Master Cylinder and Power Brake Booster

ICU Mounting Location:

A vehicle equipped with Antilock Brake System (ABS) uses a different master cylinder and power brake booster than a vehicle that is not equipped with ABS. Vehicles equipped with ABS use a center port master cylinder while vehicles not equipped with ABS use a compensating port master cylinder.

The brake tubes from the primary and secondary outlet ports on the master cylinder go directly to the Hydraulic Control Unit (HCU).

The brake booster functions the same as the one used in the base brake system, but differs in the fact that it is sealed at the master cylinder differently. There is a seal that mounts on the rear of the master cylinder that seals in the vacuum of the booster. It must be replaced each time the master cylinder is removed and installed.