BMW Questions? Ask a BMW Repair Expert for Answers.
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.thanks for providing the vin.
on this model, unless you have the shift linkage binding up physically preventing you from putting the shifter into reverse, then the issue is internal to the transmission - either a loss of fluid pressure (low fluid, bad internal seal, etc), a bad solenoid, or a bad clutch drum. the transmission will need to be opened at a minimum to verify, and likely a full rebuild will be in order at that point.
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