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Coolant Hoses - Centre Section
By OE Match
- 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 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 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
OE Match connector sleeve for the cooling-system pipework, two sleeves are required, with one fitted on either side.
Fits
Porsche 987 Boxster / S 2005>> MKI & MKII
Porsche 987C Cayman / S 2006>> MKI & MKII
Porsche 997 Carrera 2005>> MKI & MKII (Coupe / Cabrio)
Porsche 997 Turbo/GT2 MKI & MKII 2007>>
Porsche 997 GT3 2007>>
Check fitment for your specific vehicle (model, year, engine) before ordering.
Diagram ref: 28
What This Product Does
This sleeve forms part of the water-cooling pipework assembly. It is a separate component from the associated cross tubes, distributor pipes, hoses and supporting brackets.
Technical Details
- Reference: 99710655103; brand: OE Match.
- Need 2 of these one for each side
Symptoms of Fault
Coolant loss, damp connections or dried deposits warrant inspection of the surrounding pipework. These signs do not establish that the sleeve itself is faulty; adjoining hoses, pipes and fittings should also be checked.
Why Replacement Matters
Renew a damaged sleeve when repairing the relevant cooling assembly. Inspect neighbouring components during dismantling so that worn connections or supporting hardware are not overlooked.
FAQs
How many sleeves are needed?
The supplied application information specifies two, with one on either side.
Is item 28 correct for every model?
No. Item 28 identifies the sleeve in the supplied 997.2 Carrera diagram; other applications use different positions.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99710655103
The product you are viewing cross references to these numbers
- 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 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 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
OE Match coolant hose for replacement cooling-circuit component. When replacing we also recommend a coolant flush and replacement to remove any possible sludge formed over time.
Fits
Porsche 987 Boxster
Porsche 987C Cayman
Porsche 997
Check fitment for your specific vehicle (model, year, engine) before ordering.
Diagram ref: 3
What This Product Does
The hose carries coolant through its section of the cooling circuit, providing a flexible connection between adjoining components. Its condition matters because deterioration or a leaking connection can allow coolant to escape.
Functions
- Conveys coolant through the connected pipework.
- Accommodates movement at the hose connection.
- Helps contain coolant within the circuit.
Technical Details
- Product reference: 99710672307.
- Related references: 99710672306, 99710672305 and 99710672304.
- Cooling-assembly diagrams specify two hoses per illustrated assembly
Symptoms of Fault
- Cracks, hardening or general hose deterioration.
- Swollen or unusually soft sections.
- Wet connections, staining or dried coolant deposits.
- A falling coolant level or recurring coolant warning.
- A sweet odour, gurgling or elevated engine temperature.
These signs can have several causes, so inspect the complete cooling circuit before identifying the hose as faulty.
Why Replacement Matters
Renewing a damaged hose addresses a potential source of coolant loss. Inspect adjoining connections, seals, retaining hardware and supports during the repair, particularly where rubbing or seepage is visible. Consider flushing the circuit and renewing the coolant to clear accumulated deposits, following the vehicle-specific servicing procedure.
FAQs
How can a suspected leak be located?
A cooling-system pressure test can help identify seepage from hoses and connections.
Why might coolant disappear without leaving a puddle?
Escaping fluid may collect on an undertray or evaporate, leaving deposits instead.
What should be checked before selecting this hose?
Confirm the vehicle details and compare the original reference with the numbers listed above.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99710672307
The product you are viewing cross references to these numbers
- 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 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 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
This left coolant return hose by OE Match is replacement hose for the left-hand return circuit.
Fits
- Porsche 987 Boxster
- Porsche 987C Cayman
- Porsche 997
Check fitment for your specific vehicle (model, year, engine) before ordering.
Diagram ref no 31
What This Product Does
The hose carries returning coolant through its designated connection within the cooling circuit. It is the left-hand return component, rather than a supply hose or the adjoining rigid pipework.
Functions
- Provides a passage for coolant returning through the circuit.
- Connects the adjoining cooling-system components at the specified left-hand position.
Technical Details
- Brand: OE Match; product reference: 99710672803.
- Position and purpose: Left, coolant return line.
Symptoms of Fault
Possible signs include falling coolant levels, a sweet odour, damp connections, dried deposits around joints, swollen hose sections or leakage after shutdown. Gurgling and an increasing temperature reading can accompany coolant loss, but do not identify this hose alone as the cause.
Why Replacement Matters
Renewal is appropriate when inspection confirms deterioration, abrasion or leakage. Check nearby pipes, retaining brackets, connectors and clamps during the repair: an unresolved supporting fault can leave the replacement connection vulnerable to further damage.
