BMW 318/325/M3/525/535/M5 1989-1993 Repair Information

Clutch Master Cylinder


The clutch master and slave cylinders should be replaced as a pair. If one unit fails, the other usually will fail soon after.


  1. Remove the necessary trim panel or carpet.
  3. Disconnect the pushrod at the clutch pedal.
  5. Remove the cap on the reservoir tank. On some vehicles, there is a clutch master cylinder reservoir, while on others there is a common reservoir shared with the brake master cylinder. Remove the float container, if equipped. Remove the screen and remove enough brake fluid from the tank until the level drops below the connection for the filler pipe.
  7. Remove the lower/left instrument panel trim. Then, remove the retaining nut from the end of the master cylinder actuating rod where the bolt passes through the pedal mechanism.
  9. Disconnect the line to the slave cylinder and the fluid fill line going to the top of the master cylinder. Remove the retaining bolts and remove the master cylinder from the firewall.
  11. Install the clutch master cylinder in position. Make sure all bushings remain in position. Torque the mounting bolts to 6.5 ft. lbs. (9 Nm). Torque the fluid connections to 12 ft. lbs. (16 Nm). Fill and bleed the system.