your reversing lightsare not the most important light and they don't even come into the M.O.T. but it is annoying. as long as you've checked the bulbs and fuse and these are fine it will be the reversing light switch located on the gearbox, although i have not had to change one myself on a zafira i have done several on vectras and is a pretty straitforward job on all vauxhalls
Mike Payter, May 2006
