Hi all, New member (go easy :). My rear parking sensors worked fine all summer, unless the car was washed and then they went completely random. Now the weather has turned they are very hit and miss, even when they sound ok I don't trust them. I know it's obviously a water issue, but how easy a fix are they? And if its just one dodgy one is it easy to track which one is faulty? Not the end of the world if they don't work, but Mrs C. uses the car now and again.......!