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- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
- Porsche 944S2 3.0L 16V 1989-91
- Porsche 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94
The OE MATCH Heater Hose Supply is a replacement coolant hose designed to maintain reliable coolant circulation within the heating system of selected Porsche 944 and Porsche 968 models.
Fits:- Porsche 944 / 944 S / 944 S2 1987-90
- Porsche 968 1992-95
Diagram Ref No 25
Manufactured to match the original equipment configuration, this heater supply hose connects the heater control valve to the heater circuit, carrying hot engine coolant towards the heater matrix to provide effective cabin heating.
The vehicle's heating system uses heat generated by the engine to warm the passenger compartment. As hot coolant circulates through the heater matrix, the heater blower passes air across it, transferring heat into the cabin.
The heater supply hose provides an essential connection within this system, helping maintain a continuous, leak-free coolant passage between the heater control valve and heater matrix.
Its moulded shape is designed to follow the original hose routing, allowing it to fit correctly within the available engine compartment space without unnecessary strain on the connections.
Over time, original rubber coolant hoses can deteriorate due to repeated exposure to high temperatures, coolant pressure, vibration and natural ageing. The hose material may harden, crack, soften, swell or split, potentially resulting in coolant leakage or restricted flow.
A damaged heater supply hose can cause poor cabin heating, coolant loss and reduced cooling system reliability. If substantial coolant loss is left unresolved, the engine may overheat, potentially leading to expensive mechanical damage.
Replacing a worn or deteriorated heater supply hose with the OE MATCH 94457258702/1 helps restore the original coolant connection, maintain effective heater performance and support the overall reliability of the engine cooling system.
Ideal for Porsche 944 and 968 maintenance, coolant leak repairs, heater system refurbishment and classic Porsche restoration projects.
What This Product Does:The heater supply hose carries heated engine coolant through part of the vehicle's cabin heating circuit.
Its primary functions include:
- Transfers Hot Coolant to the Heater Matrix: Provides a passage for coolant to flow from the heater control valve towards the cabin heater.
- Supports Cabin Heating: Allows engine heat to reach the heater matrix, where it can be transferred to the passenger compartment.
- Maintains Coolant Circuit Integrity: Provides a sealed connection between components of the heater circuit.
- Supports Consistent Heating Performance: Helps maintain adequate coolant circulation when cabin heating is required.
- Accommodates Temperature Changes: Its flexible construction allows for normal thermal expansion and contraction.
- Withstands Cooling System Pressure: Designed for operation within the vehicle's pressurised coolant system.
- Accommodates Engine Compartment Movement: Provides flexibility to help tolerate normal vibration and movement.
- Supports Windscreen Demisting: Helps provide the hot coolant required for effective warm-air demisting and defrosting.
- Maintains Original Hose Routing: Its application-specific shape helps preserve the factory coolant hose arrangement.
- Supports Engine Cooling System Reliability: Helps prevent coolant loss through a deteriorated hose connection.
Symptoms Of Wear Or Failure:
Heater hoses operate under demanding conditions involving continuous contact with hot coolant, fluctuating pressure and repeated heating and cooling cycles.
Over time, these conditions can weaken the rubber and increase the likelihood of leaks or failure.
Common symptoms of a worn or failing heater supply hose include:
- Visible Coolant Leakage: Coolant may drip or seep from the hose body or its connections.
- Falling Coolant Level: The expansion tank may require frequent topping up due to coolant loss.
- Cracked Rubber Surface: Age-related deterioration may cause visible cracking along the hose.
- Hard or Brittle Hose Material: Rubber may lose flexibility and become more susceptible to splitting.
- Swollen or Bulging Hose: Internal deterioration may cause sections of the hose to expand abnormally.
- Unusually Soft or Spongy Areas: The internal reinforcement or rubber structure may have weakened.
- Split or Torn Hose: Severe deterioration can cause a rupture and rapid coolant loss.
- Coolant Residue Around Connections: Dried coolant deposits may indicate a slow leak around the hose ends.
- Sweet Coolant Smell: Escaping antifreeze can produce a distinctive sweet smell around the engine compartment.
- Dampness Around the Heater Circuit: Coolant may collect beneath the hose or around adjacent components.
- Steam from the Engine Compartment: Coolant leaking onto hot components may produce steam.
- Reduced Cabin Heating: Significant coolant loss, trapped air or restricted flow may reduce the amount of heat reaching the heater matrix.
- Fluctuating Heater Temperature: Air entering the cooling system due to leakage may cause inconsistent heater performance.
- Engine Temperature Rising Above Normal: Substantial coolant loss may reduce cooling system effectiveness.
- Hose Collapse or Internal Restriction: A deteriorated hose may become distorted or obstruct normal coolant flow.
- Damage Around Hose Clamps: Overtightened clamps or deteriorated hose ends may cause localised cracking and leakage.
Why Replacement Matters:
Replacing a deteriorated heater supply hose is important for maintaining reliable cabin heating and protecting the engine cooling system from coolant loss.
