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Porsche // Macan (95B) MK1 (2014-2018) // 95B.1 Macan Turbo 3.6L V6 (400Bhp) 2014-18
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- 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 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
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- Porsche 997 MKII Carrera C4 3.6L 2009-12
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- Porsche 997 MKII GT2 RS 2011-13
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- Porsche 991.1 Carrera C2S / GTS 3.8L (400/430 Bhp) 2012-16
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- 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 GT3 4.0L (500 Bhp) / GT3 RS 4.0L (520 Bhp) 2017-19
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- 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
Fits:
Porsche 987.2 Boxster 2009-12
Porsche 981 Boxster 2012-16
Porsche 981 Boxster Spyder 2016
Porsche 987.2 Cayman 2009-12
Porsche 981C Cayman 2014-16
Porsche 981 Cayman GT4 2016
Porsche 997.2 Carrera / Turbo 2009-12
Porsche 991.1 Carrera / Turbo 2013-16
Porsche 991.2 Carrera / Turbo 2017>>
Porsche 991 GT3 / GT3 RS / R 2014-17
Click 'Zoom in' for large parts diagram.
Diagram ref no 14
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- Porsche 958 Cayenne GTS V8 4.8L Petrol (400Hp) 2010-17
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- Porsche 970.1 Panamera 4 V6 3.6L 4WD 2009-13
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- Porsche 970.1 Panamera GTS V8 4.8L 2011-13
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- Porsche 970.1 Panamera Turbo S V8 4.8L 2009-13
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- Porsche 970.2 Panamera 4 V6 3.6L 4WD (310Hp) 2014-16
- 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 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 V8 Executive 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 GTS Petrol 3.0L V6 (360Bhp) 2014-18
- Porsche 95B.1 Macan Turbo 3.6L V6 (400Bhp) 2014-18
Fits:
Porsche 957 Cayenne S / GTS / Turbo 2007-10
Porsche 958 Cayenne / S / GTS / Turbo 2011-18
Porsche 970 Panamera / S / GTS / Turbo 2010-16
Porsche 95B Macan S / Turbo 2014-18
Click 'Zoom in' for large parts diagram.
Diagram ref no 2
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- Porsche 970.1 Panamera Turbo V8 4.8L 2009-13
- Porsche 970.1 Panamera Turbo S V8 4.8L 2009-13
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- Porsche 970.2 Panamera Turbo S V8 4.8L 2014-16
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- Porsche 95B.1 Macan Turbo 3.6L V6 (400Bhp) 2014-18
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
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Diagram ref no 6
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- Porsche 970.1 Panamera 4S V8 4.8L 2009-13
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- Porsche 970.1 Panamera Turbo V8 4.8L 2009-13
- Porsche 970.1 Panamera Turbo S V8 4.8L 2009-13
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- Porsche 970.2 Panamera Turbo S V8 4.8L 2014-16
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- Porsche 95B.1 Macan Turbo 3.6L V6 (400Bhp) 2014-18
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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- 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 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 V6 3.6L 2WD 2009-13
- Porsche 970.1 Panamera 4 V6 3.6L 4WD 2009-13
- 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 V6 3.6L 2WD (310Hp) 2014-16
- Porsche 970.2 Panamera 4 V6 3.6L 4WD (310Hp) 2014-16
- 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 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 V8 Executive 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 GTS Petrol 3.0L V6 (360Bhp) 2014-18
- Porsche 95B.1 Macan Turbo 3.6L V6 (400Bhp) 2014-18
Fits:
Porsche 957 Cayenne S / GTS / Turbo 2007-10
Porsche 958 Cayenne / S / GTS / Turbo 2011-18
Porsche 970 Panamera / S / GTS / Turbo 2010-16
Porsche 95B Macan S / Turbo 2014-18
Click 'Zoom in' for large parts diagram.
Diagram ref no 2
Related reference numbers
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