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The clutch actuator is an electro-hydraulic or electromechanical unit that automates clutch engagement and disengagement in vehicles fitted with automated manual transmissions (AMT), dual-clutch gearboxes (DSG/DCT), or robotised single-clutch systems. It replaces the conventional clutch pedal and concentric slave cylinder, responding to gearchange commands from the transmission control unit within milliseconds. A faulty clutch actuator can cause jerky gearchanges, failure to select gears, clutch slip, or a transmission fault warning light. CarParts247 stocks replacement and remanufactured clutch actuators for popular AMT and DSG platforms from Sachs and LuK.
Automated clutch systems self-calibrate on each ignition cycle. When the actuator begins to fail, the self-calibration values move outside range and the transmission control unit stores a fault code.
Replacing the clutch actuator usually requires transmission control unit (TCU) adaptation or clutch calibration using a diagnostic tool with full system access. On some DSG applications the mechatronic unit (which incorporates the actuator) must be replaced as an assembly. Always top up or replace the DSG or transmission fluid as part of the repair.




Commonly searched OE numbers fitting Clutch Actuator from the TecDoc catalogue.