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Thermostat / Temperature Sensor

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DISPLAYING 1 to 16 (of 19 products)
1 2
Special Order item
7PP906270
Product Information
Product Information
Change-over valve for water cooling and air intake. 

porsche

Fits:
Porsche 986 Boxster - 1997 to 2004
Porsche 981 Boxster / Cayman - 2012 to 2016
Porsche 718 Boxster / Cayman - 2017 Onwards
Porsche 993 - 1994 to 1997 
Porsche 996 - 1997 to 2005 
Porsche 970 Panamera - 2009 to 2016
Porsche 958 Cayenne - 2010 to 2017

 

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Related, superseded, cross reference or alternative numbers for comparison.

7PP906270
7PP906270
99660512301

The product you are viewing cross references to these numbers
7PP906270/1
Product Information
Product Information
Change-over valve for water cooling and air intake. 

oematch

Fits:
Porsche 986 Boxster - 1997 to 2004
Porsche 981 Boxster / Cayman - 2012 to 2016
Porsche 718 Boxster / Cayman - 2017 Onwards
Porsche 993 - 1994 to 1997 
Porsche 996 - 1997 to 2005 
Porsche 970 Panamera - 2009 to 2016
Porsche 958 Cayenne - 2010 to 2017

 

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Related, superseded, cross reference or alternative numbers for comparison.

7PP906270
7PP906270
99660512301

The product you are viewing cross references to these numbers
Special Order item
99610664162
Product Information
Product Information
Coolant return water hose
This Porsche Genuine OE Coolant Return Water Hose is a factory-engineered cooling system hose designed for the Porsche 911 (996) Carrera 3.4L models. This molded hose forms part of the engine’s water-cooling circuit and is specifically designed to route coolant through the return section of the system.

Fits:
Porsche 996 C2 3.4L 1998 - 2001 MANUAL

Diagram ref no 3

This product supersedes Porsche's old part numbers: 99610664156, 99610664158.

The coolant return hose carries coolant from the engine return line to the main distribution/return pipe within the cooling system. This circulation allows heated coolant to travel back through the system where it can be cooled and recirculated through the engine.

By maintaining steady coolant flow through the engine’s cooling circuit, the hose helps regulate engine temperature and prevent overheating during both normal driving and high-load conditions.

Functions & Technical Role
•  Coolant circulation: Transfers coolant through the return side of the cooling circuit
•  Temperature management: Supports stable engine operating temperature
•  Pressure tolerance: Built to withstand cooling system pressure and temperature fluctuations
•  Flexible connection: Absorbs engine vibration and movement within the cooling system
•  OE precision: Molded to Porsche specifications for exact routing and fitment

Fitment / Position on Car:
•   Fitting position: Engine cooling system
•   Location: Between the engine coolant return line and the main distribution/return pipe
•   System: Engine coolant circulation / radiator cooling circuit

Coolant hoses operate under constant heat, pressure, and vibration, which can cause rubber to deteriorate over time. Aging hoses may crack or weaken, increasing the risk of coolant leaks and potential engine overheating. Replacing worn hoses with genuine Porsche OE components helps maintain the reliability and efficiency of the engine cooling system.


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

99610664162
99610664156
99610664158
99610664162

The product you are viewing cross references to these numbers
99610664162/1
Product Information
Product Information
Coolant return water hose
This OE Match coolant return water hose is a cooling system hose designed for Porsche 911 (996) Carrera 3.4L models with manual transmission produced between 1998 and 2001. This hose forms part of the engine’s coolant return circuit, transferring coolant from the engine return pipe to the main cooling system distribution pipe.

Fits:
Porsche 996 C2 3.4L 1998 - 2001 MANUAL

Diagram ref no 3

This product supersedes Porsche's old part numbers: 99610664156, 99610664158.

The coolant return hose allows coolant to flow back through the engine’s cooling circuit after absorbing heat from the engine. This circulation allows the cooling system to maintain stable engine operating temperatures and prevents overheating.

A properly functioning hose ensures uninterrupted coolant flow and supports efficient temperature control.

Function
  Coolant Return Flow: Transfers coolant from the engine return pipe to the cooling system distribution pipe
  Temperature Regulation: Supports the engine thermostat and radiator system
•  Cooling System Integrity: Maintains sealed coolant circulation under pressure
  Engine Protection: Helps prevent overheating and coolant leaks

Coolant hoses are constantly exposed to heat, pressure and chemical contact from coolant. Over time the rubber can harden, crack or weaken, increasing the risk of coolant leaks. Replacing ageing hoses helps maintain cooling system reliability and protects the engine from overheating or coolant loss.

