Question about 1997 BMW 328

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Brake Light Circuit Failure

I have a 1997 328i and I am getting a "brake light circuit failure" displayed on my computer panel. When we check to see if the brake lights are working, they all appear to be.

I had this same problem several years ago on this car, but at that time, water was entering the right brake light assembly and when we replaced the entire assembly, the problem went away. This time, I don't know which assembly is having the trouble (left or right), so I would like to know if there is something else to test to see what/where the problem is. And can it be fixed without replacing the entire assembly?

It is really annoying because when this comes up on the computer screen, nothing else will...I can push "temp" and the temperature flashes on the screen for a moment, but then this error message comes back again and stays on (no, touching the 'check' button doesn't turn it off).

Anyone out there know how to help me? Thanks!

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  • lilBimmerfan Sep 23, 2008

    Thank you! Great. It is nice to know there might be a less costly answer.

    Where do I find the brake light switch? Is there one for both sides or are there switches in each brake assembly?

  • peejy Oct 04, 2008

    I have the same problem on my 1998 328i. i have changed the brake light switch but still the warning comes on.


  • moneyfarmer Nov 01, 2008

    same exact car, and same exact problem. i also replaced left assembly, but it still doing it.



1 Answer

Hi guy,

The problem is the brake light switch due to age. Change that switch and your problem will be gone. I have encountered this problem and a new brake light switch really fix the problem. Hope this help.

Posted on Sep 23, 2008


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SOURCE: BMW 328i false electrical warnings

check your bulbs may be loose

Posted on Aug 05, 2009

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When fuse is not blowing check the brake light switch. Remove the panel above the brake pedal. There you find several switches, the second from the bottom will be the brake light switch. Unplug the switch connector, put parking brake on, turn on ignition and short the two green wired pins.
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