Thermostat / Temperature Sensor


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.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99660614002
The product you are viewing cross references to these numbers
- Porsche 996 TURBO 2000-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT3 2007-09
- Porsche 997 MKII GT3 2010-11
- Porsche 997 MKII Turbo 2010-13
- Porsche Carrera GT

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.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99660614002
The product you are viewing cross references to these numbers
- Porsche 996 TURBO 2000-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT3 2007-09
- Porsche 997 MKII GT3 2010-11
- Porsche 997 MKII Turbo 2010-13
- Porsche Carrera GT
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.