing cross references to these numbers
Fits:
Porsche 996 C4 3.6L 2002>> MANUAL
This product supersedes Porsche's old part numbers:
- 99610688802
- 99610688806
Click 'Zoom in' for large parts diagram.
Diagram ref no 3
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610688808
99610688808
99610688806
99610688802
The product you are viewing cross references to these numbers
Vehicle Group
- Porsche 996 C4 3.4L 1997-08/01
Information
Coolant supply water hose.
This OE Match coolant supply water hose is a direct-fit replacement hose designed for the Porsche 996 Carrera 4 (1998–2001) with the 3.4L engine. Manufactured to match the original Porsche part in shape, material and durability, this hose ensures reliable coolant flow within the engine’s cooling system.
Fits:
Porsche 996 C4 3.4L 1998 - 2001
Diagram ref no 1
This product supersedes Porsche's old part numbers: 99610674003, 99610674004
This coolant supply hose forms part of the engine cooling system in the Porsche 996. It connects key cooling system components and allows coolant to circulate between the engine and cooling circuit, helping maintain the correct operating temperature.
The OE Match hose replicates the original hose design with the correct bends, diameter and reinforced rubber construction to ensure proper fitment and long-term reliability.
The hose carries coolant through the engine cooling circuit, allowing the radiator and thermostat system to regulate engine temperature. Proper coolant circulation prevents overheating and ensures the engine operates within its designed temperature range.
Replacing old or deteriorated hoses helps maintain efficient cooling system performance and prevents coolant leaks that could lead to engine damage.
Function
• Coolant Circulation: Transfers coolant through the engine cooling system
• Temperature Regulation: Supports stable engine operating temperature
• Leak Prevention: Reinforced rubber construction ensures secure coolant flow
Coolant hoses are exposed to heat, pressure and coolant chemicals over time, which can cause the rubber to harden, crack or weaken. A failing hose may lead to coolant leaks or sudden rupture, potentially resulting in engine overheating. Replacing ageing hoses ensures reliable coolant circulation and protects the engine from temperature-related damage.
Consider replacing the coolant hose if you notice:
• Coolant leaks around hose connections
• Cracked or brittle rubber hose material
• Swelling or soft spots in the hose
• During cooling system servicing or preventative maintenance
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610674006
The product you are viewing cross references to these numbers
This OE Match coolant supply water hose is a direct-fit replacement hose designed for the Porsche 996 Carrera 4 (1998–2001) with the 3.4L engine. Manufactured to match the original Porsche part in shape, material and durability, this hose ensures reliable coolant flow within the engine’s cooling system.
Fits:
Porsche 996 C4 3.4L 1998 - 2001
Diagram ref no 1
This product supersedes Porsche's old part numbers: 99610674003, 99610674004
This coolant supply hose forms part of the engine cooling system in the Porsche 996. It connects key cooling system components and allows coolant to circulate between the engine and cooling circuit, helping maintain the correct operating temperature.
The OE Match hose replicates the original hose design with the correct bends, diameter and reinforced rubber construction to ensure proper fitment and long-term reliability.
The hose carries coolant through the engine cooling circuit, allowing the radiator and thermostat system to regulate engine temperature. Proper coolant circulation prevents overheating and ensures the engine operates within its designed temperature range.
Replacing old or deteriorated hoses helps maintain efficient cooling system performance and prevents coolant leaks that could lead to engine damage.
Function
• Coolant Circulation: Transfers coolant through the engine cooling system
• Temperature Regulation: Supports stable engine operating temperature
• Leak Prevention: Reinforced rubber construction ensures secure coolant flow
Coolant hoses are exposed to heat, pressure and coolant chemicals over time, which can cause the rubber to harden, crack or weaken. A failing hose may lead to coolant leaks or sudden rupture, potentially resulting in engine overheating. Replacing ageing hoses ensures reliable coolant circulation and protects the engine from temperature-related damage.
Consider replacing the coolant hose if you notice:
• Coolant leaks around hose connections
• Cracked or brittle rubber hose material
• Swelling or soft spots in the hose
• During cooling system servicing or preventative maintenance
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610674006
99610674003
99610674004
99610674006
The product you are viewing cross references to these numbers
Price: €35.04
In stock
Vehicle Group
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
Information
Engine coolant hose, Intake. RIGHT.
Fits:
Porsche 996 Carrera 1998-05
Porsche 996 Turbo 2001-05
Click 'Zoom in' for large parts diagram.