Key Benefits Of Replacement:
- Restores the Coolant Connection: Replaces damaged rubber to maintain a secure coolant passage between heater components.
- Helps Prevent Coolant Leaks: Reduces the risk of coolant escaping through cracks, splits or weakened hose walls.
- Supports Effective Cabin Heating: Maintains the coolant flow needed for normal heater matrix operation.
- Helps Prevent Engine Overheating: Reduces the risk of coolant loss that could compromise engine temperature regulation.
- Maintains Cooling System Pressure: Helps preserve a properly sealed coolant circuit.
- Improves Reliability: Replaces ageing rubber that may be vulnerable to sudden failure.
- Supports Windscreen Demisting: Helps maintain warm-air availability during cold or damp conditions.
- Reduces the Risk of Unexpected Breakdowns: Preventative replacement can address visible deterioration before a hose ruptures.
- Protects Surrounding Components: Helps prevent coolant from leaking onto nearby electrical or mechanical parts.
- Maintains Original Hose Routing: Application-specific construction helps avoid incorrect hose bends or unnecessary stress.
- Supports Long-Term Cooling System Health: Provides a sound connection within the heating and cooling circuit.
- Ideal for Preventative Maintenance: Particularly useful when servicing other ageing cooling system hoses.
- Suitable for Classic Porsche Restoration: Helps maintain the original heater hose arrangement.
- Cost-Effective Repair: Replacing a worn hose can help avoid more extensive repairs resulting from coolant loss and overheating.
Although the heater supply hose is a relatively simple component, it plays an important role in the vehicle's cooling system.
A small leak may initially appear harmless but can gradually reduce the coolant level. As coolant escapes, air may enter the system, affecting heater performance and potentially reducing the engine's ability to maintain its correct operating temperature.
A severely deteriorated hose can also rupture without warning, leading to rapid coolant loss and possible overheating.
Because the Porsche 944 and 968 rely on a properly functioning liquid cooling system, maintaining the condition of the heater hoses is especially important as these vehicles age.
Replacing a cracked, softened, swollen or leaking hose with the OE MATCH 94457258702/1 helps restore cooling system integrity and supports dependable heating and engine operation.
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- Porsche 970.2 Panamera S V6 Turbo 3.0L 2WD (420Hp) 2014-16
- Porsche 970.2 Panamera S V6 Turbo 3.0L 2WD Executive 2014-16
- Porsche 970.2 Panamera 4S V6 Turbo 3.0L 4WD (420Hp) 2014-16
- Porsche 970.2 Panamera 4S V6 Turbo 3.0L 4WD Executive 2014-16
- Porsche 95B.1 Macan S Petrol 3.0L V6 (340Bhp) 2014-18
- Porsche 95B.1 Macan GTS Petrol 3.0L V6 (360Bhp) 2014-18
- Porsche 95B.1 Macan Turbo 3.6L V6 (400Bhp) 2014-18
- Porsche 95B.2 Macan Petrol 2.0L (245Bhp) 2019-21
- Porsche 95B.2 Macan S Petrol 3.0L V6 (354Bhp) 2019-21
Fits:
Porsche 970 Panamera 3.0L 2014-2016
Porsche 95B Macan V6 Petrol 2014-2018
Porsche 95B.2 Macan 2019*
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7PP121237
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- Porsche 95B.2 Macan Petrol 2.0L (245Bhp) 2019-21
Fits:
Porsche 95B.2 Macan 2.0ltr - 2019 to 2021
For cars with Supplementary Heater - 2019 Model Year Only
Click 'Zoom in' for large parts diagram.
Diagram ref no 1
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95B265340
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- Porsche 955 Cayenne 3.2L V6 2003-06
- Porsche 955 Cayenne S 4.5L V8 2003-06
- Porsche 955 Cayenne Turbo 4.5L 2003-06
- Porsche 955 Cayenne Turbo S 4.5L 2006>>
- 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
- Porsche 9YA Cayenne V6 3.0L Petrol (340Hp) 2018-23
- Porsche 9YA Cayenne Coupe V6 3.0L Petrol (340Hp) 2019-23
- Porsche 9YA Cayenne E-Hybrid V6 3.0L V6 (340Hp) 2018-23
- Porsche 9YA Cayenne Coupe E-Hybrid V6 3.0L (340Hp) 2020-23
- Porsche 9YA Cayenne GTS V8 4.0L Petrol (460Hp) 2020-23
- Porsche 9YA Cayenne Coupe GTS V8 4.0L Petrol (460Hp) 2021-23
- Porsche 9YA Cayenne Turbo V8 4.0L Petrol (550Hp) 2020-23
- Porsche 9YA Cayenne Coupe Turbo V8 4.0L Petrol (550Hp) 2019-23
- Porsche 9YA Cayenne Turbo S E-Hybrid V8 4.0L (550Hp) 2019-23
- Porsche 9YA Cayenne Coupe Turbo S E-Hybrid V8 4.0L (550Hp) 2020-23
- Porsche 9YA Cayenne Coupe Turbo GT V8 4.0L (640Hp) 2021-23
- Porsche 95B.1 Macan S Petrol 3.0L V6 (340Bhp) 2014-18
- Porsche 95B.1 Macan S Diesel 3.0L V6 (258Bhp) 2014-18
- Porsche 95B.1 Macan GTS Petrol 3.0L V6 (360Bhp) 2014-18
- Porsche 95B.1 Macan Turbo 3.6L V6 (400Bhp) 2014-18
- Porsche 95B.2 Macan Petrol 2.0L (245Bhp) 2019-21
- Porsche 95B.2 Macan S Petrol 3.0L V6 (354Bhp) 2019-21
- Porsche 95B.2 Macan GTS Petrol 2.9L V6 (380Bhp) 2019-21
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The OE MATCH HVAC Heater Control Valve is a heating and climate control component designed to regulate the flow of engine coolant through the heater core on compatible Porsche models. This precision-engineered control valve ensures accurate temperature regulation within the passenger compartment by controlling the amount of hot coolant entering the heater matrix.
