After about a year i noticed that some times i could not lock and unlock the doors but the buttery was o.k. At the local service at the begining the reprogramed the keys but after a while the same problem appeared so they replaced the CR2032 buttery with 2 CR2016 butteries and since then everything works fine... I must also say that i don't use so much the key for locking and unlocking becouse i use the remote of the "automate" alarm system i have fitted..