BMW Replacement Car Keys Losing your BMW keys can be stressful but it doesn't have to be expensive. Find a locksmith who offers top quality service at a reasonable cost. Proof of ownership: This is usually an official document that contains your name address, address, and registration number. Key code: https://wwwthekeylabcouk59808.pages10.com/how-to-tell-the-good-and-bad-about-bmw-key-cost-65737786