In most cases its fuses or wiring issues.This is becoming an increasingly common problem on the 1-series so you are not alone.
The rear wiper has its own control unit mounted on the side of the motor behind the boot lid trim and this is the most likely cause of the problem. If you're sure that the fuse and wiring is ok then the rear wiper motor will more than likely require replacing. Unfortunately it isnt possible to check the switch without BMW equipment as it is optically switched.
The rear wiper has its own control unit mounted on the side of the motor behind the boot lid trim and this is the most likely cause of the problem. If you're sure that the fuse and wiring is ok then the rear wiper motor will more than likely require replacing. Unfortunately it isnt possible to check the switch without BMW equipment as it is optically switched.
See part number 8 shown in the diagram below:-------
This details will help.
Thanks.
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