BMW Key Fob Replacement Cost BMW dealerships charge between $400 and $650 for a new car key fob. You can save money by purchasing a BMW keyfob online and then having it programmed at home. Most BMW fobs are replaceable. You can purchase a replacement battery at a hardware store https://www-thekeylab-co-uk19844.ziblogs.com/30090961/how-to-know-if-you-re-prepared-to-go-after-bmw-key-fob-replacement