Necessary preliminary tasks

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 BMW 328xi, 2012 BMW 328i, 2011 BMW 328xi, 2011 BMW 328i, and 2010 BMW 328xi. However, it is still accessible from the selected car via links, so may be relevant.

Remove WHEELS .
Remove BRAKE PAD WEAR SENSOR

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

IMPORTANT: Tie brake caliper back and do not allow to hang from brake hose.

Installation:

Tightening torque 34 11 2AZ .

Fig 1: Pulling Off Brake Caliper With Brake Anchor Plate

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IMPORTANT: When pressing down piston, note brake fluid level in expansion tank.
Overflowing brake fluid will damage the paintwork.

Turn piston back fully with special tool 34 1 050 .

Fig 2: Identifying Special Tool (33 1 050)

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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 .

Fig 3: Pulling Brake Pads And Guide Pins

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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.

Check minimum brake disc thickness:

Position special tool 34 1 280 at three measuring points in area (1) and measure.
Compare measurement result and lowest value with SETPOINT VALUE .

Fig 4: Positioning Special Tool (34 1 280) At Three Measuring Points

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IMPORTANT: New brake pads may only be fitted if the brake disc thickness is greater than the MINIMUM BRAKE DISC THICKNESS (MIN TH).

IMPORTANT: Do not grease brake pads and guides with brake pad paste.

Clean contact surface (1) of brake pistons with brake cleaner.

Fig 5: Identifying Contact Faces Of Brake Pistons

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Replace expanding spring (1).

Fig 6: Identifying Expanding Spring

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NOTE: After completing work:

When installing new brake pads at front and rear axles, brake fluid level must be brought up to "MAX" marking.
Fully depress brake pedal several times so that brake pads contact brake discs.
Read and comply with notes on BRAKING IN NEW BRAKE DISCS/BRAKE PADS .
When replacing linings, reset CBS display in accordance with factory specification.