34 21 745 Removing and installing/replacing left or right rear brake caliper

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Necessary preliminary tasks:

Remove WHEEL .
Read and comply with GENERAL INFORMATION .

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: Locating Pedal Support

G04754178

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: see 1AZ in 34 32 BRAKE LINES .

Fig 2: Identifying Brake Line And Square Head

G06889995

Courtesy of BMW OF NORTH AMERICA, INC.

Detach brake hose (1) from brake caliper.

Installation note:

Tightening torque: see 3AZ in 34 32 BRAKE LINES .

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

Fig 3: Identifying Brake Hose

G06889996

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: First tighten brake hose on brake caliper.

If necessary, remove BRAKE PAD WEAR SENSOR .

Lift out retaining spring (1).

Fig 4: Lifting Out Retaining Spring

G06211783

Courtesy of BMW OF NORTH AMERICA, INC.

Remove cover plug (1).

Fig 5: Identifying Cover Plug

G06889985

Courtesy of BMW OF NORTH AMERICA, INC.

Unscrew guide bolts (1).

Withdraw brake caliper backwards.

Installation note:

Tightening torque: see 4AZ in 34 21 REAR BRAKE .

Clean guide bolts only; do not grease.

Check threads.

Replace all guide bolts which are not in perfect condition.

Fig 6: Identifying Guide Bolts

G06889986

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Mark any worn brake pads.
In the event of one-sided brake pad wear, do not change brake pads round.

Remove brake pads in direction of arrow.

If necessary, clean BRAKE CALIPER AND BRAKE PAD .

Fig 7: Removing Brake Pads

G06211787

Courtesy of BMW OF NORTH AMERICA, INC.