Map-Controlled Thermostat - MAHLE TM 21 103

The most effective managers in the thermal system: an electrical heating resistor is integrated in the operating element's expansion material. Consequently, these thermostats can be electrically activated, and thereby have a considerably faster effect on the engine temperature to keep the engine within the optimum range in various load and operating conditions. The result: more engine output with reduced consumption and emissions. An operating map stored in the engine control unit defines when and how heat is added.

Although thermostats are not standard wearing parts, there is considerable demand for spares. Whether due to an accident or as part of repair or maintenance work that requires access to the cooling system: these important temperature regulators should be replaced at that time to ensure continued functionality, because any loss of functionality or even complete failure can have severe consequences. If the thermostat is always open, the engine will be cooled too much. If the thermostat is always closed, then the engine will not be cooled at all and will overheat.

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