Diagram ref no 5
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610672305
The product you are viewing cross references to these numbers
Fits:
Porsche 996 Carrera 1998-05
Porsche 996 Turbo 2001-05
Click 'Zoom in' for large parts diagram.
Diagram ref no 5
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610672305
99610672305
99610672304
99610672302
The product you are viewing cross references to these numbers
Price: €25.74
Arriving soon
Vehicle Group
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
- Porsche 997 MK1 GT2 2007-09
- Porsche 997 MKII GT3 / GT3 RS 2010-11
- Porsche 997 MKII Turbo 2010-13
- Porsche 997 MKII GT2 RS 2011-13
Information
Heater hose - Engine to return line.
OE Match heater coolant return hose is a direct-fit replacement designed to replicate the original Porsche hose used in the heater return circuit on Porsche 911 996 and 997 models. It carries coolant from the heater core back into the engine cooling system, supporting both cabin heating and overall thermal regulation.
Fits:
Porsche 996 Carrera 2002 - 2005 Tiptronic Gearbox only
Porsche 997.1 3.6L / 3.8L 2004 - 2008
Porsche 997.1 Turbo / GT2 2007 - 2009
Porsche 997.2 Turbo / GT2 RS 2010 - 2013
Porsche 997 GT3 3.8 / 4.0 2009 - 2011
Diagram ref no 42
The hose installs directly using original mounting points and standard Porsche hose clamps, making it suitable for both routine maintenance and larger cooling system overhauls.
The heater coolant return hose channels warmed coolant from the heater core back to the engine’s cooling circuit, completing the heater loop. This allows the cooling system to maintain balanced flow and ensures consistent interior heating performance.
Installed between the heater core outlet and the engine return line, this hose:
• Maintains correct coolant flow and pressure in the heater circuit
• Supports reliable cabin heating
• Resists collapse, swelling, and heat degradation
• Integrates with factory hose routing and connections
Its OE-matched geometry ensures proper clearance and reduces stress on joints and adjacent hoses.
Over time, heater hoses deteriorate due to heat cycling and coolant exposure. A failing return hose can cause coolant leaks, reduced heating efficiency, air ingress into the cooling system, or engine overheating. Replacing worn hoses with an OE Match component restores proper coolant circulation and helps prevent unexpected cooling system failures.
When to replace:
• Visible cracks, swelling, or soft spots
• Coolant leaks around the hose ends
• Heater blowing cold air, indicating poor coolant flow
• Cooling system overhaul or heater core service
• Preventive maintenance on high-mile vehicles
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610622275
The product you are viewing cross references to these numbers
OE Match heater coolant return hose is a direct-fit replacement designed to replicate the original Porsche hose used in the heater return circuit on Porsche 911 996 and 997 models. It carries coolant from the heater core back into the engine cooling system, supporting both cabin heating and overall thermal regulation.
Fits:
Porsche 996 Carrera 2002 - 2005 Tiptronic Gearbox only
Porsche 997.1 3.6L / 3.8L 2004 - 2008
Porsche 997.1 Turbo / GT2 2007 - 2009
Porsche 997.2 Turbo / GT2 RS 2010 - 2013
Porsche 997 GT3 3.8 / 4.0 2009 - 2011
Diagram ref no 42
The hose installs directly using original mounting points and standard Porsche hose clamps, making it suitable for both routine maintenance and larger cooling system overhauls.
The heater coolant return hose channels warmed coolant from the heater core back to the engine’s cooling circuit, completing the heater loop. This allows the cooling system to maintain balanced flow and ensures consistent interior heating performance.
Installed between the heater core outlet and the engine return line, this hose:
• Maintains correct coolant flow and pressure in the heater circuit
• Supports reliable cabin heating
• Resists collapse, swelling, and heat degradation
• Integrates with factory hose routing and connections
Its OE-matched geometry ensures proper clearance and reduces stress on joints and adjacent hoses.
Over time, heater hoses deteriorate due to heat cycling and coolant exposure. A failing return hose can cause coolant leaks, reduced heating efficiency, air ingress into the cooling system, or engine overheating. Replacing worn hoses with an OE Match component restores proper coolant circulation and helps prevent unexpected cooling system failures.