FAQs
How can a suspected leak be located?
A cooling-system pressure test, combined with inspection of hose ends and adjoining connections, can help establish the source.
Why might coolant disappear without leaving a puddle?
Escaping coolant may collect on an undertray or evaporate before reaching the ground.
Does gurgling confirm hose failure?
No. Air entering through a leak or insufficient coolant can produce similar sounds; diagnose the complete circuit.
What should be checked before fitting?
Match the reference, model, engine and production details, then inspect the connecting hardware and supporting pipework.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99710672803
The product you are viewing cross references to these numbers
- 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 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 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
High-quality OE Match replacement coolant line designed to match the original Porsche factory hose in shape, dimensions, and performance. It serves as the right-side return path in the engine cooling system, helping ensure efficient coolant circulation and temperature regulation.
Fits:
Porsche 987 Boxster 2005 - 2008
Porsche 987C Cayman 2006 - 2008
Porsche 987.2 Boxster 2009 - 2012
Porsche 987C.2 Cayman 2009 - 2012
Porsche 997.1 Carrera 2005 - 2008
Porsche 997.1 Turbo / GT3 2007 - 2008
Porsche 997.2 Carrera 2009 - 2012
Porsche 997.2 Turbo / GT3 2009 - 2013
Diagram ref no 32
The return hose carries coolant back toward the engine or radiator after it has circulated through the engine and thermostat housing. A failed or deteriorated hose can lead to coolant leaks, overheating, air ingestion into the cooling system, and potential engine damage if left unchecked. This OE Match replacement ensures a secure seal, proper flow path, and long service life.
This hose installs directly in place of the original with no modification required, making it ideal for repairs, cooling system maintenance, or replacing a soft or aged hose during service intervals.
The coolant return hose provides a pressure-rated, heat-resistant passage for engine coolant to return from the engine head/end tank area back into the cooling circuit. It is an integral part of the cooling loop that manages engine temperature and prevents overheating under load or hot conditions.
Function:
• Transports coolant through the return leg of the cooling system
• Maintains proper sealing and pressure under thermal cycles
• Helps prevent coolant leaks and air entry into the coolant circuit
Over time, coolant hoses degrade due to heat, pressure, and exposure to coolant and environmental factors. A cracked, swollen, or leaking hose can cause loss of coolant, engine overheating, and accelerated wear on other cooling components. Replacing old hoses with an OE Match coolant return hose restores proper coolant routing, improves cooling reliability, and reduces the risk of costly engine damage.
When to replace:
• Visible cracks, bulges, or soft spots in the hose
• Evidence of coolant weeping or staining
• Cooling system overheating or inconsistent temperature readings
• During timing belt or water pump service intervals
• At recommended maintenance intervals or when age-related wear appears
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99710662403
The product you are viewing cross references to these numbers
- 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 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 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
OE Match left coolant supply hose
Fits
- Porsche 987 Boxster 2005-08
- Porsche 987C Cayman 2006-08
- Porsche 987.2 Boxster 2009-12
- Porsche 987C.2 Cayman 2009-12
- Porsche 997.1 Carrera 2005-08
- Porsche 997.1 Turbo / GT3 2007-08
- Porsche 997.2 Carrera 2009-12
- Porsche 997.2 Turbo / GT3 2009-13
Check fitment for your specific vehicle (model, year, engine) before ordering.
Diagram ref no 29
What This Product Does
This flexible coolant connection carries fluid through the vehicle's cooling circuit. Its condition and the sealing of its connections matter when investigating coolant loss.
Functions
- Provides a coolant passage between connected pipework.
- Accommodates movement within the hose connection.
- Helps contain coolant when correctly fitted and sealed.
Technical Details
- Supplied reference: 99710662303.
- Position: Left.
Symptoms of Fault
- Falling coolant level or repeated low-level warnings.
- Sweet odour, damp connections or deposits around hose ends.
- Coolant collecting on the undertray.
- Cracking, swelling, soft patches or rubbing damage.
- Gurgling or an increasing temperature reading.
Why Replacement Matters
Renewing a deteriorated or leaking hose addresses a potential source of coolant loss. Inspect adjoining pipes, retaining clips, seals and supports so that worn connections or rubbing do not remain unresolved. OE Match develops replacement parts around Porsche applications, with specification checks and sample evaluation forming part of its programme.
FAQs
Why might coolant disappear without leaving a puddle?
Escaping fluid can collect on an undertray or evaporate from warm surfaces.
How can a suspected leak be located?
