Thermostat / Temperature Sensor

O-ring (29 x 3.5 mm) – seals the connection between the thermostat housing and the three-way plastic coolant connector that houses the temperature sensor.

Fits:
Porsche 957 Cayenne 3.6L V6 2007-10
Porsche 958 Cayenne 3.6L V6 2011-18

Diagram ref. 14.



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WHT000862

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O-ring thermostat housing 34,5x4x6.



Fits:
Porsche 957 Cayenne 3.6ltr V6 - 2007 to 2010
Porsche 958 Cayenne 3.6ltr V6 - 2010 to 2017

Click 'Zoom in' for large parts diagram.
Diagram ref no 9


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WHT005190

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Thermostat Housing Seal Ring for Porsche 958 Cayenne 3.6L – Essential Cooling System Sealing Component

This thermostat housing seal ring is designed specifically for the Porsche 958 Cayenne 3.6-litre engine, providing a critical seal between the thermostat and its housing. Its role is to maintain system pressure and prevent coolant leaks, ensuring the engine operates within its correct temperature range under all driving conditions.

Fits:

• Porsche 958 Cayenne V6 3.6L Petrol 300Hp 2010-17

Diagram ref no 11

Even though it is a small component, the thermostat housing seal ring plays a major role in cooling system reliability. Over time, heat cycling, coolant exposure and age can cause the seal to harden, flatten or crack—leading to coolant leaks, pressure loss and potential overheating. Replacing the seal during thermostat service or cooling system repairs is essential preventative maintenance.

What the Thermostat Housing Seal Ring Does

This sealing ring:

• Creates a watertight seal between the thermostat and housing
  
• Maintains correct cooling system pressure
• Prevents coolant leaks during engine operation
  
• Supports accurate thermostat function
• Ensures stable engine temperature regulation

A properly sealing thermostat housing is vital for efficient cooling performance.

Why Thermostat Housing Seal Rings Fail

Common causes of failure include:

• Heat cycling, causing the seal to harden or lose elasticity
  
• Coolant chemical exposure, degrading the sealing material
  
• Compression set, where the seal flattens over time
  
• Improper installation, leading to pinching or distortion
  
• Age-related material fatigue, especially on higher-mileage vehicles

Symptoms often include coolant residue around the housing, low coolant warnings or unexplained coolant loss.

Why the Seal Ring Should Be Replaced

Replacing the thermostat housing seal ring provides:

• Restored leak-free cooling system operation
• Correct pressure retention for efficient coolant flow
  
• Prevention of overheating and engine stress
• Reliable sealing after thermostat replacement
• Low-cost protection against expensive cooling repairs

It is strongly recommended to replace the seal ring whenever the thermostat is removed or serviced.

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WHT000863

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Sealing ring coolant connection. 



Fits:
Porsche 957 Cayenne 3.6ltr V6 - 2007 to 2010
Porsche 958 Cayenne 3.6ltr V6 - 2010 to 2017

Click 'Zoom in' for large parts diagram.
Diagram ref no 23


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95510651100

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Thermostat Cover.

The Thermostat Cover is a OE MATCH cooling system component designed to securely house and seal the thermostat within the engine’s cooling circuit. This cover protects the thermostat assembly while ensuring a leak-free connection between the thermostat housing and connected coolant hoses.

Fits:

• Porsche 957 Cayenne 3.6L 2007-10
• Porsche 958 Cayenne V6 3.6L Petrol (300Hp) 2010-17

Diagram Ref No 13

What This Product Does:

• Securing and sealing the thermostat assembly
• Maintaining correct coolant routing through the thermostat housing
• Ensuring proper cooling system pressure
• Preventing coolant leaks at the thermostat connection
• Supporting stable engine temperature regulation

Symptoms Of Wear Or Failure:

• Coolant leaks near the thermostat housing
• Visible cracks or damage to the cover
• Coolant smell from the engine bay
• Low coolant warning light
• Engine overheating due to coolant loss
• Coolant residue around housing connections

Why Replacement Matters:

• Prevent coolant leaks and system pressure loss
• Maintain proper thermostat operation
• Protect the engine from overheating damage
• Restore reliable cooling system performance
• Avoid costly engine repairs caused by heat-related issues

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95510613100

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Thermostat cover. 