When to replace:
• Visible cracks, swelling, or soft spots
• Coolant leaks around the hose ends
• Heater blowing cold air, indicating poor coolant flow
• Cooling system overhaul or heater core service
• Preventive maintenance on high-mile vehicles
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610622275
99610622275
99610622274
99610622265
99610622266
99610622257
99610622256
The product you are viewing cross references to these numbers
Price: €10.47
Arriving soon
Vehicle Group
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
- Porsche 997 MK1 GT2 2007-09
- Porsche 997 MKII GT3 / GT3 RS 2010-11
- Porsche Carrera GT 2003-06
Information
O-ring 39,20 x 3,00 water cooling
This OE match O-ring is a direct replacement for the original Porsche sealing ring used within the water cooling systems of Porsche 996 Turbo, 996 GT3, 997 Turbo, and 997 GT3 models. Manufactured to OE specifications, it features precise dimensions of 39.20mm x 3.00mm to ensure correct sealing performance and factory-style fitment.
Sold individually
Fits:
Porsche 996 turbo - 2000 to 2005
Porsche 996 GT3 - 1999 to 2004
Porsche 997.1 turbo - 2007 to 2009
Porsche 997 GT3 - 2007 to 2011
Porsche Carrera GT - 2003 to 2006
Porsche 918 Spyder
Diagram ref no 14
Proper sealing within the cooling system is essential for maintaining coolant pressure and preventing leaks that could lead to overheating or engine damage. OE Match construction ensures compatibility with original Porsche cooling system components and reliable sealing performance under demanding operating conditions.
Ideal for preventative maintenance, cooling system servicing, or engine rebuild work, this O-ring helps restore proper sealing integrity and reliable coolant circulation.
The O-ring creates a pressure-tight seal between cooling system components, preventing coolant leaks and maintaining correct cooling system pressure. It helps ensure efficient coolant circulation and reliable engine temperature control.
Function
• Seals coolant system connections and housings
• Prevents coolant leakage under pressure
• Maintains correct cooling system pressure
• Supports reliable engine temperature regulation
• Resists heat, coolant exposure, and pressure cycling
Cooling system O-rings harden and lose elasticity over time due to heat exposure, coolant chemicals, and pressure cycling. A deteriorated seal can cause coolant leaks, pressure loss, overheating, and potential engine damage. Replacing worn O-rings during servicing helps maintain cooling system integrity and prevents costly repairs.
When to replace
• Coolant leaks around sealed connections
• During cooling system disassembly or servicing
• Signs of flattened, cracked, or hardened seals
• Loss of coolant pressure
• During engine rebuild or preventative maintenance
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99970741040
The product you are viewing cross references to these numbers
This OE match O-ring is a direct replacement for the original Porsche sealing ring used within the water cooling systems of Porsche 996 Turbo, 996 GT3, 997 Turbo, and 997 GT3 models. Manufactured to OE specifications, it features precise dimensions of 39.20mm x 3.00mm to ensure correct sealing performance and factory-style fitment.
Sold individually
Fits:
Porsche 996 turbo - 2000 to 2005
Porsche 996 GT3 - 1999 to 2004
Porsche 997.1 turbo - 2007 to 2009
Porsche 997 GT3 - 2007 to 2011
Porsche Carrera GT - 2003 to 2006
Porsche 918 Spyder
Diagram ref no 14
Proper sealing within the cooling system is essential for maintaining coolant pressure and preventing leaks that could lead to overheating or engine damage. OE Match construction ensures compatibility with original Porsche cooling system components and reliable sealing performance under demanding operating conditions.
Ideal for preventative maintenance, cooling system servicing, or engine rebuild work, this O-ring helps restore proper sealing integrity and reliable coolant circulation.
The O-ring creates a pressure-tight seal between cooling system components, preventing coolant leaks and maintaining correct cooling system pressure. It helps ensure efficient coolant circulation and reliable engine temperature control.
Function
• Seals coolant system connections and housings
• Prevents coolant leakage under pressure
• Maintains correct cooling system pressure
• Supports reliable engine temperature regulation
• Resists heat, coolant exposure, and pressure cycling
Cooling system O-rings harden and lose elasticity over time due to heat exposure, coolant chemicals, and pressure cycling. A deteriorated seal can cause coolant leaks, pressure loss, overheating, and potential engine damage. Replacing worn O-rings during servicing helps maintain cooling system integrity and prevents costly repairs.
