34 35 001 Replacing a brake pad wear sensor (front)

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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).

If a brake pad wear sensor that has already been ground has to be replaced even though the minimum brake pad thickness has not yet been reached, you must observe the following: The new sliding contact must be filed down with a file to the same length as the sanded sliding contact.

When replacing the brake pad wear sensor, a CBS reset needs to be carried out.

If a brake pad wear sensor was replaced without replacing the brake pads, the following needs to be paid attention to:

Carry out service function "CBS correction reset" via diagnosis and information system.

Necessary preliminary tasks:

Remove the front left WHEEL .
Partially detach the front left WHEEL ARCH PANEL .

Removal:

Press clamp (1) together and detach brake pad wear sensor (2) in direction of arrow from brake pad.

Detach cable of brake pad wear sensor from brackets (2).

Fig 1: Detaching Brake Pad Wear Sensor

Courtesy of BMW OF NORTH AMERICA, INC.

Detach the brake pad wear sensor from the brackets (1).

Fig 2: Locating Brake Pad Wear Sensor Brackets

Courtesy of BMW OF NORTH AMERICA, INC.

Disconnect plug connection (2).

Installation:

Fig 3: Installing Brake Pad Wear Sensor In Brake Pad

Courtesy of BMW OF NORTH AMERICA, INC.

Install brake pad wear sensor (1) in the brake pad in direction of arrow.

IMPORTANT: Make sure clamp (1) and brake pad wear sensor are properly seated in brake pad.

Attach brake pad wear sensor in the brackets (2).

Attach brake pad wear sensor in brackets (1).

Connect plug connection (2).

Fig 4: Locating Brake Pad Wear Sensor Brackets

Courtesy of BMW OF NORTH AMERICA, INC.

Required follow-up work:

Reset CBS (if applicable).