A cooling-system pressure test and inspection of the hose connections can help identify seepage.
What should be checked before fitting?
Confirm the vehicle application and reference, then inspect neighbouring fittings and supports for damage or wear.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99710662303
The product you are viewing cross references to these numbers
- 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 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 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
OE Match right-hand coolant supply hose
Fits
- Porsche 987 Boxster 2005-08
- Porsche 987C Cayman 2006-08
- Porsche 987.2 Boxster 2009-12
- Porsche 987C.2 Cayman 2009-12
- Porsche 997.1 Carrera 2005-08
- Porsche 997.1 Turbo / GT3 2007-08
Porsche 997.2 Carrera 2009-12
Porsche 997.2 Turbo / GT3 2009-13
Check fitment for your specific vehicle (model, year, engine) before ordering.
Diagram ref: 30
What This Product Does
This hose carries coolant within the supply side of the cooling circuit. Its flexible connection accommodates movement between adjoining components while containing coolant under normal system pressure.
Functions
- Provides the right-hand coolant supply connection.
- Transfers coolant between connected cooling-system components.
- Accommodates movement at the hose connection.
Technical Details
- Supplied part reference: 99710662703; brand: OE Match.
- Position: Right; circuit designation: supply.
Symptoms of Fault
- Falling coolant level or repeated low-level warnings.
- Damp hose connections, dried deposits or undertray staining.
- A sweet odour following use.
- Cracked, swollen, softened or visibly abraded hose sections.
- Gurgling noises or an increasing temperature reading.
Why Replacement Matters
Ageing or damaged hose connections can allow coolant to escape, potentially leading to overheating. Replace a confirmed defective hose and inspect neighbouring pipes, supports, seals and clips to identify related deterioration. OE Match develops replacement components around Porsche applications, using original references and specification checks to assess suitability.
FAQs
How should a suspected leak be checked?
A cooling-system pressure test can help locate seepage at hose ends and adjoining connections rather than relying on symptoms alone.
Why might coolant disappear without leaving a puddle?
Escaping fluid may collect on an undertray or evaporate, leaving deposits instead of an obvious puddle.
What should be checked when selecting this hose?
Compare reference 99710662703, the right-hand position and the vehicle-specific application. The diagram item number varies between models.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99710662703
The product you are viewing cross references to these numbers
- 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 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 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
Fits:
Porsche 987 Boxster
Porsche 987C Cayman
Porsche 997
Click 'Zoom in' for large parts diagram.
Diagram ref no 1
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99710671103
The product you are viewing cross references to these numbers
- 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 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 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
Fits:
Porsche 987 Boxster
Porsche 987C Cayman
Porsche 997
Click 'Zoom in' for large parts diagram.
Diagram ref no 9
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99710675104
The product you are viewing cross references to these numbers
- 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 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 GT2 2007-09
- Porsche 997 MKII GT3 / GT3 RS 2010-11
HVAC Heater Feed Hose – Feed
Restore the reliability of your Porsche's cooling and heating system with this OE Heater Feed Hose.
Fits:
- Porsche 996 C2 3.6L 09/01-2005 (Tiptronic only)
- Porsche 996 C4 3.6L 09/01-2005 (Tiptronic only)
- Porsche 996 C4S 3.6L 09/01-2005 (Tiptronic only)
- Porsche 996 TURBO 2000-05
- 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 GT2 2007-09
- Porsche 997 MKII GT3 / GT3 RS 2010-11
Diagram ref no 17
Designed to meet or exceed original equipment
specifications, this high-quality replacement hose carries hot engine coolant
from the engine to the heater matrix (heater core), enabling the HVAC system to
provide efficient cabin heating, rapid windscreen demisting and consistent
climate control performance.
Manufactured from premium automotive-grade rubber with reinforced construction, this OE Match hose is engineered to withstand the high temperatures, pressures and continual thermal cycling experienced within the Porsche cooling system. Offering excellent fitment and long-term durability, it provides an ideal replacement for ageing or deteriorated original hoses at a competitive price.
Whether you're repairing a coolant leak, refreshing the cooling system or carrying out preventative maintenance, replacing worn heater hoses helps maintain the reliability and efficiency of your Porsche.
What Does the Heater Feed Hose Do?
The heater feed hose forms part of the engine's coolant circuit, carrying heated coolant from the engine to the heater matrix located within the dashboard.
As warm coolant flows through the heater matrix, the
vehicle's blower motor forces air across it before directing the heated air
into the cabin. This allows the system to provide:
- Efficient interior heating
- Rapid windscreen demisting and defrosting
- Consistent climate control performance
- Comfortable cabin temperatures throughout colder months
Although relatively simple in design, the heater feed hose plays a vital role in both passenger comfort and the overall operation of the cooling system.
