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

WARNING: This page is about a different car, the 2010 BMW 135i, 2009 BMW 135i, and 2008 BMW 135i. 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 .
Remove front brake pad 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: Locating Pedal Support

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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).

Installation:

Tightening torque 34 32 1AZ, see 34 32 BRAKE LINES

Detach brake hose from brake caliper (4).

Fig 2: Identifying Holder, Square Head, Brake Line And Brake Caliper

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Installation:

Tightening torque 34 32 2AZ, 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 34 11 2AZ, 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: Removing Brake Pads

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IMPORTANT: Do not grease brake pads and guides with anti-squeak paste.

Clean contact surface (1) of brake pistons.

Fig 5: Identifying Contact Surface Of Brake Pistons

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