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Porsche > 997 (911) MK2 2009-2012 > 997 MKII GT3 / GT3 RS 2010-11 > Engine Cooling >

Thermostat / Temperature Sensor

Thermostat / Temperature Sensor

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DISPLAYING 1 to 9 (of 9 products)
Coolant pipe seal. Porsche Boxster / Cayman / 991 / 992 - 9A110621500, 0PB121437
2
Coolant pipe seal. Porsche Boxster / Cayman / 991 / 992
Special Order item
0PB121437
Product Information
Product Information
Coolant pipe seal. Pipe to Water Pump & Thermostat Housing.

porsche

Fits:
Porsche 987.2 Boxster 2009-12
Porsche 981 Boxster 2012-16
Porsche 981 Boxster Spyder 2016
Porsche 982 Boxster GTS 4.0 2019>>
Porsche 982 Boxster Spyder 2019>>
Porsche 987C Cayman 2009-12
Porsche 981C Cayman 2014-16
Porsche 981C Cayman GT4
Porsche 982C Cayman GTS 4.0L 2019>>
Porsche 982C Cayman GT4 2019>>
Porsche 997.2 Carrera 2009-12
Porsche 997.2 Turbo 2010-13
Porsche 991.1 Carrera 2012-16
Porsche 991.2 Carrera 2017-19
Porsche 991 Turbo 2014-20
Porsche 991 GT3 1014>>
Porsche 992.1 Carrera 2020>>
Porsche 992 Turbo 2020>>

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Diagram ref no 12

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0PB121437
9A110621500
0PB121437

The product you are viewing cross references to these numbers
Coolant pipe seal. Porsche Boxster / Cayman / 991 / 992 - 9A110621500, 0PB121437, 273.760
2
Coolant pipe seal. Porsche Boxster / Cayman / 991 / 992
0PB121437/1
Product Information
Product Information
Coolant pipe seal. Pipe to Water Pump & Thermostat Housing.

elring

Fits:
Porsche 987.2 Boxster 2009-12
Porsche 981 Boxster 2012-16
Porsche 981 Boxster Spyder 2016
Porsche 982 Boxster GTS 4.0 2019>>
Porsche 982 Boxster Spyder 2019>>
Porsche 987C Cayman 2009-12
Porsche 981C Cayman 2014-16
Porsche 981C Cayman GT4
Porsche 982C Cayman GTS 4.0L 2019>>
Porsche 982C Cayman GT4 2019>>
Porsche 997.2 Carrera 2009-12
Porsche 997.2 Turbo 2010-13
Porsche 991.1 Carrera 2012-16
Porsche 991.2 Carrera 2017-19
Porsche 991 Turbo 2014-20
Porsche 991 GT3 1014>>
Porsche 992.1 Carrera 2020>>
Porsche 992 Turbo 2020>>

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Diagram ref no 12

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

0PB121437
9A110621500
0PB121437
273.760

The product you are viewing cross references to these numbers
Coolant Thermostat Housing. Porsche 996 Turbo / 997 Turbo / GT3 - 99610612172, 99610612171
2
Coolant Thermostat Housing. Porsche 996 Turbo / 997 Turbo / GT3
Special Order item
99610612172
Product Information
Product Information
Coolant Thermostat Housing.
porsche

Fits:
Porsche 996 Turbo / GT2 2001-05
Porsche 996 GT3 / GT3 RS 2000-05
Porsche 997 Turbo / GT2 / GT2 RS 2007-11
Porsche 997 GT3 2007-09

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Diagram ref no 9

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99610612172
99610612172
99610612171

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Oil level and oil temperature sensor. Porsche Boxster 986 / Boxster 987 / Cayman 987C / 997 / 996 - 99660614000, 99660614001, 99660614002
2
Oil level and oil temperature sensor. Porsche Boxster 986 / Boxster 987 / Cayman 987C / 997 / 996
Special Order item
99660614002
Product Information
Product Information
Oil level & oil temperature sensor

porsche

Fits:
Porsche 996 Turbo 2001-05
Porsche 997 Turbo MKI & MKII 2007>>
Porsche Carrera GT 2004-06
Porsche 996 GT3 3.6L 2000-05
Porsche 997 GT3 3.6L 2007-09
Porsche 997 GT3 3.8L / 4.0L 2010>>

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Diagram Ref No 15.

