34 21 745 Removing And Installing Or Replacing Rear Left Or Right Brake Caliper (TRW)

WARNING: This page does not describe the selected car, but rather 33 other vehicles, including the 2018 BMW M6, 2018 BMW 650i xDrive, 2018 BMW 650i, 2018 BMW 640i xDrive, and 2018 BMW 640i. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Remove WHEEL .
Read and comply with GENERAL INFORMATION .
Switch off ignition.

After completing repair work: BLEED BRAKE SYSTEM .

Press brake pedal down to floor and secure with pedal support.

NOTE: The pedal support may only be released when the brake lines are reconnected.
This prevents brake fluid from emerging from the expansion tank and air from entering the system when the brake lines are opened.

Fig 1: Pressing Brake Pedal Down To Floor

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Grip brake hose at square head (2) so that connecting piece cannot rotate in retaining bracket.

Disconnect brake hose from brake line (1).

Installation note:

Tightening torque: 34 32 1AZ .

Fig 2: Brake Line With Square Head

Courtesy of BMW OF NORTH AMERICA, INC.

Release banjo bolt (1) on brake caliper.

Release holder (2) if necessary.

Installation note:

Replace gaskets.

Tightening torque: 34 32 3AZ .

Fig 3: Banjo Bolt On Brake Caliper

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Never twist brake hose when installing it and avoid all contact with components attached rigidly to the body.

NOTE: First tighten brake hose on brake caliper.
Insert brake hose in bracket and screw onto brake pipe.

Disconnect plug connection on parking brake actuator.

IMPORTANT: Switch off ignition at least 30 seconds before disconnecting the plug connection.

Unscrew guide bolts (1).

If necessary, grip at hexagon head (2).

Remove brake caliper (3).

Installation note:

Replace guide bolts.

Tightening torque: 34 21 5AZ .

Fig 4: Brake Caliper, Hexagon Head And Guide Bolts

Courtesy of BMW OF NORTH AMERICA, INC.

The EMF actuator must be remounted if the brake caliper is replaced.

After installation, observe the following: switch on ignition and, using parking brake operating element, open parking brake once, close once and open again.

Necessary preliminary tasks:

Remove WHEEL .
Read and comply with GENERAL INFORMATION .
Switch off ignition.

After completing repair work: BLEED BRAKE SYSTEM .

Press brake pedal down to floor and secure with pedal support.

Fig 1: Pressing Brake Pedal Down To Floor

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Grip brake hose at square head (2) so that connecting piece cannot rotate in retaining bracket.

Disconnect brake hose from brake line (1).

Installation note:

Tightening torque 34 32 1AZ .

Fig 2: Brake Line With Square Head

Courtesy of BMW OF NORTH AMERICA, INC.

Detach brake hose (1) from brake caliper.

Installation note:

Tightening torque 34 32 3AZ .

Fig 3: Brake Caliper Brake Hose

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Never twist brake hose when installing it and avoid all contact with components attached rigidly to the body.

NOTE: First tighten brake hose on brake caliper.
Insert brake hose in bracket and screw onto brake pipe.

Disconnect plug connection on parking brake actuator.

IMPORTANT: Switch off ignition at least 30 s before disconnecting the plug connection!

Unscrew guide bolts (1).

If necessary, grip at hexagon head (2).

Remove brake caliper (3).

Installation note:

Replace guide bolts.

Tightening torque 34 21 5AZ .

Fig 4: Brake Caliper, Hexagon Head And Guide Bolts

Courtesy of BMW OF NORTH AMERICA, INC.

The EMF actuator must be remounted if the brake caliper is replaced.

After installation, observe the following: switch on ignition and, using parking brake operating element, open parking brake once, close once and open again.