Fits:
Porsche 957 Cayenne 3.6ltr V6 - 2007 to 2010
Porsche 958 Cayenne 3.6ltr V6 - 2010 to 2017

Click 'Zoom in' for large parts diagram.
Diagram ref no 13


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95510613100

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Aluminium Upgraded Thermostat Housing 

Upgrade your Porsche 958 Cayenne 3.6 cooling system with this high-performance aluminium thermostat housing, designed to replace the failure-prone OE plastic housing.

The original plastic housing is known to become brittle over time due to repeated heat cycles, often leading to cracks, warping, or failure—resulting in coolant leaks and potential engine overheating.

Fits:

• Porsche 958 Cayenne V6 3.6L Petrol (300Hp) 2010-17       

Diagram ref no 8  

This upgraded version is manufactured from aircraft-quality aluminium, offering superior strength, durability, and resistance to heat-related degradation. The robust alloy construction prevents flange warping and cracking, ensuring long-term reliability and improved cooling system performance.

Engineered for precise fitment and easy installation, this is a direct replacement upgrade designed for enthusiasts and professionals seeking a permanent solution to a common failure point.

Key Features

• Aluminium upgraded thermostat housing
• Designed for Porsche 958 Cayenne 3.6 litre
• Replaces OE plastic housing (95810606000)
• Aircraft-quality alloy construction
• Resistant to heat cycling, warping, and cracking
• Eliminates common coolant leak issues
• Direct replacement – OEM fitment
• Ideal for preventative maintenance and upgrades
• Long-term durability and reliability

Function and Purpose

This upgraded housing improves cooling system reliability.

It helps to:
• Maintain consistent coolant flow
• Prevent coolant leaks caused by plastic failure
• Support thermostat function
• Ensure stable engine operating temperature
• Enhance overall cooling system durability

Why Upgrade from Plastic to Aluminium

The factory plastic housing is a known weak point.

Common issues include:
• Cracking due to heat cycles
• Warping of sealing surfaces
• Coolant leaks
• Premature failure
• Risk of engine overheating

Upgrading to aluminium provides a permanent solution with improved strength and heat resistance.

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95810606000

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Thermostat Housing

High-quality thermostat housing designed specifically for the Porsche 958 Cayenne 3.6ltr engine. This component plays a critical role in regulating engine temperature by housing the thermostat and directing coolant flow through the cooling system.

The thermostat housing ensures efficient coolant circulation, helping the engine reach and maintain optimal operating temperature. Proper function is essential for engine performance, fuel efficiency, and long-term reliability.

Fits:

• Porsche 958 Cayenne V6 3.6L Petrol (300Hp) 2010-17       

Diagram ref no 8  

Manufactured to OEM specifications, this housing provides precise fitment, durability, and dependable performance—ideal for maintenance, repair, or replacement of worn or damaged cooling system components.

Key Features

• Thermostat housing – part number 95810606000
• Designed for Porsche 958 Cayenne 3.6ltr
• Houses and supports thermostat operation
• Ensures correct coolant flow and circulation
• Maintains optimal engine temperature
• OEM-quality fit and construction
• Durable and heat-resistant materials
• Ideal for replacement or maintenance

Function and Purpose

This thermostat housing is essential for cooling system efficiency.

It helps to:
• Direct coolant flow through the engine
• Maintain optimal engine operating temperature
• Support thermostat function
• Prevent overheating or overcooling
• Ensure consistent engine performance

Why Replace Thermostat Housing

Over time, thermostat housings can degrade due to heat and pressure.

Common issues include:
• Coolant leaks
• Cracking or warping of housing
• Poor temperature regulation
• Reduced cooling system efficiency
• Risk of engine overheating

Replacing a worn housing restores cooling system performance and reliability.

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95810606000

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Thermostat With Aluminium Housing And Two O-Rings
The thermostat housing is located at the top of the engine above and behind the water pump.



Fits:
Porsche Cayenne S / GTS / Turbo 2011-18
Porsche 95B Macan S / Turbo 2014-18
Porsche 970 Panamera S / GTS / Turbo 2010-16

Previous numbers:
94810603400, 94810603401, 94810603402, 94810603403

Click 'Zoom in' for large parts diagram.
Diagram ref no 6

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94810603404

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Thermostat Insert with Aluminium Housing and O-Rings

Restore correct engine temperature control with this OE Match Thermostat Insert. The thermostat regulates coolant flow between the engine and radiator. It helps the engine reach operating temperature quickly when cold and then maintains the correct temperature by controlling coolant circulation through the radiator.