When to replace
• Coolant leaks around sealed connections
• During cooling system disassembly or servicing
• Signs of flattened, cracked, or hardened seals
• Loss of coolant pressure
• During engine rebuild or preventative maintenance
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99970741040
99970741040
The product you are viewing cross references to these numbers
Price: €7.59
In stock
Vehicle Group
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-12
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche Boxster 981 2.7L 2012-16
- Porsche Boxster 981 S / GTS 3.4L 2012-16
- Porsche Boxster 981 Spyder 3.8L 2016
- Porsche Boxster 718 2.0L Manual (300 Bhp) 2017>>
- Porsche Boxster 718 2.0L PDK (300 Bhp) 2017>>
- Porsche Boxster S 718 2.5L Manual (350 Bhp) 05/2017>>
- Porsche Boxster S 718 2.5L PDK (350 Bhp) 05/2017>>
- Porsche Boxster T 718 2.0L Manual (300 Bhp) 01/2019>>
- Porsche Boxster T 718 2.0L PDK (300 Bhp) 01/2019>>
- Porsche Boxster GTS 718 2.5L Manual (365 Bhp) 05/2017>>
- Porsche Boxster GTS 718 2.5L PDK (365 Bhp) 05/2017>>
- Porsche Boxster GTS 718 4.0L Manual (400 Bhp) 01/2019>>
- Porsche Boxster GTS 718 4.0L PDK (400 Bhp) 01/2019>>
- Porsche Boxster Spyder / Spyder RS 718 4.0L 01/2019>>
- Porsche Boxster 25 Years 718 4.0L Manual (400 Bhp) 01/2020>>
- Porsche Boxster 25 Years 718 4.0L PDK (400 Bhp) 01/2020>>
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
- Porsche 997 MK1 GT2 2007-09
- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C4 3.6L 2009-12
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
- Porsche 997 MKII Carrera C4S 3.8L 2009-12
- Porsche 997 MKII GT3 / GT3 RS 2010-11
- Porsche 997 MKII Turbo 2010-13
- Porsche 997 MKII GT2 RS 2011-13
- Porsche 991.1 Carrera C2 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C2S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche 991.1 Carrera C4 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C4S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche 991.1 Turbo 3.8L (520 Bhp) 2014-16
- Porsche 991.1 Turbo S 3.8L (560 Bhp) 2014-16
- Porsche 991.1 R 4.0L (500 Bhp) 2016
- Porsche 991.1 GT3 3.8L (475 Bhp) 2014-16
- Porsche 991.1 GT3 RS 4.0L (500 Bhp) 2015-16
- Porsche 991.2 Carrera 2 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Carrera 2S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Carrera 4 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Carrera 4S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Cabriolet 2 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Cabriolet 2S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Cabriolet 4 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Cabriolet 4S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Targa 4 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Targa 4S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Turbo Coupe 3.8L (540 Bhp) 2016-19
- Porsche 991.2 Turbo S Coupe 3.8L (580 Bhp) 2016-19
- Porsche 991.2 Turbo Cabriolet 3.8L (540 Bhp) 2016-19
- Porsche 991.2 Turbo S Cabriolet 3.8L (580 Bhp) 2016-19
- Porsche 991.2 Speedster 4.0L (510Bhp) 2019
- Porsche 991.2 GT3 4.0L (500 Bhp) / GT3 RS 4.0L (520 Bhp) 2017-19
- Porsche 991.2 GT2 RS 3.8L PDK (700 bhp) 2018-19
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman 2.9L 987C MKII 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
- Porsche Cayman 2.7L 981 2013-16
- Porsche Cayman S / GTS 3.4L 981 2013-16
- Porsche Cayman GT4 3.8L 2015-16
- Porsche Cayman 718 2.0L Manual (300 Bhp)
- Porsche Cayman 718 2.0L PDK (300 Bhp)
- Porsche Cayman S 718 2.5L Manual (350 Bhp)
- Porsche Cayman S 718 2.5L PDK (350 Bhp)
- Porsche Cayman T 718 2.0L Manual (300 Bhp)
- Porsche Cayman T 718 2.0L PDK (300 Bhp)
- Porsche Cayman GTS 718 2.5L Manual (365 Bhp)
- Porsche Cayman GTS 718 2.5L PDK (365 Bhp)
- Porsche Cayman GTS 718 4.0L Manual (400 Bhp)
- Porsche Cayman GTS 718 4.0L PDK (400 Bhp)
- Porsche Cayman GT4 718 4.0L / GT4 RS 718 4.0L
Information
O-ring – 46.7 x 3.53 – used in various applications within the car's cooling system.
