A fluid leak from the mounting bracket vent hole indicates a damaged input rod seal (5).

Damage to the power piston seal causes fluid to leak at the common master cylinder brake booster vent and may cause a reduction in power assist.

A fluid leak between the two housings indicates a damaged housing seal (6).

Damage to the spool valve plug seal (2) causes fluid to leak past the plug.

Damage to the accumulator seal (4) causes fluid to leak past the accumulator cap.

Tighten the return port fitting (1) to 10 N·m (88 lb in).