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BMW Brake Wear Warning Light – Reset E46 E39 E38 X5 X3 Z4

November 9, 2010

This answer is applicable for many BMWs in addition to the one listed below.

Q
My problem is that the brake light(on the dash) is always on. I had my local repair shop who know BMW’s very well, replace the front and rear sensors. Plus the sensor for the brake fluid. There’s nothing wrong with the brake pads or brake fluid canister. What suggestions do you have for why this problem is still ongoing? What it is is the word “brake” lights up on my dash. And I get the warning announcement “check brake lining” So, if the sensors have been replaced and I don’t need brakes, front or rear, what could be causing this? It’s really annoying!

A
If the Check Brake Lining warning is coming up, the system is getting an open circuit through either the left-front or the right-rear pad wear sensor. Have both of these sensors been checked or replaced (regardless of actual pad condition)? If both sensors are in proper condition, the warning just needs to be reset.

The reset procedure is applicable to the models listed below:

* E46: 3-series 99-05
* E38: 7-series 96-01
* E39: 5-series 97-03
* E53: X5 through 06
* E83: X3 through 06
* E85/E86: Z4 through 08

You can reset the brake wear warning as follows:

Put the key in the ignition and turn it all the way forward to the ignition position … but don’t start the engine. Leave it in this position for 2 minutes, or so, and then take the key out. Now, reinsert the key and the light should be gone.

These reset procedures are covered in the applicable Bentley repair manual, as well as the procedures for the brake pad, rotor and sensor wire replacements.

Bentley repair manual:
BMW

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