Fits:
Porsche 987 Boxster 2005-12
Porsche 987 Cayman 2006-12
Porsche 981 Boxster 2012-16
Porsche 981 Boxster Spyder 2016
Porsche 981 Cayman 2014-16
Porsche 981 Cayman GT4 2016
Porsche 718 (982) Boxster 2017>>
Porsche 718 (982) Boxster Spyder 2019>>
Porsche 718 (982) Cayman 2017>>
Porsche 718 (982) Cayman GT4 2019>>
Porsche 996 GT3 / RS 1999-05
Porsche 996 Turbo / GT2 2001-05
Porsche 997 Carrera 2005-12
Porsche 997 Turbo / GT2 RS 2007-13
Porsche 997 GT3 / RS 2007-11
Porsche 991 Carrera 2012-19
Porsche 991 Turbo / GT2 RS 2014-20
Porsche 991 GT3 / RS 2014-21
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610680103
The product you are viewing cross references to these numbers
Fits:
Porsche 987 Boxster 2005-12
Porsche 987 Cayman 2006-12
Porsche 981 Boxster 2012-16
Porsche 981 Boxster Spyder 2016
Porsche 981 Cayman 2014-16
Porsche 981 Cayman GT4 2016
Porsche 718 (982) Boxster 2017>>
Porsche 718 (982) Boxster Spyder 2019>>
Porsche 718 (982) Cayman 2017>>
Porsche 718 (982) Cayman GT4 2019>>
Porsche 996 GT3 / RS 1999-05
Porsche 996 Turbo / GT2 2001-05
Porsche 997 Carrera 2005-12
Porsche 997 Turbo / GT2 RS 2007-13
Porsche 997 GT3 / RS 2007-11
Porsche 991 Carrera 2012-19
Porsche 991 Turbo / GT2 RS 2014-20
Porsche 991 GT3 / RS 2014-21
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610680103
99610680103
The product you are viewing cross references to these numbers
Price: €4.50
In stock
Vehicle Group
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
Information
Water coolant hose.
Fits:
Porsche 996 - 2002 onwards
For engine codes - M96-10, M96-02, M96-04, M96-03
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610683204
The product you are viewing cross references to these numbers
Fits:
Porsche 996 - 2002 onwards
For engine codes - M96-10, M96-02, M96-04, M96-03
Click 'Zoom in' for large parts diagram.
Diagram ref no 24
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610683204
99610683204
99610683203
The product you are viewing cross references to these numbers
Price: €46.74
In stock
Vehicle Group
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
Information
Water hose that fits to the water pump part number 99610612155.
This OE Match water hose is a coolant hose designed to connect the engine cooling circuit to the water thermostat housing on Porsche 911 (996) models produced between 1998 and 2005. This hose forms part of the engine’s cooling system, allowing coolant to circulate between the engine and thermostat assembly to regulate operating temperature.
Fits:
Porsche 996 C2 / C4 / C4S 1998 - 2005
Diagram ref no 24
This product supersedes Porsche's old part numbers: 99610650253, 99610650254.
The hose carries coolant between the thermostat housing and the engine’s cooling pipes. This allows the thermostat to regulate coolant flow depending on engine temperature, ensuring the engine warms up efficiently and remains within the correct operating range.
A properly functioning coolant hose is essential to maintain stable engine temperatures and prevent overheating.
Function
• Coolant Circulation: Transfers coolant between the thermostat housing and engine cooling pipes
• Temperature Regulation: Supports thermostat operation in controlling engine temperature
• Cooling System Integrity: Maintains sealed coolant flow under pressure
• Engine Protection: Helps prevent overheating and cooling system leaks
Coolant hoses operate under constant heat and pressure. Over time the rubber can become brittle, swell or crack due to thermal cycling and coolant exposure. A deteriorated hose may cause coolant leaks or reduced cooling efficiency, potentially leading to engine overheating. Replacing worn hoses ensures the cooling system maintains proper pressure and flow.
When to Replace. Consider replacing the hose if you notice:
• Visible cracks, swelling or deterioration in the rubber
• Coolant leaks around the thermostat connection
• Loss of coolant pressure or overheating issues
• During cooling system overhaul or thermostat replacement.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610650256
The product you are viewing cross references to these numbers
This OE Match water hose is a coolant hose designed to connect the engine cooling circuit to the water thermostat housing on Porsche 911 (996) models produced between 1998 and 2005. This hose forms part of the engine’s cooling system, allowing coolant to circulate between the engine and thermostat assembly to regulate operating temperature.
Fits:
Porsche 996 C2 / C4 / C4S 1998 - 2005
Diagram ref no 24
This product supersedes Porsche's old part numbers: 99610650253, 99610650254.
The hose carries coolant between the thermostat housing and the engine’s cooling pipes. This allows the thermostat to regulate coolant flow depending on engine temperature, ensuring the engine warms up efficiently and remains within the correct operating range.
