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https://articlescad.com/bmw-re....placement-key-11-thi
BMW Spare Key - How to Replace the Battery Sometimes, you only need to replace the battery on your BMW key fob. It's an easy fix. Find the keys you would like to program as well as an operational fob. Enter your car with all doors and windows closed, then insert the working key fob into the ignition and turn to put it in the correct position. Lost or Stolen keys Keys that are stolen or lo