34 21 745 Removing and installing or replacing rear left or right brake caliper (Teves)

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2013 BMW 128i, 2012 BMW 128i, 2011 BMW 128i, 2010 BMW 128i, and 2009 BMW 128i. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: The brake pad wear sensor must be replaced once it has been removed (brake pad wear sensor loses its retention capability in the brake pad).

Necessary preliminary tasks:

Remove wheel . See WHEELS .
Read and comply with General Information .

After completing work: bleed brake system .

Press clutch 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 Clutch Pedal Down To Floor

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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:

Tightening torque, see 34 32 BRAKE LINES . .

Fig 2: Disconnecting Brake Hose From Brake Line

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Detach brake hose from brake caliper (3).

Installation:

Tightening torque, see 34 32 BRAKE LINES . .

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

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

Lift out retaining spring (1).

Fig 3: Lifting Out Retaining Spring

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Remove cover plug (1).

Pull brake pad wear sensor out of brake pad (right side only).

If necessary, replace brake pad wear sensor .

Fig 4: Identifying Cover Plug

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Unscrew guide bolts (1).

Remove brake caliper (2) by pulling forward.

Installation:

Tightening torque, see 34 21 REAR BRAKE .

Clean guide screws only; do not grease.

Check threads.

Replace all guide screws which are not in perfect condition.

Fig 5: Identifying Brake Caliper And Guide Bolts

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

Remove outer brake pad.

Inner brake pad is located with its spring in the piston.

Clean brake pads.

Do not grease backs of brake pads sleeve.

Fig 6: Removing Outer Brake Pad

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