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- Porsche 957 Cayenne 3.0L Diesel 2007-10
- Porsche 957 Cayenne 3.6L 2007-10
- Porsche 957 Cayenne S / GTS 4.8L 2007-10
- Porsche 957 Cayenne Turbo / Turbo S 4.8L 2007-10
- Porsche 958 Cayenne V6 3.6L Petrol (300Hp) 2010-17
- Porsche 958 Cayenne V6 3.0L Diesel (245Hp) 2010-17
- Porsche 958 Cayenne S V6 3.0L Hybrid (380Hp) 2010-17
- Porsche 958 Cayenne S V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne S V8 4.2L Diesel (382Hp) 2010-17
- Porsche 958 Cayenne GTS V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne Turbo V8 4.8L Petrol (500Hp) 2010-17
- Porsche 958 Cayenne Turbo S V8 4.8L Petrol (550Hp) 2010-17
Auxiliary Coolant Pump for Heating System
The auxiliary coolant pump for the Porsche 955, 957 and 958
Cayenne is a secondary electric water pump designed to support coolant
circulation through the vehicle’s heating system. This pump ensures consistent
coolant flow to the heater matrix, improving cabin heating performance and
maintaining balanced engine temperature control. This is a key component of the cooling and climate system, particularly in colder conditions and during idle operation.
Fits:
- Porsche 957 Cayenne 3.0L Diesel 2007-10
- Porsche 957 Cayenne 3.6L 2007-10
- Porsche 957 Cayenne S / GTS 4.8L 2007-10
- Porsche 957 Cayenne Turbo / Turbo S 4.8L 2007-10
- Porsche 958 Cayenne V6 3.6L Petrol (300Hp) 2010-17
- Porsche 958 Cayenne V6 3.0L Diesel (245Hp) 2010-17
- Porsche 958 Cayenne S V6 3.0L Hybrid (380Hp) 2010-17
- Porsche 958 Cayenne S V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne S V8 4.2L Diesel (382Hp) 2010-17
- Porsche 958 Cayenne GTS V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne Turbo V8 4.8L Petrol (500Hp) 2010-17
- Porsche 958 Cayenne Turbo S V8 4.8L Petrol (550Hp) 2010-17
Diagram ref no 24
What the Auxiliary Coolant Pump Does
Unlike the main engine-driven water pump, the auxiliary
coolant pump operates electrically and assists with circulating coolant when
required. It is responsible for:
- Supplying hot coolant to the cabin heater core
- Supporting even heat distribution inside the vehicle
- Maintaining coolant flow at idle or low engine speeds
- Assisting with temperature regulation in complex cooling systems
- Improving warm-up efficiency
In Porsche Cayenne models equipped with advanced climate control systems, the auxiliary pump plays an important role in ensuring reliable heating performance.
Why Auxiliary Coolant Pumps Fail
Over time, the auxiliary coolant pump can fail due to:
- Electrical motor wear
- Internal bearing degradation
- Coolant contamination
- Heat cycling within the engine bay
- Age-related plastic housing fatigue
- Corrosion from coolant exposure
Because the pump operates electrically, failure may occur suddenly or gradually.
Common symptoms of a failing auxiliary coolant pump include:
- Weak or inconsistent cabin heating
- Heater blowing cold air at idle
- Coolant circulation fault codes
- Check engine or cooling system warning lights
- Unusual noise from the cooling system
- Coolant leaks around the pump housing
When You Should Replace the Auxiliary Coolant Pump
You should consider replacing the auxiliary coolant pump if:
- Cabin heating performance becomes inconsistent
- The vehicle struggles to maintain warm air at idle
- Diagnostic fault codes indicate coolant circulation issues
- The pump becomes noisy or stops functioning
- You are servicing other cooling system components
- The vehicle has high mileage and original cooling parts
Replacing the pump proactively helps maintain reliable heating performance and prevents strain on other cooling system components.
At Design911, we supply high-quality auxiliary coolant pumps engineered to meet OEM specifications. Designed for durability and reliable performance, this pump restores proper coolant circulation and heating efficiency.
Maintaining your Cayenne’s cooling and heating system is essential for both comfort and long-term engine reliability.
Key Benefits at a Glance
- Direct replacement auxiliary coolant pump
- Restores cabin heating efficiency
- Maintains proper coolant circulation
- Reduces risk of overheating or heater malfunction
- Suitable for Porsche 955, 957 and 958 Cayenne
- Ideal for repair or preventative cooling system maintenance
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95857215010
The product you are viewing cross references to these numbers
- 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 997 MKII Turbo 2010-13
- Porsche 997 MKII GT2 RS 2011-13
This OE Match joining socket is a water pump housing connector used in the Porsche 911 cooling system. It is designed to connect the water pump housing and related coolant pipework, providing an OE-style fit and reliable sealing performance.
Sold individually,
Fits:
Porsche 996 Turbo 2001 - 2005
Porsche 996 GT3 2000 - 2005
Porsche 997 Turbo / GT2 2007 - 2009
Porsche 997 GT2 RS 2011
Porsche 997 GT3 2007 - 2011
Diagram ref no 17
The joining socket forms a secure connection point within the coolant circuit, allowing coolant to pass correctly between the water pump housing and connected fittings or pipe sections. It helps maintain coolant flow, supports engine temperature control, and prevents coolant leaks around the water pump housing area.
Functions
• Connects the water pump housing to coolant fittings or pipework
• Helps maintain correct coolant flow through the engine cooling system
• Provides a secure joining point between cooling system components
• Helps prevent coolant leaks at the water pump housing connection
• Supports reliable engine temperature regulation
• Restores correct fitment when replacing or servicing coolant pipes
• OE Match design for direct replacement and accurate installation
The water pump housing joining socket is exposed to constant heat cycles, coolant pressure, vibration, and age-related wear. Over time, the connector can corrode, crack, seize, or fail to seal correctly, leading to coolant leaks or poor cooling system reliability. Replacing it during water pump or coolant pipe service helps ensure a tight, secure connection and protects the engine from coolant loss or overheating.
When to Replace
• Coolant is leaking around the water pump housing or pipe connection
• The joining socket is cracked, corroded, damaged, or seized
• The cooling system has been dismantled for water pump or pipework repairs
• Coolant fittings or pipe bends are being replaced
• The original connector no longer seals correctly
• There are signs of coolant residue or staining near the connection
• As preventative maintenance during major cooling system work
This connector fits into the engine's cooling system, near the water pump housing. It connects the cooling system hoses or fittings to the water pump housing and can be used at several points in the cooling system, depending on the engine model and design. Some refer to it as a water pipe joining socket, water pump housing connector, or coolant pipe adapter.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610623871
The product you are viewing cross references to these numbers
- 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
Fits
Porsche 997 Turbo / GT2 2007-09
Porsche 997 GT3 / GT3 RS / GT3 4.0 2007-12
Porsche 997.2 Turbo 2010-11 (3.6L M97.70 engines)
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99710601172
The product you are viewing cross references to these numbers
- 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 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
- 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
- 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
Sold each
Fits:
Porsche 986 Boxster - 1997 to 2004
Porsche 987 Boxster / Cayman - 2005 to 2012
Porsche 993 - 1994 to 1998
Porsche 997 - 2005 to 2012
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90037801301
The product you are viewing cross references to these numbers