Description
The Sachs 3981 000 066 is a clutch actuator designed as a concentric slave cylinder (CSC), integrating the slave cylinder and clutch release bearing into one complete unit. It transfers hydraulic pressure from the clutch system to disengage the clutch, providing consistent engagement, reduced vibration, and smoother drivability.
By combining key components and eliminating the need for a traditional release fork, this CSC design helps reduce launch noise and harshness while improving long-term reliability. It is supplied as a new OE-quality replacement and is recommended to be replaced whenever the clutch assembly is serviced to prevent future clutch disengagement issues or hydraulic leaks.
Backed by a 3-year Sachs warranty, the 3981 000 066 is an ideal choice for professional clutch repairs on Smart 451 models.
Key Features
OE-matching clutch actuator
Integrated concentric slave cylinder (CSC) with release bearing
Restores smooth clutch disengagement and gear selection
Helps reduce vibration and noise compared with fork-style systems
Recommended replacement when fitting a new clutch
Supplied as a new unit
Backed by 3-year warranty
Vehicle Compatibility
fortwo Coupe (451) 01.07 onwards
fortwo Cabriolet (451) 01.07 onwards
Always confirm compatibility with an expert if unsure.
Replaces OE Numbers
smart:
A 451 250 00 62
451 250 00 62
Part Number
Sachs 3981 000 066
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