BMW E39 Audio Module Becker BM54 Repair/Upgrade guide

If you have intermittent sound (there is no sound coming from few or from all of the speakers) problem on your BMW E39/E38 - your audio amplifier module is dead (not completely - only audio amplifier chips are dead). You can buy another BM54 module, but in some time you will face exactly the same problem. Because there is design issue - it has no heat-sink to dissipate heat from audio amplifier chips, so sooner o later these chips simply overheat and fail.
Here are detailed instructions how you can repair this module. More over, with these new audio amplifiers you will have better sound quality and more power (up to 50W per channel), but it depends on amplifier boards which you will use for repair.

Note: Be careful cutting traces on module - do not cut too deep! As you can damage in between layers. It is possible to use "Dremel" rotary tool kit to grind down the traces.

Видео BMW E39 Audio Module Becker BM54 Repair/Upgrade guide канала Andrius Čiginskas