Removal & Installation
Fig. Brake force regulator valve
If the vehicle is equipped with ASC+T, the BMW Service Tester must be used to properly bleed the system. Due to safety and liability issues, this job should only be performed by a BMW dealer.
Disconnect the negative battery cable. Remove the hydraulic fluid from the master cylinder with a syringe or hose used only with clean brake fluid.
Disconnect the brake lines at the top and bottom of the proportioning valve.
Remove the clamp from the valve and detach the pressure connection at the union.
Check day/year codes, reduction factor, and switch-over pressure to make sure the new valve is identical.
Install in reverse order. Bleed the system.