A properly functioning coolant hose is essential to maintain stable engine temperatures and prevent overheating.
Function
• Coolant Circulation: Transfers coolant between the thermostat housing and engine cooling pipes
• Temperature Regulation: Supports thermostat operation in controlling engine temperature
• Cooling System Integrity: Maintains sealed coolant flow under pressure
• Engine Protection: Helps prevent overheating and cooling system leaks
Coolant hoses operate under constant heat and pressure. Over time the rubber can become brittle, swell or crack due to thermal cycling and coolant exposure. A deteriorated hose may cause coolant leaks or reduced cooling efficiency, potentially leading to engine overheating. Replacing worn hoses ensures the cooling system maintains proper pressure and flow.
When to Replace. Consider replacing the hose if you notice:
• Visible cracks, swelling or deterioration in the rubber
• Coolant leaks around the thermostat connection
• Loss of coolant pressure or overheating issues
• During cooling system overhaul or thermostat replacement.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610650256
99610650253
99610550254
99610550256
The product you are viewing cross references to these numbers
Price: €45.63
In stock
Vehicle Group
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
Information
Water Hose that fits to the Water Pump part number 99610601156.
3-way to water pipe; original style with bleed nipple and straight flared hose end.
Fits:
Porsche 996 C2 / C4 1998-01 3.4L
This product supersedes Porsche's old part numbers:
- 99610625053
- 99610625054
- 99610625055
- 99610685000
Diagram ref no 18.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610685005
The product you are viewing cross references to these numbers
3-way to water pipe; original style with bleed nipple and straight flared hose end.
Fits:
Porsche 996 C2 / C4 1998-01 3.4L
This product supersedes Porsche's old part numbers:
- 99610625053
- 99610625054
- 99610625055
- 99610685000
Diagram ref no 18.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610685005
99610625053
99610625054
99610625055
99610685000
99610685005
The product you are viewing cross references to these numbers
Price: €38.61
Arriving soon
Vehicle Group
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
Information
Water hose that fits to the water pump part number 99610601176.
Fits:
Porsche 996 Turbo 2001-05
Click 'Zoom in' to see the diagram.
Diagram ref no 23.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610625074
The product you are viewing cross references to these numbers
Fits:
Porsche 996 Turbo 2001-05
Click 'Zoom in' to see the diagram.
Diagram ref no 23.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610625074
99610625072
99610625074
99610625071
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Price: €25.74
Orderable
Vehicle Group
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
Information
Water hose. Engine Supply Pipe to Main Supply Pipe.
Fits:
Porsche 996 C2 1998-05
For Rear-wheel drive cars (I338)
Click 'Zoom in' for large parts diagram.
Diagram ref no 1
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610664056
The product you are viewing cross references to these numbers
Fits:
Porsche 996 C2 1998-05
For Rear-wheel drive cars (I338)
Click 'Zoom in' for large parts diagram.
Diagram ref no 1
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610664056
99610664053
99610664054
99610664056
911612-010
The product you are viewing cross references to these numbers
Price: €38.61
In stock
Vehicle Group
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
Information
Water hose for cars with Tiptronic gearbox
High-quality OE Match coolant hose engineered to match the original Porsche specification for fit, flexibility, and durability. It is designed for the Porsche 996 (911) 1998–2005 with Tiptronic automatic transmission, and carries coolant within the engine’s cooling circuit to maintain proper operating temperatures. It installs directly in place of the original hose with no modification required, ensuring correct coolant flow and long-term service life.
Fits:
Porsche 996 C2 / C4 / C4S 1998 - 2005 Tiptronic Gearbox
Diagram ref no 33.
The Porsche 996’s water cooling system is responsible for regulating engine temperature under all driving conditions - from cold starts to high-speed touring. The water hose is a critical link in the coolant circuit, connecting key components such as the water pump, thermostat housing, radiator, and cylinder head.
Over time, heat cycling, pressure fluctuations, and environmental exposure cause hoses to age. Rubber can harden, swell, crack, or develop soft spots that lead to leaks, reduced coolant flow, or sudden failure. Because this hose operates under both thermal and pressure stress, deterioration can compromise cooling performance and increase the risk of engine overheating.
