BMW Key Fob Replacement Cost BMW dealerships charge between $400 and $650 for a new car key fob. You can save money by purchasing the BMW keyfob online and having it programmed at home. Most BMW fobs have rechargeable batteries. You can purchase a replacement battery from a hardware store https://thekeylabcouk51409.actoblog.com/30642107/a-comprehensive-guide-to-bmw-key-fob-replacement-from-start-to-finish