BMW Key Fob Replacement Cost BMW dealerships charge between $400 to $650 for a new car key fob. You can save money by purchasing the BMW keyfob online and then having it programmed at home. Most BMW fobs come with replaceable batteries. You can purchase batteries at the hardware store https://carkeyreplacement09721.bligblogging.com/30766383/a-step-by-step-guide-to-bmw-key-fob-replacement-from-beginning-to-end