The water hose:
• Carries pressurised engine coolant between major cooling system components
• Maintains consistent coolant flow for stable temperature control
• Withstands heat, vibration, and pressure from the engine’s cooling system
• Helps prevent overheating and protects engine components
A compromised water hose can lead to:
• Coolant leaks
• Reduced heating efficiency
• Engine overheating
• Loss of pressure in the cooling circuit
Replacing old or degraded hoses with an OE Match water hose helps maintain coolant flow, preserves optimal engine temperatures, and prevents unexpected breakdowns due to hose failure.
Replace this water hose if you notice:
• Visible cracks, soft spots, or swelling
• Coolant leakage at hose ends
• Unexplained engine overheating
• During water pump or thermostat service
• As part of preventative maintenance on higher-mile vehicles
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610622266
The product you are viewing cross references to these numbers
High-quality OE Match coolant hose engineered to match the original Porsche specification for fit, flexibility, and durability. It is designed for the Porsche 996 (911) 1998–2005 with Tiptronic automatic transmission, and carries coolant within the engine’s cooling circuit to maintain proper operating temperatures. It installs directly in place of the original hose with no modification required, ensuring correct coolant flow and long-term service life.
Fits:
Porsche 996 C2 / C4 / C4S 1998 - 2005 Tiptronic Gearbox
Diagram ref no 33.
The Porsche 996’s water cooling system is responsible for regulating engine temperature under all driving conditions - from cold starts to high-speed touring. The water hose is a critical link in the coolant circuit, connecting key components such as the water pump, thermostat housing, radiator, and cylinder head.
Over time, heat cycling, pressure fluctuations, and environmental exposure cause hoses to age. Rubber can harden, swell, crack, or develop soft spots that lead to leaks, reduced coolant flow, or sudden failure. Because this hose operates under both thermal and pressure stress, deterioration can compromise cooling performance and increase the risk of engine overheating.
The water hose:
• Carries pressurised engine coolant between major cooling system components
• Maintains consistent coolant flow for stable temperature control
• Withstands heat, vibration, and pressure from the engine’s cooling system
• Helps prevent overheating and protects engine components
A compromised water hose can lead to:
• Coolant leaks
• Reduced heating efficiency
• Engine overheating
• Loss of pressure in the cooling circuit
Replacing old or degraded hoses with an OE Match water hose helps maintain coolant flow, preserves optimal engine temperatures, and prevents unexpected breakdowns due to hose failure.
Replace this water hose if you notice:
• Visible cracks, soft spots, or swelling
• Coolant leakage at hose ends
• Unexplained engine overheating
• During water pump or thermostat service
• As part of preventative maintenance on higher-mile vehicles
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610622266
99610622265
99610622266
99610622257
99610622256
The product you are viewing cross references to these numbers
Price: €29.25
In stock
Vehicle Group
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
Information
Water hose for cars with manual gearbox.
It provides reliable coolant flow between the engine and the heating/cooling system, maintaining optimal operating temperature and engine performance. Manufactured to match the original equipment’s material specification, bend geometry, this hose delivers a direct fit and factory-style durability.
Fits:
Porsche 996 C2 / C4 3.4L Manual Gearbox
Up to model year 2001
Diagram ref no 33
• Position on Vehicle: Located within the engine cooling circuit, this hose connects key engine cooling components and is mounted in the front engine bay.
• Cross-Reference / Alternative Numbers: Part number 996 106 222 65 (99610622265) — includes superseded numbers such as 99610622252, 99610622254, 99610622256.
• Applications: Ideal for when the original hose has become brittle, swollen, leaking or is due for renewal during engine service or cooling system overhaul.
The coolant hose is vital in maintaining proper engine temperature, protecting against overheating and ensuring the cooling system works as designed. A worn or damaged hose can lead to coolant leaks, engine overheating, poor heater performance or even severe engine damage. Replacing restores secure coolant flow, prevents failure and ensures your Porsche runs reliably.
When and why to replace:
• Visible cracks, bulging or brittleness in the original hose.
• Coolant leakage or low coolant level with no obvious external damage.
• Heating or cooling performance has reduced (e.g., slow warm-up or overheating).
• During scheduled cooling system service or when replacing other cooling system components.
• High-mileage vehicles where original hoses are showing signs of age and fatigue.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610622265
The product you are viewing cross references to these numbers
It provides reliable coolant flow between the engine and the heating/cooling system, maintaining optimal operating temperature and engine performance. Manufactured to match the original equipment’s material specification, bend geometry, this hose delivers a direct fit and factory-style durability.
Fits:
Porsche 996 C2 / C4 3.4L Manual Gearbox
Up to model year 2001
Diagram ref no 33
• Position on Vehicle: Located within the engine cooling circuit, this hose connects key engine cooling components and is mounted in the front engine bay.