Fits:
- Porsche 955 Cayenne 3.2L V6 2003-06
- Porsche 955 Cayenne S 4.5L V8 2003-06
- Porsche 955 Cayenne Turbo 4.5L 2003-06
- Porsche 955 Cayenne Turbo S 4.5L 2006>>
- 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
- Porsche 9YA Cayenne V6 3.0L Petrol (340Hp) 2018-23
- Porsche 9YA Cayenne Coupe V6 3.0L Petrol (340Hp) 2019-23
- Porsche 9YA Cayenne E-Hybrid V6 3.0L V6 (340Hp) 2018-23
- Porsche 9YA Cayenne Coupe E-Hybrid V6 3.0L (340Hp) 2020-23
- Porsche 9YA Cayenne GTS V8 4.0L Petrol (460Hp) 2020-23
- Porsche 9YA Cayenne Coupe GTS V8 4.0L Petrol (460Hp) 2021-23
- Porsche 9YA Cayenne Turbo V8 4.0L Petrol (550Hp) 2020-23
- Porsche 9YA Cayenne Coupe Turbo V8 4.0L Petrol (550Hp) 2019-23
- Porsche 9YA Cayenne Turbo S E-Hybrid V8 4.0L (550Hp) 2019-23
- Porsche 9YA Cayenne Coupe Turbo S E-Hybrid V8 4.0L (550Hp) 2020-23
- Porsche 9YA Cayenne Coupe Turbo GT V8 4.0L (640Hp) 2021-23
- Porsche 95B.1 Macan S Petrol 3.0L V6 (340Bhp) 2014-18
- Porsche 95B.1 Macan S Diesel 3.0L V6 (258Bhp) 2014-18
- Porsche 95B.1 Macan GTS Petrol 3.0L V6 (360Bhp) 2014-18
- Porsche 95B.1 Macan Turbo 3.6L V6 (400Bhp) 2014-18
- Porsche 95B.2 Macan Petrol 2.0L (245Bhp) 2019-21
- Porsche 95B.2 Macan S Petrol 3.0L V6 (354Bhp) 2019-21
- Porsche 95B.2 Macan GTS Petrol 2.9L V6 (380Bhp) 2019-21
- Porsche 95B.2 Macan Turbo 2.9L V6 (440Bhp) 2019-21
Diagram Ref No 1
The heater control valve is engineered to withstand continuous exposure to engine coolant, pressure fluctuations, high operating temperatures and repeated thermal cycling. Designed as a replacement, it integrates seamlessly with the vehicle's HVAC and engine cooling systems, providing correct operation and long-term reliability.
What This Product Does:
- Regulates the flow of engine coolant to the heater core.
- Controls cabin heating performance.
- Maintains accurate interior temperature regulation.
- Supports efficient operation of the HVAC system.
- Helps provide rapid cabin warm-up in cold conditions.
- Works with the vehicle's climate control system for consistent comfort.
- Forms an essential part of the vehicle's heating and cooling system.
Symptoms Of Wear Or Failure:
- No cabin heat or insufficient heating.
- Constant hot air from the vents regardless of temperature setting.
- Inconsistent cabin temperature.
- Coolant leaks around the heater valve.
- Low engine coolant level caused by leakage.
- Dampness or coolant residue around the valve.
- Poor climate control performance.
- Heater taking longer than normal to warm the cabin.
- Engine coolant warning due to coolant loss.
- Visible corrosion or damage to the valve body.
Why Replacement Matters:
- The HVAC heater control valve operates continuously as part of the vehicle's climate control system, regulating hot coolant flow whenever the cabin temperature is adjusted. Over time, exposure to hot coolant, pressure changes and repeated operating cycles can cause the internal valve mechanism or seals to wear, seize or leak.
- A faulty heater control valve can prevent the correct amount of coolant from reaching the heater core, resulting in poor cabin heating, inconsistent temperature control or coolant leaks. Continued operation with a leaking valve can lead to coolant loss, reduced engine cooling efficiency and potential engine overheating if left unresolved.
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