34 11 520 Removing and installing/replacing front left or right brake caliper (Brembo)

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 wheels. . See WHEELS .
Remove front brake pad wear sensor

NOTE: Read and comply with General Information .
After completing work: Bleed braking 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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If necessary, pull brake hose out of holder (1).

IMPORTANT: Grip brake hose at square head (3) to prevent connecting piece from turning in retaining bracket.

Disconnect brake hose from brake line (2).

Fig 2: Disconnecting Brake Hose From Brake Line

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Installation:

Tightening torque, see 34 32 BRAKE LINES . .

Detach brake hose from brake caliper (4).

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.
Move wheels into straight-ahead position.
Insert brake hose in bracket and screw onto brake pipe.

Release bolts (1) and pull off brake caliper with brake anchor plate towards rear.

Installation:

Tightening torque, see 34 11 FRONT BRAKE .

Fig 3: Identifying Brake Caliper Bolts

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Pull brake pads (1) off guide pins (2) and remove.

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

See BRAKES - TECHNICAL DATA .

Installation:

Clean brake pads, brake caliper and guide pins.

Do not grease backs of brake pads sleeve.

Brake pads must be correctly seated on guide pins.

Fig 4: Pulling Brake Pads Off Guide Pins

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Clean contact faces (1) of brake pistons and apply a thin coating of anti-squeak compound.

Fig 5: Identifying Contact Faces Of Brake Pistons

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