Hi guys Iâve got a strange problem with my rear passenger door When using the key fob all the doors open about 90% of the time. The other 10% the rear passenger door lock has a mind of its own and stays shut. I thought it might be the battery and swapped it and it started to work fine. Then after a few month my wife opened the car using the key (Not the remote) I took the key to work and our spare key had no battery so she went old school and used the key â¦â¦. It only opened the three doors but not the rear passenger door. When I got home I used the key fob and again it started to work fine. Until last week it started to play up again After doing a bit of research I thought it was a faulty door lock. So I ordered a used on from ebay and fitted it this weekend â¦â¦. Works perfect for 2 day as an then â¦â¦.. its not working again. Strangely, if I give the key fob a double unlock click it will open the rear door â¦â¦ but this not all the time maybe 50/50 Its annoying me and also dangerous as that door is used for my 2 month old daughter . Any advice or help would be appreciated !!!