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Thermostat / Temperature Sensor

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DISPLAYING 17 to 24 (of 24 products)
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94810640101
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Water thermostat housing gasket.
porsche

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

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Diagram Ref No 11.

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94810640101
94810640101
249.050

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95510611900
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Water thermostat insert gasket

porsche

Fits:
Porsche 955 Cayenne 3.2L 2004-05

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95510611900
95510611900

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95510611900/1
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Water thermostat insert gasket.

elring

Fits:
Porsche 955 Cayenne 3.2L 2004-05

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Diagram ref no 3

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95510611900
95510611900
002.240

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95510611300
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Water thermostat insert.

porsche

Fits:
Porsche 955 Cayenne 3.2L 2003-06

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Diagram ref no 2

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95510611300
95510611300
4455.80D
8MT 354 778-161

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95510611300/1
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Water thermostat insert.

wahler

Fits:
Porsche 955 Cayenne 3.2L 2003-06

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95510611300
95510611300
4455.80D
8MT 354 778-161

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95510611300/2
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Water thermostat insert.

oematch

Fits:
Porsche 955 Cayenne 3.2L 2003-06

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95510611300
95510611300
4455.80D
8MT 354 778-161

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99610612573/1
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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



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99610612573
99610612570
99610612571
99610612572
99610612573

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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.



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99610612573
99610612570
99610612571
99610612572
99610612573

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DISPLAYING 17 to 24 (of 24 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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