Why Do Heater Feed Hoses Fail?
Heater hoses operate in one of the harshest environments on the vehicle, continually exposed to high coolant temperatures, pressure fluctuations and engine vibration.
Over many years of service, the rubber gradually
deteriorates due to:
- Constant heating and cooling cycles
- Age-related hardening and loss of flexibility
- Internal degradation caused by coolant additives
- Surface cracking and perishing
- Swelling from contamination
- Fatigue around hose ends and retaining clips
- Abrasion against surrounding engine components
As deterioration progresses, small coolant leaks can develop before eventually leading to hose failure and rapid coolant loss.
When Should the Heater Feed Hose Be Replaced?
Because coolant hoses naturally age over time, Porsche specialists often recommend inspecting them during every major service and replacing them whenever significant cooling system work is undertaken.
Replacement is advised if you notice:
- Visible coolant leaks or staining
- Cracked, brittle or hardened rubber
- Bulging or swollen sections
- Dampness around hose connections
- A sweet coolant smell after driving
- Reduced cabin heating performance
- During engine-out repairs or cooling system refurbishment
- As preventative maintenance on older vehicles
Replacing ageing heater hoses before they fail can help prevent unexpected coolant loss, reduce the risk of engine overheating and avoid costly roadside breakdowns.
Porsche Cooling System & Heater Hoses
The cooling system on your Porsche does far more than regulate engine temperature. It also supplies heated coolant to the HVAC system, ensuring efficient cabin heating, effective windscreen demisting and year-round driving comfort.
As rubber hoses age, they gradually lose their elasticity and structural integrity, making them increasingly susceptible to leaks and sudden failure. Replacing heater hoses as part of routine maintenance is a sensible investment that helps maintain the integrity of the entire cooling system while reducing the risk of overheating caused by coolant loss.
OE Match replacement hoses are manufactured to provide factory-style fitment, dependable performance and excellent value, making them ideal for both routine servicing and complete cooling system overhauls.
Benefits of Replacing the Heater Feed Hose
Restores reliable coolant circulation Maintains efficient cabin heating Improves windscreen demisting performance Reduces the risk of coolant leaks Helps protect against engine overheating OE Match quality with factory-style fitment Ideal for preventative maintenance on ageing vehicles
Whether you're carrying out a routine service, repairing a coolant leak or restoring your Porsche to its original condition, Design911 supplies the trusted parts you need to keep your vehicle performing at its best.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610621275
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 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
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
- 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 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 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 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
Fits:
Porsche 987 Boxster MKI & MKII 2005>>
Porsche 987C Cayman MKI & MKII 2005>>
Porsche 997 Carrera 3.6L / 3.8L 2005-12
Porsche 997 Turbo MKI & MKII 2007>>
Porsche 997 GT3 2007-11
This product supersedes Porsche's old part numbers:
- 99710615203
Click 'Zoom in' for large parts diagram.
Diagram ref no 8.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99710675204
The product you are viewing cross references to these numbers
- 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
Water coolant hose, supply
OE Match coolant supply hose for selected Porsche 997.1 and 997.2 models. This replacement carries coolant along the supply circuit and provides an alternative to the original Porsche component.
Fits:
Porsche 997.1 2005 - 2008
Porsche 997.2 2009 - 2012
Diagram ref no 17
What This Product Does
The hose joins designated connections within the water-cooling supply circuit. Its role is to carry coolant between those connections, supporting circulation and temperature management. OE Match develops replacement components around Porsche applications, with specification review and sample evaluation forming part of its approval process.
Functions
- Carries coolant along the designated supply route.
- Links the relevant cooling-circuit connections.
- Supports a sealed fluid path when properly fitted.
Technical Details
- Brand: OE Match
- Component: coolant supply hose.
- Supplied part reference: 99710674006
- Additional catalogue references: 99710674004 and 99710674005.
Symptoms of Fault
- Wetness or seepage at either connection.
- A falling coolant level or dashboard level alert.
- A sweet smell or deposits near the hose.
- Temperature readings higher than usual.
- Bulging, splits, hardened areas or unusually soft sections.
- Gurgling associated with low coolant or trapped air.
Why Replacement Matters
Repeated heating and cooling, pressure, vibration and contamination can weaken a hose over time. Renew it when inspection confirms deterioration or identifies it as the leak source. A small seep can develop into substantial fluid loss, so investigate recurring level drops rather than relying on repeated top-ups.
