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BMW E46: beeping when driving slowly and the ABS computer being broken

Posted by jpluimers on 2022/01/31

Some time into the waiting for a new ABS/DSC computer to arrive for my E46, I heard beeping while driving slowly (it would start when standing still and disappear when driving around 20 km/h).

This was odd, as I didn’t touch anything besides the steering wheel or the gas and break pedals.

Nothing in the instrument cluster changed either, so that put me in the wrong direction.

When the ABS/DSC computer is broken, the cluster looks like this:

([Wayback] image from [Wayback] How to Change ABS ASC Control Module – Trifecta – #5DF5 Error – E46 | BMW E46 Fanatics Forum)

Instrument cluster with trifecta: ABS, DSC, BRAKE are all on.

Instrument cluster with trifecta: ABS, DSC, BRAKE are all on.

  • The DSC/ASC light in the center is yellow
  • The brake light is read
  • The ABS light is yellow

The brake light hid the issue, which was an easy fix, as per [Wayback] Parking brake light shows red + beeping while please | BimmerFest BMW Forum

Somehow I touched the handbrake (which I normally do not use) so it went up one notch. You hardly see it, but it normally does:

  • turn on the brake light red
  • beeps about every second at low speed after you come from a standstill

Easy fix though: release the handbrake.



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