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OEM Thermostats & Parts

78121113F - : Engine Coolant Thermostat for Audi Image

Engine Coolant Thermostat

4.2L. 2.8L v6. From Chassis/VIN 8D-X-315 001. 87 Degrees C. 2.7L v6. To Chassis/VIN #4B-X-160 000. 87 Degrees C. 3.7L. From Chassis/VIN...
Discontinued
6B121111K - : Engine Coolant Thermostat Kit for Audi Image

Engine Coolant Thermostat Kit

Incl.Gasket,Housing and Thermostat. 1.8L. To 5400000. Cabriolet A4.
Discontinued
PAB121115D - : Engine Coolant Thermostat Kit for Porsche Image

Engine Coolant Thermostat Kit

Porsche PAB-121-115-D
Incl.Housing and Thermostat. Cayenne. 4.0L, without e-hybrid, turbo gt.
Discontinued
79121111J - : Engine Coolant Thermostat Kit for Audi Image

Engine Coolant Thermostat Kit

Incl.Gasket,Housing and Thermostat. S4, RS4. Cabriolet S4. A6. 4.2L, A4/S4. Allroad. 4.2l.
Discontinued
7D121111AN - : Engine Coolant Thermostat Kit for Audi Image

Engine Coolant Thermostat Kit

Incl.Housing and Thermostat. 6.0L, primary. A8.
Discontinued
11538636594 - : Engine Coolant Thermostat Kit for BMW Image

Engine Coolant Thermostat Kit

Incl.Housing and Thermostat. To 12/2014.
Discontinued
4E0121445AC - : Engine Coolant Hose for Audi Image

Engine Coolant Hose

ATF Cooler. with Transfer Box Cooler. Transfer Box Cooler to Connector. Assembly. Incl.Two Hoses and Thermostat Valve. 5.2L, return with...
Discontinued
N90824404 - : Engine Water Pump Bolt for Audi Image

Engine Water Pump Bolt

2.8L v6. 3.0L v6. 2.7L v6.
Discontinued
9A210604004 - : Water Pump Assembly for Porsche Image

Water Pump Assembly

Porsche 9A2-106-040-04
Water pump & thermostat.
Discontinued

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FAQ for Thermostats

What is a thermostat, and what does it do?

A thermostat is a part of a vehicle's cooling system that regulates the flow of coolant between the engine and the radiator. It helps maintain the engine's operating temperature for efficient performance.

What are the signs that my car's thermostat is failing?

Common signs of a failing thermostat include an engine that runs hotter or colder than usual, fluctuating temperature gauge readings, coolant leaks near the thermostat housing, and the heater not blowing warm air. If you experience these symptoms, itÕs best to inspect your thermostat.

Can I drive with a faulty thermostat?

It's not ideal. A stuck-open thermostat can prevent the engine from reaching its optimal temperature, leading to poor fuel economy and increased emissions. A stuck-closed thermostat can cause the engine to overheat, leading to severe damage.

How often should I replace my car's thermostat?

Most car thermostats can last between 50,000 and 100,000 miles, but itÕs a good idea to check your vehicle's owner's manual for specific recommendations. Thermostat replacement may also be necessary if you notice signs of failure or during major coolant system repairs.