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Thermostat / Temperature Sensor

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PAB121115G
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Thermostat Housing 

Maintain optimum engine temperature and cooling system efficiency with this Thermostat Housing. This genuine replacement component ensures precise thermostat operation and dependable coolant flow throughout the engine.

Fits:

  • Porsche 9YA.2 Cayenne V6 3.0L Petrol (353Hp) 2023>>
  • Porsche 9YA.2 Cayenne Coupe V6 3.0L (353Hp) 2023>>
  • Porsche 9YA.2 Cayenne E-Hybrid V6 3.0L (470Hp) 2023>>
  • Porsche 9YA.2 Cayenne E-Hybrid Coupe V6 3.0L (470Hp) 2023>>
  • Porsche 9YA.2 Cayenne S E-Hybrid V6 3.0L (519Hp) 2023>>
  • Porsche 9YA.2 Cayenne S E-Hybrid Coupe V6 3.0L (519Hp) 2023>>
  • Porsche 976 Panamera V6 2.9L 2023>>
  • Porsche 976 Panamera 4 V6 2.9L 2023>>
  • Porsche 976 Panamera 4 E-Hybrid V6 2.9L 2023>>
  • Porsche 976 Panamera 4S E-Hybrid V6 2.9L 2023>>
  • Porsche 95B.2 Macan S Petrol 3.0L V6 (354Bhp) 2019-21

Diagram ref no 6 

The thermostat housing forms a vital part of the cooling system, securely housing the thermostat while directing coolant between the engine and radiator. Correct operation is essential for maintaining stable engine temperatures, maximising efficiency and protecting the engine from both overheating and excessive warm-up times.

Whether you're replacing a leaking housing, carrying out preventative maintenance or repairing a cooling system fault, choosing a Genuine Porsche component guarantees factory-quality fitment, materials and long-term reliability.

What Does the Thermostat Housing Do?

The thermostat housing performs several important functions within the engine cooling system:

  • Houses and protects the engine thermostat.
  • Directs coolant flow through the engine and radiator.
  • Maintains a sealed cooling circuit
  • Supports efficient engine warm-up.
  • Helps regulate operating temperature.
  • Prevents coolant leaks around the thermostat assembly.
  • Ensures consistent coolant circulation.

Working together with the thermostat, water pump and radiator, the housing helps the engine reach and maintain its ideal operating temperature for maximum performance and efficiency.

Why Replace the Thermostat Housing?

Thermostat housings are continually exposed to heat cycles, coolant pressure and vibration. Over time, the housing and sealing surfaces can deteriorate, increasing the risk of coolant leaks and reduced cooling system efficiency.

Common causes of replacement include:

  • Coolant leaks from the housing.
  • Cracked or damaged housing.
  • Warped sealing surfaces.
  • Age-related material fatigue.
  • Corrosion. Damaged mounting points.
  • Thermostat replacement during cooling system servicing.
  • Preventative maintenance.

Replacing the housing at the same time as the thermostat helps ensure a reliable, leak-free repair.

Symptoms of a Faulty Thermostat Housing

Signs that the thermostat housing may require replacement include:

  • Visible coolant leaks.
  • Low coolant level.
  • Coolant staining around the housing.
  • Engine overheating.
  • Fluctuating engine temperature.
  • Sweet smell of coolant after driving.
  • Steam from the engine bay.
  • Cooling system pressure loss.
  • Warning messages relating to coolant level or engine temperature.

Ignoring coolant leaks can lead to engine overheating and potentially expensive engine damage.

Benefits

  • Restores reliable cooling system performance.
  • Maintains correct engine operating temperature.
  • Helps prevent coolant leaks.
  • Supports optimum fuel efficiency.
  • Protects against overheating.
  • Genuine Porsche quality and fitment.
  • Straightforward installation using original mounting points.
  • Ideal for preventative maintenance and cooling system repairs.

Installation Recommendations

When replacing the thermostat housing, it is advisable to inspect or replace associated cooling system components, including:

  • Coolant hoses.
  • Hose clips.
  • Coolant temperature sensor.
  • Water pump.
  • Drive belt (where applicable).
  • Engine coolant.

Refilling the system with the correct Porsche-approved coolant and bleeding the cooling system correctly will help ensure reliable operation.




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

PAB121115G
PAB121115G

The product you are viewing cross references to these numbers
0PB121688/1
Product Information
Product Information
Thermostat unit o-ring.

Fits:
  • Porsche Boxster 981
  • Porsche Boxster 718
  • Porsche 991.1
  • Porsche 991.
  • Porsche 992.1
  • Porsche 992.2 Carrera
  • Porsche Cayman 981
  • Porsche Cayman 718
  • Porsche 9YA Cayenne
  • Porsche 971.1 Panamera
  • Porsche 971.2 Panamera
  • Porsche 976 Panamera
  • Porsche 95B.2 Macan        

Diagram ref no 5

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

0PB121688
9A712168800
927.770
0PB121688
9A110655900

The product you are viewing cross references to these numbers
PAB121115G/1
Product Information
Product Information

Thermostat with Housing 

Maintain the correct engine operating temperature with this OE Match Thermostat with Housing.. Manufactured to OE specifications, this complete thermostat assembly combines the thermostat and housing into a single replacement unit, providing an efficient and reliable solution for restoring the performance of your Porsche's cooling system.

