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Thermostat / Temperature Sensor

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DISPLAYING 1 to 9 (of 9 products)
Special Order item
99660641000
Product Information
Product Information
Coolant temperature sensor. 

(*on Porsche 996 Turbo there is also an additional of same the sensor used for Oil temperature)

Fits:
Porsche 986 Boxster 2.7L & 3.2L - for Coolant temperature
Porsche 996 Carrera 3.6L - for Coolant temperature
Porsche 996 Turbo - for Coolant & Oil temperature*
Porsche 996 GT3 - for Coolant temperature
Porsche 997 2005-08 -for Coolant temperature
Porsche 997 GT3 - for Coolant temperature
Porsche 955 Cayenne S & Turbo - Coolant temperature

Diagram Ref No 29.



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Related, superseded, cross reference or alternative numbers for comparison.

99660641000
99660641000
847603076908

The product you are viewing cross references to these numbers
99660641000/1
Product Information
Product Information
Coolant temperature sensor. 

(*on Porsche 996 Turbo there is also an additional of same the sensor used for Oil temperature)

Fits:
Porsche 986 Boxster 2.7L, 3.2L - for Coolant temperature
Porsche 996 Carrera 3.6L - for Coolant temperature
Porsche 996 Turbo - for Coolant & Oil temperature*
Porsche 996 GT3 - for Coolant temperature
Porsche 997 2005-08 -for Coolant temperature
Porsche 997 GT3 - for Coolant temperature
Porsche 955 Cayenne S & Turbo - Coolant temperature

Diagram ref no 29

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Related, superseded, cross reference or alternative numbers for comparison.

99660641000
99660641000
847603076908

The product you are viewing cross references to these numbers
Special Order item
94860620301
Product Information
Product Information
Oil pressure switch. Located on the oil cooler bracket.

porsche

Fits:
Porsche 955 Cayenne S 4.5L 2003-06
Porsche 955 Cayenne TURBO 4.5L 2003-06

Click 'Zoom in' for large parts diagram.
Diagram ref no. 8

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Related, superseded, cross reference or alternative numbers for comparison.

94860620301
94860620301
94860620300
108 890
6ZL 008 280-031
6ZL008280031

The product you are viewing cross references to these numbers
94860620301/1
Product Information
Product Information
Oil pressure switch. Located on the oil cooler bracket.

oematch

Fits:
Porsche 955 Cayenne S 4.5L 2003-06
Porsche 955 Cayenne TURBO 4.5L 2003-06

Click 'Zoom in' for large parts diagram.
Diagram ref no. 8

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

94860620301
108 890
108890
94860620301
94860620300
6ZL 008 280-031
6ZL008280031

The product you are viewing cross references to these numbers
94860620301/2
Product Information
Product Information
Oil pressure switch. Located on the oil cooler bracket.

hella

Fits:
Porsche 955 Cayenne S 4.5L 2003-06
Porsche 955 Cayenne TURBO 4.5L 2003-06

Click 'Zoom in' for large parts diagram.
Diagram ref no. 8

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

94860620301
94860620301
94860620300
108 890
6ZL 008 280-031
6ZL008280031

The product you are viewing cross references to these numbers
Special Order item
94810612303
Product Information
Product Information
Water thermostat gasket.
porsche

Fits:
Porsche 955 Cayenne S 4.5L V8
Porsche 955 Cayenne Turbo 4.5L

Click 'Zoom in' for large parts diagram.
Diagram Ref No 9.

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

94810612303
94810612303
877.761

The product you are viewing cross references to these numbers
94810612303/1
Product Information
Product Information
Water thermostat gasket.

elring

Fits:
Porsche 955 Cayenne S 4.5L V8
Porsche 955 Cayenne Turbo 4.5L

Click 'Zoom in' for large parts diagram.
Diagram Ref No 9.

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

94810612303
94810612303
877.761

The product you are viewing cross references to these numbers
Special Order item
94810640101
Product Information
Product Information
Water thermostat housing gasket.
porsche

Fits:
Porsche 955 Cayenne S 4.5L V8 2003-06
Porsche 955 Cayenne Turbo 4.5L 2003-06

Click 'Zoom in' for large parts diagram.
Diagram Ref No 11.

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

94810640101
94810640101
249.050

The product you are viewing cross references to these numbers
Special Order item
99610612573
Product Information
Product Information
Water Thermostat insert

porsche

Fits:
Porsche 996 Turbo

Porsche 997.2 Turbo
Porsche 997.2 GT3  

Porsche 955 Cayenne S / Turbo 4.8L


Click picture for large parts diagram.
Diagram Ref No 6.



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

99610612573
99610612570
99610612571

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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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