When to Replace.  Consider replacing the hose when:
   Coolant leaks are visible around hose connections
   The hose shows cracks, swelling or deterioration
   During cooling system overhaul or thermostat service
   As preventative maintenance on higher-mileage engines


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

99610664162
99610664156
99610664158
99610664162

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Special Order item
99660615002
Product Information
Product Information
Oil level sender.

porsche

Fits:
Porsche 986 Boxster 1997-04
Porsche 987 MKI Boxster 2005-08
Porsche 987C MKI Cayman 2005-08
Porsche 996 C2 / C4 / C4S 1998-05
Porsche 997 MKI 2005-08

Click 'Zoom in for large parts diagram.
Diagram ref no 26.

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

99660615002
99660615000
99660615001
99660615002
99970220650

The product you are viewing cross references to these numbers
99660615002/1
Product Information
Product Information
Oil level sender. Measures both oil level and temperature.

oematch

Fits:
Porsche 986 Boxster 1997-04
Porsche 987 MKI Boxster 2005-08
Porsche 987C MKI Cayman 2005-08
Porsche 996 C2 / C4 / C4S 1998-05
Porsche 997 MKI 2005-08

Click 'Zoom in for large parts diagram.
Diagram ref no 26.

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

99660615002
99660615000
99660615001

The product you are viewing cross references to these numbers
Special Order item
99610632651
Product Information
Product Information
Thermostat housing gasket.

porsche

Fits:
Porsche 986 Boxster 1997-04
Porsche 987 Boxster 2005-08
Porsche 987C Cayman 2005-08
Porsche 996 C2 / C4 / C4S 1998-05
Porsche 997 C2 / C4 / C2S / C4S 2005-08

Click 'Zoom in' for large parts diagram.
Diagram Ref No 7.

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

99610632651
99610632650
184.980
184.981
99610632651

The product you are viewing cross references to these numbers
99610632651/1
Product Information
Product Information
Thermostat housing gasket.

elring

Fits:
Porsche 986 Boxster 1997-04
Porsche 987 Boxster 2005-08
Porsche 987C Cayman 2005-08
Porsche 996 C2 / C4 / C4S 1998-05
Porsche 997 C2 / C4 / C2S / C4S 2005-08

Click 'Zoom in' for large parts diagram.
Diagram ref no 7.

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

99610632651
99610632650
184.980
184.981
99610632651

The product you are viewing cross references to these numbers
99610632651/2
Product Information
Product Information
Thermostat housing gasket.

Fits:
Porsche 986 Boxster - 1997 to 2004
Porsche 987 Boxster - 2005 to 2008
Porsche 987C Cayman - 2005 to 2008
Porsche 996 C2 / C4 / C4S - 1998 to 2005
Porsche 997 C2 / C4 / C2S / C4S - 2005 to 2008

Diagram ref no 7

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

99610632651
99610632650
99610632651

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Special Order item
99610601361
Product Information
Product Information
Water thermostat with thermostat insert.

porsche

Gasket not included. Please add separately. Part number 99610601359.

Fits:
Porsche 986 Boxster 1997-2004
Porsche 996 C2 / C4
Porsche 987 Boxster / Boxster S 2005-08
Porsche 987C Cayman / Cayman S 2006-08
Porsche 997 Carrera / S 2005-08 (Coupe / Cabrio)

This product supersedes Porsche's old part numbers:
- 99610612153, 99610612155,

Click 'Zoom in' for large parts diagram.
Diagram Ref No 5.

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

99610601361
99610612153
99610612155
99610601359
996.106.013.59
99610601359
99610601361
99610601360

The product you are viewing cross references to these numbers
Special Order item
99610650256
Product Information
Product Information
Water Hose that fits to the Water Pump part number 99610612155.
This Porsche Genuine OE Water Hose is an original factory coolant hose designed for the engine cooling system of Porsche 911 (996) models. This molded hose connects the cooling circuit components around the water thermostat and water pump, allowing coolant to circulate properly through the engine.

Fits:
Porsche 996 C2 / C4 / C4S 1998 - 2005

Diagram ref no 24.

This product supersedes Porsche's old part numbers:  99610650253, 99610650254

The coolant hose transfers engine coolant between the thermostat housing, water pump, and coolant return pipes, helping regulate engine temperature. By maintaining continuous coolant flow through the engine and cooling circuit, it ensures efficient heat dissipation and prevents overheating during normal driving or high engine loads.

The hose’s molded design allows it to fit precisely within the engine bay routing of the 996 cooling system.

