Over the last 18 months, my rear camera has thrown a wobbler from time to time and says it's unavailable, but it has never blown a fuse. It usually goes off for a couple of days and then mysteriously all is well again. I did ask the the dealer to check it 12 months ago when the car was in for a new condenser before the 3 year warranty expired, but at that time it was working fine and they couldn't find anything. Doesn't seem to be weather related so no idea what the problem is. I am not really bothered about it, if it expires so be it, but so far it has always come back to life on it's own.