34 21 295 Replacing Rear Left Or Right Dust Boot On Brake Caliper

WARNING: This page does not describe the selected car, but rather 50 other vehicles, including the 2016 BMW M5, 2016 BMW ActiveHybrid 5, 2016 BMW 550i xDrive, 2016 BMW 550i, and 2016 BMW 535i xDrive. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Remove rear BRAKE PADS .

NOTE: Dust boot can be replaced without dismantling the brake caliper and without removing the piston.
Use original BMW repair kit.
When the repair work is complete, please pay attention to the following:

Check brake pads and brake discs for wear.
Perform brake test on test stand.
Perform test drive.

Remove dust boot (1) from brake caliper (2) in direction of arrow with a suitable tool.

IMPORTANT: Dust boot must not be re-used!

Fig 1: Removing Dust Boot From Brake Caliper

Courtesy of BMW OF NORTH AMERICA, INC.

Clean contact surface of dust boot at brake caliper housing (1) and piston groove (2) with a lint-free cloth.

IMPORTANT: Carefully check brake caliper housing, cylinder bore and brake piston for damage and corrosion!
Corroded or damaged components must be replaced!
The contact surface on the brake caliper housing must be dry and free of grease before installing the dust boot!

Fig 2: Brake Caliper Housing And Piston Groove

Courtesy of BMW OF NORTH AMERICA, INC.

Pull sealing lip (1) of dust boot over the brake piston until the dust boot (2) is properly seated in the brake piston groove.

Put dust boot (2) uniformly onto contact surface of brake caliper housing and uniformly push in.

IMPORTANT: The dust boot must be correctly lying against the entire circumference of the brake caliper housing and the brake piston groove.

Fig 3: Pulling Sealing Lip Of Dust Boot Over Brake Piston

Courtesy of BMW OF NORTH AMERICA, INC.