Replacing the dust boot on the rear brake caliper

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2023 BMW X2, 2022 BMW X2, 2021 BMW X2, 2020 BMW X2, and 2019 BMW X2. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Vehicle may slip off the vehicle hoist if the vehicle hoist is handled incorrectly .
Danger! Immobilization period-threatening injuries!

Observe safety instructions on raising the vehicle using a vehicle hoist.
For additional information see: RAISING THE VEHICLE WITH A VEHICLE LIFT) .

CAUTION: Effects on other persons .
Injury hazard! Risk of damage!

Make sure that no other persons are in or around the vehicle.

NOTE: TECHNICAL INFORMATION
During work on the rear brake, it must be ensured that the button for the electromechanical parking brake cannot be pressed.

NOTE: TECHNICAL INFORMATION
General information on changing the brake pads:
For vehicles older than 48 months it is recommended to replace the retaining spring or expanding spring.
The brake pad wear sensor must be replaced once it has been removed because the brake pad wear sensor loses its retention capability in the brake pad.
A CBS reset must be done after every brake pad exchange:
A CBS reset in the vehicle is possible in the event of a partially ground down brake pad wear sensor. The CBS display in the Central Information Display (CID) is active.
In the event of a brake pad wear sensor that is not partially ground down , a CBS reset is only possible with the diagnostic system. No CBS display in the Central Information Display (CID).
If adhesive bonded brake pads are installed, the brake pads must be replaced after releasing the adhesive bond!

NOTE: TECHNICAL INFORMATION
To prevent damage to the surface coating: With floating calipers on the brake caliper mounting bracket or with fixed calipers in the brake caliper housing, do not clean the contact surfaces for the brake pads to the extent that it is possible.
Clean the contact surfaces with brake cleaner (BMW part number 83 19 2 154 780). Next, apply a thin coat of brake pad paste (BMW part number 83 19 2 158 851 for 3 g) or 83 19 2 158 852 fr 100 g).
Spread brake pad paste on the marked surfaces with a brush.
For additional information see: GUIDELINE FOR APPLYING BRAKE PAD PASTE ON BRAKE PADS AND BRAKE ANCHOR PLATE .

Preliminary work

Refer to REMOVING THE REAR LEFT AND RIGHT WHEELS .
Refer to REMOVING REAR BRAKE PAD WEAR SENSOR .
Refer to REMOVING REAR BRAKE PADS .
Refer to MEASURING MINIMUM BRAKE DISC THICKNESS (REAR BRAKE) .

Use a suitable tool to remove dust boot (1) from brake caliper (2) and then dispose of dust boot.
Do not reuse the dust boot.

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Use a lint-free cloth to clean the contact surface of the dust boot at the brake caliper housing (1) and at the annular groove (2) of the brake piston.
Carefully check the brake caliper housing cylinder and the brake piston for damage.
Replace corroded or damaged components.
To ensure that the dust boot fits perfectly: keep the area between the dust boot and brake caliper housing dry.

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Pull the sealing lip (1) of the dust boot (2) over the brake piston until the dust boot (2) fits completely inside the annular groove of the brake piston.
Position the dust boot (2) evenly on the contact surface of the brake caliper housing.

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Press the dust boot (1) with the assembly sleeve and the brake reset device 2 352 960 evenly into the brake caliper.

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Follow-up work

Refer to GREASING BRAKE PADS, BRAKE ANCHOR PLATE AND BRAKE CALIPER WITH BRAKE PAD PASTE .
Refer to INSTALLING REAR BRAKE PADS .
Refer to INSTALLING REAR BRAKE PAD WEAR SENSOR .
Refer to INSTALLING THE REAR LEFT AND RIGHT WHEELS .
Refer to START-UP OR BEDDING IN BREAK-IN OF NEW BRAKE PADS AND BLADES (REAR BRAKE) .