Fits:

  • Porsche 9YA.2 Cayenne V6 3.0L Petrol (353Hp) 2023>>
  • Porsche 9YA.2 Cayenne Coupe V6 3.0L (353Hp) 2023>>
  • Porsche 9YA.2 Cayenne E-Hybrid V6 3.0L (470Hp) 2023>>
  • Porsche 9YA.2 Cayenne E-Hybrid Coupe V6 3.0L (470Hp) 2023>>
  • Porsche 9YA.2 Cayenne S E-Hybrid V6 3.0L (519Hp) 2023>>
  • Porsche 9YA.2 Cayenne S E-Hybrid Coupe V6 3.0L (519Hp) 2023>>
  • Porsche 976 Panamera V6 2.9L 2023>>
  • Porsche 976 Panamera 4 V6 2.9L 2023>>
  • Porsche 976 Panamera 4 E-Hybrid V6 2.9L 2023>>
  • Porsche 976 Panamera 4S E-Hybrid V6 2.9L 2023>>
  • Porsche 95B.2 Macan S Petrol 3.0L V6 (354Bhp) 2019-21

Diagram ref no 6 

The thermostat is one of the most important components within the engine cooling system. It regulates coolant flow between the engine and radiator, allowing the engine to warm up quickly before maintaining its optimum operating temperature. The integrated housing provides secure mounting, accurate coolant routing and a reliable seal, helping to prevent leaks and ensure efficient coolant circulation.

Whether you're repairing a cooling system fault, replacing a leaking housing or carrying out preventative maintenance, this OE Match thermostat assembly offers factory-quality fitment, dependable performance and excellent value.

What Does the Thermostat Housing Do?

The thermostat housing performs several important functions within the engine cooling system:

  • Houses and protects the engine thermostat.
  • Directs coolant flow through the engine and radiator.
  • Maintains a sealed cooling circuit
  • Supports efficient engine warm-up.
  • Helps regulate operating temperature.
  • Prevents coolant leaks around the thermostat assembly.
  • Ensures consistent coolant circulation.

Working together with the thermostat, water pump and radiator, the housing helps the engine reach and maintain its ideal operating temperature for maximum performance and efficiency.

Why Replace the Thermostat Housing?

Thermostat housings are continually exposed to heat cycles, coolant pressure and vibration. Over time, the housing and sealing surfaces can deteriorate, increasing the risk of coolant leaks and reduced cooling system efficiency.

Common causes of replacement include:

  • Coolant leaks from the housing.
  • Cracked or damaged housing.
  • Warped sealing surfaces.
  • Age-related material fatigue.
  • Corrosion. Damaged mounting points.
  • Thermostat replacement during cooling system servicing.
  • Preventative maintenance.

Replacing the housing at the same time as the thermostat helps ensure a reliable, leak-free repair.

Symptoms of a Faulty Thermostat Housing

Signs that the thermostat housing may require replacement include:

  • Visible coolant leaks.
  • Low coolant level.
  • Coolant staining around the housing.
  • Engine overheating.
  • Fluctuating engine temperature.
  • Sweet smell of coolant after driving.
  • Steam from the engine bay.
  • Cooling system pressure loss.
  • Warning messages relating to coolant level or engine temperature.

Ignoring coolant leaks can lead to engine overheating and potentially expensive engine damage.

Benefits

  • Restores reliable cooling system performance.
  • Maintains correct engine operating temperature.
  • Helps prevent coolant leaks.
  • Supports optimum fuel efficiency.
  • Protects against overheating.
  • Genuine Porsche quality and fitment.
  • Straightforward installation using original mounting points.
  • Ideal for preventative maintenance and cooling system repairs.

Installation Recommendations

When replacing the thermostat housing, it is advisable to inspect or replace associated cooling system components, including:

  • Coolant hoses.
  • Hose clips.
  • Coolant temperature sensor.
  • Water pump.
  • Drive belt (where applicable).
  • Engine coolant.

Refilling the system with the correct Porsche-approved coolant and bleeding the cooling system correctly will help ensure reliable operation.

Why Choose OE Match Cooling System Components?

OE Match cooling system components are manufactured to deliver factory-quality fitment, dependable reliability and long service life. Produced using high-quality materials and precision manufacturing techniques, this thermostat with housing provides an excellent alternative to the original component while maintaining the cooling system performance expected from your Porsche. It is an ideal choice for preventative maintenance, cooling system repairs and professional workshop installations




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

PAB121115G
PAB121115G

The product you are viewing cross references to these numbers
DISPLAYING 1 to 3 (of 3 products)
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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