Thermostats and Thermoswitches

Thermostats & Thermoswitches


The varying applications and divergent technologies of the internal combustion engine call for thermostats featuring different operating characteristics and modes of operation. For this reason, the BorgWarner thermostat program covers a remarkably broad performance range.

Wahler® Trademark

BorgWarner offers a broad portfolio of genuine BorgWarner and Wahler branded thermostats for the aftermarket. Both stand for premium quality. This means that these parts are of the same quality as the original issue used by automakers. Needless to say, our spare parts come with the same service life and operational reliability.

Thermostat Inserts

Thermostat Inserts

With their accurate coolant control, these rugged and maintenance-free devices are based on the operating principle developed by BorgWarner, and have stood the test of time for several decades.
Integrated Thermostats

Integrated Thermostats

Comprised of insert and housing, these modules are fully integrated into the engine.
Electrically Heated Thermostats

Electrically Heated Thermostats

Characterized by a broader working range, they adjust the internal engine temperature as needed in response to control signals from engine management. Because these devices contribute to reducing fuel consumption, they may be deserving of the attribute “environmentally friendly”.
Map-Controlled Thermostat

Map-Controlled Thermostats

Sleeve Valve Thermostats

Sleeve Valve Thermostats

Controlled by engine management independent of temperature, these thermostats facilitate variable control of the valve opening. They also aid in reducing fuel consumption, helping to conserve precious environmental resources.
Electromotoric Thermostats

Electromotoric Thermostats

Distinguished by their construction from thermostats with annular slide valves, these are used when high positioning accuracy of the slide valve and continuously variable, precision flow control is required.

Oil Temperature Thermostats

Factory-preset to a fixed temperature range, they control the lubricating oil circulation within that range.


These devices accurately convey temperature information from thermal management to associated electrical circuits. Fast, reliable and maintenance-free, they ensure a long engine life.



BorgWarner Aftermarket Europe GmbH
Morschheimer Str. 12
67292 Kirchheimbolanden

Phone: +49 6352 403 2300
Fax: +49 6352 403 4840
[email protected]

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