Fits:

• Porsche 958 Cayenne S V8 4.8L Petrol (400Hp) 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 970.1 Panamera S V8 4.8L 2009-13
• Porsche 970.1 Panamera 4S V8 4.8L 2009-13
• Porsche 970.1 Panamera GTS V8 4.8L 2011-13
• Porsche 970.1 Panamera Turbo V8 4.8L 2009-13
• Porsche 970.1 Panamera Turbo S V8 4.8L 2009-13
• Porsche 970.2 Panamera S V6 Turbo 3.0L 2WD (420Hp) 2014-16
• Porsche 970.2 Panamera 4S V6 Turbo 3.0L 4WD (420Hp) 2014-16
• Porsche 970.2 Panamera GTS V8 4.8L 4WD (440Hp) 2014-16
• Porsche 970.2 Panamera Turbo V8 4.8L (520Hp) 2014-16
• Porsche 970.2 Panamera Turbo S V8 4.8L 2014-16
• Porsche 95B.1 Macan S Petrol 3.0L V6 (340Bhp) 2014-18
• Porsche 95B.1 Macan Turbo 3.6L V6 (400Bhp) 2014-18

Diagram ref no 6

What Does the Thermostat Insert Do?

When the engine is cold, the thermostat remains closed to restrict coolant flow through the radiator, helping the engine warm up efficiently.

As coolant temperature rises, the thermostat opens and allows coolant to circulate through the radiator where excess heat can be removed.

A correctly operating thermostat helps:

• Maintain the correct engine temperature
• Allow faster engine warm-up
• Regulate coolant flow through the radiator
• Prevent excessive engine temperatures
• Support efficient engine operation
• Maintain consistent cooling system performance

Why Do Thermostats Fail?

Thermostats operate through thousands of heating and cooling cycles and can gradually deteriorate with age.

Common causes include:

• Internal mechanical wear
• Thermostat valve sticking
• Weakening of the temperature-sensitive element
• Coolant contamination or deposits
• Corrosion within the cooling system
• Overheating General age-related deterioration

A thermostat can fail either open or closed. A thermostat stuck open can cause the engine to run too cool, while one stuck closed can restrict coolant circulation and cause overheating.

When Should the Thermostat Be Replaced?

Replacement should be considered if:

• The engine takes unusually long to warm up
• Engine temperature remains below normal
• Engine temperature becomes too high
• Temperature readings fluctuate unexpectedly
• Cabin heater performance is poor
• Diagnostic testing indicates incorrect coolant temperature
• The thermostat is sticking or no longer opening correctly
• Cooling system repairs make replacement advisable

Thermostat replacement is also commonly considered during major cooling system maintenance, particularly on higher-mileage vehicles.

Important Cooling System Checks

Overheating or incorrect engine temperature is not always caused by the thermostat.

The coolant level, water pump, radiator, cooling fans, hoses and cooling system should also be inspected when diagnosing temperature problems.

Any coolant leaks should be repaired and the cooling system correctly filled and bled after thermostat replacement.

Porsche Cayenne, Macan & Panamera Thermostats

The thermostat is a key component of the Porsche engine cooling system, controlling coolant circulation according to engine temperature.

As Cayenne, Macan and Panamera models age, thermostats can become slow to operate or stick partially open or closed. Typical symptoms include slow engine warm-up, low operating temperature, fluctuating temperature readings or overheating.

When diagnosing Porsche cooling system problems, the thermostat should be checked alongside the water pump, radiator, coolant level and other cooling system components.

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94810603404

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Thermostat with Two O-Rings
The thermostat housing is located at the top of the engine above and behind the water pump.