• Cross-Reference / Alternative Numbers: Part number 996 106 222 65 (99610622265) — includes superseded numbers such as 99610622252, 99610622254, 99610622256.
• Applications: Ideal for when the original hose has become brittle, swollen, leaking or is due for renewal during engine service or cooling system overhaul.
The coolant hose is vital in maintaining proper engine temperature, protecting against overheating and ensuring the cooling system works as designed. A worn or damaged hose can lead to coolant leaks, engine overheating, poor heater performance or even severe engine damage. Replacing restores secure coolant flow, prevents failure and ensures your Porsche runs reliably.
When and why to replace:
• Visible cracks, bulging or brittleness in the original hose.
• Coolant leakage or low coolant level with no obvious external damage.
• Heating or cooling performance has reduced (e.g., slow warm-up or overheating).
• During scheduled cooling system service or when replacing other cooling system components.
• High-mileage vehicles where original hoses are showing signs of age and fatigue.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610622265
99610622265
99610622266
99610622257
99610622256
99610622252
99610622254
99610622255
The product you are viewing cross references to these numbers
Price: €57.33
In stock
Also found on these pages
-
water cooling - 1 - for 996 CARRERA 2/4/4S M96.01/02/03/04 1998-05 105-05
-
water cooling - 2 - for 996 CARRERA M339 (all-wheel drive) M96.01/02/03/04 1998-05 105-12
-
belt tensioner, belt drive 996 TURBO 2001-05 101-15
-
connection piece 996 TURBO 2001-05 105-00
-
lines heating 996 TURBO 2001-05 105-03
-
water cooling - 1 - for 996 TURBO 2001-05 105-05
-
water cooling - 2 - for 996 TURBO 2001-05 105-12
-
belt tensioner, belt drive 996 GT3-1 M96.76 2000-01 and 996 GT3-1/GT3 RS M96.79 2004-05 101-15
-
water pump, water pump housing 996 GT3-1 M96.76 2000-01 and 996 GT3-1/GT3 RS M96.79 2004-05 105-00
-
lines heating 996 GT3-1 M96.76 2000-01 and 996 GT3-1/GT3 RS M96.79 2004-05 105-03
-
water cooling 1 for 996 GT3-1 M96.76 2000-01 and 996 GT3-1/GT3 RS M96.79 2004-05 105-05
About Coolant Hoses - Engine Bay
OEMatch Coolant Hoses - Engine Bay — Fit, Function, Confidence
Engine-bay coolant hoses route coolant between the radiator, water pump and engine to maintain operating temperature in Porsche models. OEMatch supplies a wide selection of hose types and the related clips and connectors commonly needed for routine maintenance and targeted repairs.
Available Types- Upper and lower radiator hoses for coolant flow between engine and radiator
- Water pump connection hoses that link pump outlets to the cooling circuit
- Heater and bypass hoses for cabin heat and system circulation
- Silicone and reinforced rubber options for higher temperature or performance applications
- Flexible couplers and joining pieces used at junctions and branch points
OEM (Original Equipment Manufacturer) parts are made by the same company that produced your Porsche’s original coolant hoses. OE (Original Equipment) refers to parts matching original specifications for the coolant hoses and may be supplied by alternative manufacturers. Aftermarket parts offer alternative options, sometimes with enhanced features or better value. OEMatch supplies non-OEM coolant hoses engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models. In practical terms, engine-bay hoses are selected for internal diameter, length, bend profile and material to suit the coolant routing and connection points used on each Porsche model.
Benefits Include- Restored coolant circulation to maintain stable engine temperatures
- Reduced risk of leaks, overheating and related component damage
- Renewed hose ends and secure connections at clamps and fittings
- Heat ageing and repeated thermal cycling that harden or crack rubber
- Chemical attack from coolant breakdown or contamination
- Abrasion where hoses contact adjacent components or fastenings
- Loose or degraded clamps that allow leaks at joints
Timely replacement prevents coolant loss and the risk of engine overheating that can lead to more extensive repairs. Using correctly specified hoses and renewed clamps helps preserve the cooling circuit and supports reliable operation across driving conditions for Porsche models. Replace any hose showing swelling, cracking or soft spots and confirm connections while the system is cold.
Advantages- Direct-fit replacements engineered to match original dimensions and tolerances
- Options in reinforced rubber and silicone to suit temperature and service requirements
- Supplies commonly include compatible clips, seals and joining pieces for straightforward installation
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