What to Do When You Lose Your BMW Keys BMW cars are expensive and come with sophisticated anti-theft technology. This makes them difficult to take away however, it can also make things when you lose the key. If you've lost the BMW key first step is to contact your dealer. https://www-thekeylab-co-uk90977.tinyblogging.com/5-things-everyone-gets-wrong-concerning-bmw-key-fob-73785102