BMW Replace Key Service It may be that the battery in your BMW key needs to be replaced. This is a simple DIY project that you could complete yourself. You can purchase a replacement key fob on the internet from a reputable retailer and have it programmed to your vehicle https://car-locksmiths69884.goabroadblog.com/30075411/why-bmw-1-series-key-should-be-your-next-big-obsession