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99660614002
99660614000
99660614001
99660614002

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Oil level and oil temperature sensor. Porsche Boxster 986 / Boxster 987 / Cayman 987C / 997 / 996 - 99660614000, 99660614001, 99660614002
2
Oil level and oil temperature sensor. Porsche Boxster 986 / Boxster 987 / Cayman 987C / 997 / 996
99660614002/1
Product Information
Product Information
Oil level & oil temperature sensor.

oematch

Fits:
Porsche 996 Turbo 2001-05
Porsche 997 Turbo MKI & MKII 2007>>
Porsche Carrera GT 2004-06
Porsche 996 GT3 3.6L 2000-05
Porsche 997 GT3 3.6L 2007-09
Porsche 997 GT3 3.8L / 4.0L 2010>>

Click 'Zoom in' for large parts diagram.
Diagram Ref No 15.

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99660614002
99660614000
99660614001
99660614002

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Water pump thermostat insert. Porsche 997 GT3 3.8L / 4.0L - 9A110622590, 9GT121113
5
Water pump thermostat insert. Porsche 997 GT3 3.8L / 4.0L
Special Order item
9GT121113
Product Information
Product Information
Water pump thermostat insert.

Fits:
Porsche 997 GT3 3.8L 2009 - 2011
Porsche 997 GT3 4.0L 2010 - 2011

Diagram Ref No 8

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9GT121113
9A110622590
9GT121113

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Water Pump Thermostat Insert. Porsche 997 GT3 3.8L / 4.0L - 9A110622590, 9GT121113 - 411678.03.81D70
2
Water Pump Thermostat Insert. Porsche 997 GT3 3.8L / 4.0L
9GT121113/1
Product Information
Product Information
Water Pump Thermostat Insert.

The Wahler Water Pump Thermostat Insert is a Porsche 997 GT3 cooling system component designed to regulate coolant flow through the engine and radiator system. Installed within the thermostat or water pump housing, this insert opens and closes at specific temperatures to ensure the engine maintains its ideal operating range for efficiency, performance, and reliability.

Fits:

  • Porsche 997 MK1 GT3 2007-09
  • Porsche 997 MKII GT3 2010-11 

Diagram Ref No 8 

What This Product Does:
  • Regulates coolant circulation through the engine cooling system
  • Maintains optimal engine operating temperature
  • Controls engine warm-up and cooling efficiency
  • Works with the water pump and radiator to stabilise temperatures
  • Helps prevent overheating and overcooling
  • Supports fuel efficiency, emissions control, and engine performance

Symptoms Of Wear Or Failure:
  • Engine overheating Engine running too cool or slow to reach operating temperature
  • Fluctuating temperature gauge readings
  • Poor cabin heater performance
  • Coolant leaks around the thermostat housing
  • Reduced fuel efficiency caused by incorrect engine temperature
  • Check engine light related to cooling system faults  

Why Replacement Matters:
  • Restores proper coolant flow and temperature regulation
  • Prevents overheating and potential engine damage
  • Improves engine efficiency and fuel economy
  • Ensures reliable heating and climate control performance
  • Protects cooling system components from excessive stress and wear
  • Maintains long-term engine reliability and performance



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

9GT121113
9A110622590
9GT121113

The product you are viewing cross references to these numbers
Water Thermostat Insert. Porsche 996 Turbo / 997 TT & GT3 / 955 Cayenne - 99610612570, 99610612571, 99610612572, 99610612573 - 7307.04.83D70
2
Water Thermostat Insert. Porsche 996 Turbo / 997 TT & GT3 / 955 Cayenne
99610612573/1
Product Information
Product Information
Water Thermostat Insert.

This Wahler Water Thermostat Insert is a Porsche 996 Turbo / 997 TT & GT3 / 955 Cayenne cooling system component designed to regulate coolant flow and maintain the engine at its optimal operating temperature. Installed within the thermostat housing, this insert automatically opens and closes according to coolant temperature, controlling circulation between the engine and radiator for efficient thermal management.