Fits:
Porsche Cayenne S / GTS / Turbo 2011 - 2018
Porsche 95B Macan S / Turbo 2014 - 2018
Porsche 970 Panamera S / GTS / Turbo 2010 - 2016

Previous numbers:
94810603400, 94810603401, 94810603402, 94810603403

Diagram ref no 6

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94810603404

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Water Pump Thermostat Housing With Insert And Gasket, 95°C.
The OE MATCH Water Pump Thermostat Housing with Insert and Gasket is a replacement cooling-system component designed to help regulate coolant flow and maintain the engine within its intended operating temperature range.

Fits:

Diagram Ref No 5

Supplied with a 95°C thermostat insert and gasket, this assembly provides the essential components required to replace a worn, leaking or malfunctioning thermostat housing. The thermostat reacts to coolant temperature, controlling coolant circulation through the engine's cooling system as operating temperature changes.

What This Product Does:

The thermostat housing forms part of the engine's cooling and temperature-control system. It contains the thermostat insert and provides a controlled path for coolant circulation.

When the engine is cold, the thermostat helps regulate coolant flow so that the engine can reach its intended operating temperature efficiently. As coolant temperature rises, the thermostat progressively opens, allowing increased circulation through the cooling system.

The supplied 95°C thermostat insert is calibrated to operate around its specified temperature threshold.

A correctly functioning thermostat assembly helps:

• Regulate engine operating temperature
• Control coolant circulation
• Promote efficient engine warm-up
• Prevent unnecessary overcooling
• Support effective cooling once operating temperature rises
• Maintain consistent engine temperatureSupport efficient engine operation

The gasket provides the necessary seal between mating surfaces, helping prevent coolant leakage from the thermostat housing.

Symptoms Of Wear Or Failure:
Thermostats and housings are subjected to repeated heating and cooling cycles throughout the life of the vehicle. Seals and gaskets can also deteriorate with age and mileage.

Common symptoms of thermostat or housing problems include:

• Coolant leaking around the thermostat housing
  
• Coolant level repeatedly dropping
• Engine running hotter than normal
• Engine overheating
• Temperature gauge readings that fluctuate unexpectedly
• Engine taking unusually long to warm up
• Engine consistently running too cool
• Coolant warning messages
• Visible coolant residue around the housing
• Cracked, distorted or damaged thermostat housing
• Failed or deteriorated gasket
• Poor cabin heater performance in some circumstances

A thermostat that becomes stuck closed can restrict coolant circulation and contribute to overheating. A thermostat stuck open can cause the engine to warm up slowly or operate below its intended temperature.

Why Replacement Matters:
Correct engine temperature is essential for performance, efficiency and long-term reliability.

If the thermostat fails closed or does not open sufficiently, coolant circulation can be restricted as engine temperature rises. This can lead to overheating and, if ignored, potentially serious engine damage.

Excessive engine temperature can place additional stress on:

• Cylinder heads and head gaskets
• Cooling hoses and seals
• Engine oilPlastic cooling-system components
  
• Water pump components
• Other temperature-sensitive engine parts

A thermostat stuck open creates a different problem. Continuous coolant circulation can prevent the engine from reaching its intended operating temperature efficiently, potentially affecting fuel consumption, emissions, heater performance and general engine operation.

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95810603210

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Water pump thermostat housing with insert and gasket.



Fits:
Porsche 958 Cayenne 3.0L DIESEL 2011 (Engine Code 059E)

Click 'Zoom in' for large parts diagram.
Diagram Ref No 5

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95810603210

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Water Pump Thermostat housing with insert.


Fits:
Porsche 958 Cayenne HYBRID 3.0L 2011-16
Porsche 970 Panamera HYBRID 3.0L 2012-16

Click 'Zoom in' for large parts diagram.
Diagram Ref No 5

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95810603202

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Water pump thermostat housing with insert.



Fits:
Porsche 958 Cayenne HYBRID 3.0L 2011-16
Porsche 970 Panamera HYBRID 3.0L 2012-16

Click 'Zoom in' for large parts diagram.
Diagram ref no 5

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95810603202

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Water temperature coolant sensor. 



Fits:

Porsche 718 Boxster - 2017 onwards
Porsche 718 Cayman - 2017 onwards
Porsche 970.1 Panamera V6 models - 2009 to 2013
Porsche 970.2 Panamera - 2014 to 2016
Porsche 992.1 - 2016 to 2019
Porsche 958 Cayenne - 2010 to 2017
Porsche 9YA Cayenne - 2018 to 2023

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