Recommended video Use spare key: You can try starting your Passat with its second key. It will also rule out any other problem with the first key, for example, water damage. How long does the key fob battery last? Depending on how often you use the key fob or remote control of your Passat, the battery should last between two and four years. This sub is dedicated to Volkswagen Passat enthusiasts, owners, mechanics, experts, and newbies! My B6 2005 Passat's drivers door won't unlock. The drivers side door won't unlock with the key fob or button inside, only solution is to open it from the inside, then the outside handle works just fine but if I lock it I have to open it AcY5QWD.

vw passat b6 key won t unlock