Fits:

  • Porsche 996 TURBO 2000-05
  • Porsche 997 MK1 GT3 2007-09
  • Porsche 997 MKII GT3 2010-11
  • Porsche 997 MKII Turbo 2010-13
  • Porsche 997 MKII GT2 RS 2011-13
  • 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>>  

Diagram Ref No 7

What This Product Does:
  • Regulates coolant flow through the cooling system
  • Maintains optimal engine operating temperature
  • Controls engine warm-up and cooling efficiency
  • Helps prevent overheating and overcooling
  • Supports fuel efficiency, emissions control, and engine performance
  • Works with the radiator and water pump to maintain stable temperatures  

Symptoms Of Wear Or Failure:
  • Engine overheating Engine running too cool or taking too long to warm up
  • Fluctuating temperature gauge readings
  • Poor cabin heater performance
  • Coolant leaks near the thermostat housing
  • Reduced fuel efficiency caused by incorrect operating temperature
  • Check engine light related to cooling system faults  

Why Replacement Matters:
  • Restores proper coolant circulation and temperature regulation
  • Prevents overheating and potential engine damage
  • Improves engine efficiency and fuel economy
  • Ensures reliable heater and climate control operation
  • Protects cooling system components from excessive stress and wear
  • Maintains long-term engine reliability and performance



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99610612573
99610612570
99610612571
99610612572
99610612573

The product you are viewing cross references to these numbers
Water Thermostat Porsche 996 Turbo / 997 TT & GT3 / 955 Cayenne - 99610612570, 99610612571, 99610612572, 99610612573
4
Water Thermostat Porsche 996 Turbo / 997 TT & GT3 / 955 Cayenne
Special Order item
99610612573
Product Information
Product Information
Water Thermostat insert

Fits:
Porsche 996 Turbo

Porsche 997.2 Turbo
Porsche 997.2 GT3  
Porsche 955 Cayenne S / Turbo 4.8L


Diagram Ref No 6.



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99610612573
99610612570
99610612571
99610612572
99610612573

The product you are viewing cross references to these numbers
DISPLAYING 1 to 9 (of 9 products)
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About Thermostat / Temperature Sensor

Engine Thermostats & Temperature Sensors – Precision Cooling Control for Porsche Performance

Engine thermostats and temperature sensors are essential components in your Porsche’s cooling system. Together, they regulate and monitor engine temperature to ensure optimal performance, efficiency, and reliability. The thermostat controls coolant flow through the radiator, while the temperature sensor communicates vital data to the vehicle’s ECU - helping to maintain the perfect balance between power and protection.

At Design911, we supply a wide range of genuine and high-quality thermostats and temperature sensors for Porsche models including transaxle cars, 911, Boxster, Cayman, Cayenne, Macan, and Panamera. Each part is engineered to precise standards for seamless integration, fast response, and long-lasting accuracy - ensuring your Porsche performs at its peak in all conditions.

What Do Engine Thermostats & Temperature Sensors Do?

These components work hand-in-hand to manage and monitor your Porsche’s engine temperature:

  • Thermostat: Opens and closes to regulate coolant flow between the engine and radiator.
  • Temperature Sensor: Measures coolant or cylinder head temperature and sends data to the ECU to control fans, fuel mixture, and performance parameters.
  • Together: They maintain optimal operating temperatures, prevent overheating, and ensure efficient combustion and emissions control.

Without a properly functioning thermostat or temperature sensor, your engine can overheat, run inefficiently, or suffer from poor fuel economy.

Why Do Thermostats & Temperature Sensors Fail?

These components operate under constant thermal stress and can degrade over time. Common causes of failure include:

  • Thermostat sticking open or closed due to corrosion or wear.
  • Sensor degradation from prolonged exposure to coolant and heat.
  • Electrical faults or corrosion in wiring and connectors.
  • Contamination from old or incorrect coolant types.
  • Age-related fatigue causing inaccurate readings or slow response.

Symptoms of failure include fluctuating engine temperatures, warning lights, poor heating performance, or inconsistent fuel economy.

Why Replace Faulty Thermostats & Temperature Sensors?

A malfunctioning thermostat or temperature sensor can severely impact cooling efficiency and engine safety. Replacing worn or faulty parts restores accurate temperature control and helps prevent costly engine damage.

Benefits of replacement include:

  • Stable engine operating temperature.
  • Improved performance and fuel efficiency.
  • Prevention of overheating or over-cooling.
  • Manufacturer-quality construction for accuracy and durability.

All thermostats and sensors in this range are built to meet or exceed exacting standards, offering precise calibration, corrosion-resistant materials, and reliable long-term operation.

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