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Thermostat / Temperature Sensor

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DISPLAYING 1 to 16 (of 34 products)
1 2 3
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Related, superseded, cross reference or alternative numbers for comparison.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Related, superseded, cross reference or alternative numbers for comparison.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
99610674110
Product Information
Product Information
Coolant return water hose.

porsche

Fits:
Porsche 996 C4 3.4L 1998-01 MANUAL

This product supersedes Porsche's old part numbers:
- 99610674104
- 99610674106

Click 'Zoom in' for large parts diagram.
Diagram ref no 3

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Related, superseded, cross reference or alternative numbers for comparison.

99610674110
99610674110
1614300100
99610674106

The product you are viewing cross references to these numbers
99610674110/1
Product Information
Product Information
Coolant return water hose.

oematch

Fits:
Porsche 996 C4 3.4L 1998-01 MANUAL

This product supersedes Porsche's old part numbers:
- 99610674104
- 99610674106

Click 'Zoom in' for large parts diagram.
Diagram ref no 3

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Related, superseded, cross reference or alternative numbers for comparison.

99610674110
99610674110
99610674106
99610674104

The product you are viewing cross references to these numbers
Special Order item
99610674111
Product Information
Product Information
Coolant return water hose.

Fits:
Porsche 996 C4 3.4L 1998-01 TIPTRONIC

This product supersedes Porsche's old part numbers:
- 99610674107

Diagram ref no 3

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Related, superseded, cross reference or alternative numbers for comparison.

99610674111
99610674107
99610674111

The product you are viewing cross references to these numbers
Special Order item
99610688808
Product Information
Product Information
Coolant return water hose. RETURN

porsche

Fits:
Porsche 996 C4 3.6L 2002>> MANUAL

This product supersedes Porsche's old part numbers:
- 99610688802
- 99610688806

Click 'Zoom in' for large parts diagram.
Diagram ref no 3

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Related, superseded, cross reference or alternative numbers for comparison.

99610688808
99610688808
99610688806
99610688802

The product you are viewing cross references to these numbers
99610688808/1
Product Information
Product Information
Coolant return water hose. RETURN

Fits:
Porsche 996 C4 3.6L 2002>> MANUAL

This product supersedes Porsche's old part numbers:
- 99610688802
- 99610688806

Click 'Zoom in' for large parts diagram.
Diagram ref no 3

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

99610688808
99610688808
99610688806
99610688802

The product you are viewing cross references to these numbers
Special Order item
99610674006
Product Information
Product Information
Coolant supply water hose.
This Porsche Genuine OE Coolant Supply Water Hose is an original-equipment cooling system hose designed specifically for the Porsche 911 (996) Carrera 4 with the 3.4 L engine. Manufactured to Porsche’s factory specifications, this hose provides the exact fit, material quality, and durability required to maintain reliable coolant circulation within the engine cooling system.

Fits:
Porsche 996 C4 3.4L 1998 - 2001

Diagram ref no 1

This genuine Porsche hose replaces earlier part numbers 99610674003 and 99610674004, ensuring compatibility with the original cooling system design used in early 996 Carrera 4 models.

The coolant supply water hose carries engine coolant between key cooling system components, helping transport hot coolant from the engine to the radiator or distribution pipes where heat is dissipated. By maintaining steady coolant flow, it helps regulate engine temperature and prevents overheating.

A correctly functioning coolant hose ensures the cooling system maintains proper pressure and flow, allowing the engine to operate within its designed temperature range even under high load or spirited driving conditions.

Functions & Technical Role
  Coolant transfer: Moves coolant between the engine and the main cooling supply pipes
  Temperature regulation: Supports the cooling system in maintaining optimal engine operating temperature
  Pressure resistance: Designed to withstand high coolant pressure and temperature cycles
  Durable construction: Manufactured from heat- and ozone-resistant rubber compounds for long service life
  OEM precision fit: Exact hose shape and connections to match Porsche’s original cooling layout

Fitment / Position on Car
  Installed on: Engine cooling system
  Location: Between the rear coolant supply pipe and the main distribution pipe / radiator supply line
  Function: Forms part of the primary coolant circulation circuit between engine and cooling components.

Coolant hoses are exposed to constant heat, pressure, and vibration. Over time they can harden, crack, or leak, which may lead to coolant loss and potential engine overheating. Replacing worn hoses with genuine Porsche OE parts ensures the correct material quality, fitment, and durability required to maintain the performance and reliability of the Porsche cooling system.

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

99610674006
99610674003
99610674004
99610674006

The product you are viewing cross references to these numbers
99610674006/1
Product Information
Product Information
Coolant supply water hose.
This OE Match coolant supply water hose is a direct-fit replacement hose designed for the Porsche 996 Carrera 4 (1998–2001) with the 3.4L engine. Manufactured to match the original Porsche part in shape, material and durability, this hose ensures reliable coolant flow within the engine’s cooling system.

Fits:
Porsche 996 C4 3.4L 1998 - 2001

Diagram ref no 1

This product supersedes Porsche's old part numbers:  99610674003, 99610674004

This coolant supply hose forms part of the engine cooling system in the Porsche 996. It connects key cooling system components and allows coolant to circulate between the engine and cooling circuit, helping maintain the correct operating temperature.

The OE Match hose replicates the original hose design with the correct bends, diameter and reinforced rubber construction to ensure proper fitment and long-term reliability.

The hose carries coolant through the engine cooling circuit, allowing the radiator and thermostat system to regulate engine temperature. Proper coolant circulation prevents overheating and ensures the engine operates within its designed temperature range.

Replacing old or deteriorated hoses helps maintain efficient cooling system performance and prevents coolant leaks that could lead to engine damage.

Function
• Coolant Circulation: Transfers coolant through the engine cooling system
  Temperature Regulation: Supports stable engine operating temperature
  Leak Prevention: Reinforced rubber construction ensures secure coolant flow

Coolant hoses are exposed to heat, pressure and coolant chemicals over time, which can cause the rubber to harden, crack or weaken. A failing hose may lead to coolant leaks or sudden rupture, potentially resulting in engine overheating. Replacing ageing hoses ensures reliable coolant circulation and protects the engine from temperature-related damage.

Consider replacing the coolant hose if you notice:
   Coolant leaks around hose connections
   Cracked or brittle rubber hose material
   Swelling or soft spots in the hose
   During cooling system servicing or preventative maintenance

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

99610674006
99610674003
99610674004
99610674006

The product you are viewing cross references to these numbers
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
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

Click 'Zoom in' for large parts diagram.
Diagram ref no 9

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

99610612172
99610612172
99610612171

The product you are viewing cross references to these numbers
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>>

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

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

99660614002
99660614000
99660614001
99660614002

The product you are viewing cross references to these numbers
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.

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

99660614002
99660614000
99660614001
99660614002

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DISPLAYING 1 to 16 (of 34 products)
1 2 3
Also found on these pages
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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