34 21 812 Overhauling left or right rear brake caliper (Brembo) (brake caliper removed)
WARNING: This page does not describe the selected car, but rather 21 other vehicles, including the 2013 BMW 328xi, 2013 BMW 328i, 2012 BMW 328xi, 2012 BMW 328i, and 2011 BMW 328xi. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
In the following work step, large forces occur at the brake caliper piston (up to more than 2800 N).
Risk of injury!
IMPORTANT:
Do not under any circumstances press out brake piston entirely.
To protect the pistons, place a protective plate (1) (e.g. hard wood or hard felt) in caliper recess.
a = min. 35 mm
Do not grip piston with fingers - risk of trapping!
Carefully force piston out through brake hose connection bore with compressed air.
Installation:
Do not jam piston when pressing in.
Press off dust sleeve (1).
IMPORTANT:
Machining of cylinders and pistons is not permitted.
Installation:
Dust sleeve must be correctly seated in groove (1) of piston and groove (2) of brake caliper.
The area between the dust sleeve and the brake caliper housing must be kept dry. It must not come into contact with Ate brake cylinder paste or brake fluid so as to ensure that the dust sleeve is perfectly seated.