During related cooling repairs, inspect adjoining pipes, fittings, retainers and seals. Check the hose routing and connection security, then refill and bleed according to the vehicle-specific procedure.
FAQs
How should a suspected leak be confirmed?
A cooling-system pressure test and inspection of the hose connections can help distinguish hose leakage from nearby component faults.
Can coolant collect without leaving a puddle?
Yes. Fluid may collect on an undertray or evaporate, leaving deposits rather than obvious drips.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99710674006
The product you are viewing cross references to these numbers
- 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 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 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
Fits:
Porsche 987 Boxster MKI 2005-08
Porsche 987 Boxster MKII 2009-12
Porsche 987C Cayman MKI 2006-08
Porsche 987C Cayman MKII 2009-12
Porsche 997 Carrera 3.6L / 3.8L MKI 2005-08 COUPE / CABRIO
Porsche 997 Carrera 3.6L / 3.8L MKII 2009-12 COUPE / CABRIO / TARGA
Porsche 997 TURBO / TURBO S / GT2 / GT2 RS 2007>>
Porsche 997 GT3 2007-11
Click 'Zoom in' for large parts diagram.
Diagram ref no 2
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99710672003
The product you are viewing cross references to these numbers
-
water cooling - 1 - for 997 GT3 M97.76 2007-09 105-05
-
water cooling - 1 - for 997 GT3 / GT3 RS M97.77 2010-11 and 997 GT3 RS 4.0 M97.74 2011 105-06
-
water cooling - 2 - for 997 GT3 M97.76 2007-09 105-10
-
Water cooling - 1 - 997.2 Carrera 2009-12 105-007
-
Water cooling - 2 - (A101,A102) 997.2 Carrera 3.6L / 3.8L 2009-12 105-010
-
Lines heater - 9770 - 997.2 GT2 RS 3.6L 2010-11 105-004
-
Water cooling 1 - A170 - 997.2 Turbo 3.8L 2010-13 105-006
-
Water cooling 1 - 9770 - 997.2 GT2 RS 3.6L 2010-11 105-008
-
Water cooling 2 - A170 - 997.2 Turbo 3.8L 2010-13 105-010
-
Water cooling 2 - 9770 - 997.2 GT2 RS 3.6L 2010-11 105-011
OEMatch Coolant Hoses - Centre Section — Durability, Sealing, Performance
OEMatch centre section coolant hoses for Porsche models circulate coolant between key components to regulate engine temperature and reduce the risk of overheating. These hoses support continuous flow and system pressure in vehicles with mid- or rear-mounted cooling routing, helping maintain reliable thermal control during varied use.
Available Types
- Reinforced rubber centre section hose for standard cooling circuits
- Silicone centre hose for elevated temperature tolerance
- Complete centre pipe assembly with integrated fittings
Understanding OEMatch Coolant Hoses - Centre Section
OEM (Original Equipment Manufacturer) parts are made by the same company that produced your Porsche’s original coolant hoses - centre section. OE (Original Equipment) refers to parts matching original specifications for the coolant hoses - centre section 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 - centre section engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models.
Centre section hoses connect the radiator, water pump and engine across the vehicle centre, ensuring continuous circulation and consistent temperature regulation. OEMatch maintains a Porsche-focused catalogue with over 4,000 part numbers and more than 8,700 OE cross-references to support model coverage.
Benefits Include
- Restored, leak-free coolant circulation
- Improved temperature control and engine protection
- Components selected for heat and pressure resistance in Porsche cooling systems
Why Coolant Hoses - Centre Section Wear and Fail
- Age-related rubber hardening and cracking from heat cycling
- Clamp or joint deterioration leading to leaks
- Chemical degradation from coolant contaminants or abrasion against nearby parts
The Importance of Replacing with OEMatch Coolant Hoses - Centre Section
A weakened or leaking centre section hose can cause coolant loss and temperature instability, increasing the risk of overheating and potential engine damage. Replacing worn hoses as part of routine maintenance helps preserve cooling system integrity, reduces the likelihood of disruptive failures and supports ongoing engine reliability in Porsche models.
Advantages
- Direct-fit replacements engineered to match original dimensions and tolerances
- Made to original-spec dimensions for consistent performance
- Compatible with common mounting points and sealing methods used in Porsche cooling systems
Support & Advice
These items affect safety-critical systems. Installation should be carried out by a qualified technician following model-specific procedures and torque settings. Use calibrated tools and new fasteners where specified. If fitting at home, protect nearby components and verify clamps and seals during reassembly.
