I have a small issue with my 2004 grand voyager . My central locking stops working and I have to remove the IOD fuse for 5 minutes so it resets the bcm then my central locking will work then after a day or so it stops again .. Now I have been told that there is a software update for the bcm that will rectify this but my local chrysler dealer said they will only do this if I have a full service with them costing £££ .. My question is are there any independent garages with the same software so they can update my bcm without paying a small fortune .. Thanks in advance Mark 2004 grand voyager 3.3 v6