Functions & Technical Role
•  Coolant circulation: Routes coolant between the thermostat and cooling system pipes
  Temperature regulation: Supports stable engine operating temperature
•  Pressure resistance: Designed to withstand cooling system pressure and temperature cycles
  Flexible connection: Absorbs vibration and engine movement within the cooling circuit
  OEM fitment: Molded to Porsche specifications for direct installation

Fitment / Position on Car
  Fitting position: Engine cooling system
  Location: Between the water thermostat housing and water pump / coolant return pipe
  System: Engine coolant circulation system

Coolant hoses operate under constant heat, pressure, and vibration. Over time, rubber can harden or crack, potentially leading to coolant leaks and engine overheating. Replacing worn hoses with genuine Porsche OE components helps maintain proper cooling system performance and prevents costly engine damage.

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

99610650256
99610650253
99610550254
99610550256

The product you are viewing cross references to these numbers
99610650256/1
Product Information
Product Information
Water hose that fits to the water pump part number 99610612155.
This OE Match water hose is a coolant hose designed to connect the engine cooling circuit to the water thermostat housing on Porsche 911 (996) models produced between 1998 and 2005. This hose forms part of the engine’s cooling system, allowing coolant to circulate between the engine and thermostat assembly to regulate operating temperature.

Fits:
Porsche 996 C2 / C4 / C4S 1998 - 2005

Diagram ref no 24

This product supersedes Porsche's old part numbers:  99610650253,  99610650254.

The hose carries coolant between the thermostat housing and the engine’s cooling pipes. This allows the thermostat to regulate coolant flow depending on engine temperature, ensuring the engine warms up efficiently and remains within the correct operating range.

A properly functioning coolant hose is essential to maintain stable engine temperatures and prevent overheating.

Function
Coolant Circulation: Transfers coolant between the thermostat housing and engine cooling pipes
• Temperature Regulation: Supports thermostat operation in controlling engine temperature
• Cooling System Integrity: Maintains sealed coolant flow under pressure
 Engine Protection: Helps prevent overheating and cooling system leaks

Coolant hoses operate under constant heat and pressure. Over time the rubber can become brittle, swell or crack due to thermal cycling and coolant exposure. A deteriorated hose may cause coolant leaks or reduced cooling efficiency, potentially leading to engine overheating. Replacing worn hoses ensures the cooling system maintains proper pressure and flow.

When to Replace.  Consider replacing the hose if you notice:
  Visible cracks, swelling or deterioration in the rubber
  Coolant leaks around the thermostat connection
  Loss of coolant pressure or overheating issues
  During cooling system overhaul or thermostat replacement.


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

99610650256
99610650253
99610550254
99610550256

The product you are viewing cross references to these numbers
Special Order item
99660640501
Product Information
Product Information
Water temperature sensor.

porsche

Fits:
Porsche 986 Boxster 2.5L 1997-99
Porsche 996 >>2001

Click 'Zoom in' for large parts diagram.
Diagram Ref No 29.
99660640501/1
Product Information
Product Information
Water temperature sensor.

oematch

Fits:
Porsche 986 Boxster 2.5L 1997-99
Porsche 996 >>2001

Click 'Zoom in' for large parts diagram.
Diagram Ref No 29.

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

99660640501
99660640501

The product you are viewing cross references to these numbers
99610601361/2
Product Information
Product Information
Water thermostat housing with thermostat insert and gasket.
Standard temperature 83 °C

Fits:
Porsche 986 Boxster 1997 - 2004
Porsche 996 C2 / C4
Porsche 987 Boxster / Boxster S 2005 - 2008
Porsche 987C Cayman / Cayman S 2006 - 2008
Porsche 997 Carrera / S 2005-08 (Coupe / Cabrio)

This product supersedes Porsche's old part numbers:
- 99610612153, 99610612155, 99610601359, 

Diagram Ref No 5.

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

99610601361
99610612153
99610612155
99610601359
99610601361
99610612552
99610612553
99610612554
99610632650
99610632651
99610601360

The product you are viewing cross references to these numbers
99610601361/4
Product Information
Product Information
160F / 71°C Low Temperature  Water Thermostat with Insert  for 986 as well as 996 models and replaces the factory 186F thermostat insert, Porsche part numbers 996 106 125 52 (53). Also fits 987 and 997 models to 2008. Does not fit MY09+ DFI engines.

Fits:
Porsche 986 Boxster 1997 - 2004
Porsche 996 C2, C4
Porsche 987 Boxster 2005>>
Porsche 997 2005 - 2008

Installation recommended only by trained Porsche technician or Porsche service department using genuine Porsche coolant.

Diagram Ref No 5, 6

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

99610601361
99610612153
99610612155
99610601359
99610601361
99610601360

The product you are viewing cross references to these numbers
DISPLAYING 1 to 16 (of 19 products)
1 2
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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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