jsmithe

Hmmm, I do hope this does help. It's the middle two on the rear that don't work. Any suggestions on the best way to 'scrape' off the paint and what to use so as not to damage them further? Sorry for responding so late. Apparently you can scrape the paint off with a screwdriver. Since the sensors have an aluminium surface, they can handle some abuse. You will need to scrape off the corrosion on the aluminium anyway, so a screwdriver seems to be the right tool for the job. Just make sure you only scrape the paint off within the rubber ring. When you repaint the sensor, make sure no paint goes onto the ring or you can throw the sensor away.

The problem with the parking sensors has been discussed on the german LOC. Apparently it's caused by some corrosion on the surface of the sensors (as they're made of aluminium instead of plastic, they may corrode if they get a small knock or a stone chip). You can repair it by gently scraping off the paint on the central part of the sensors, cleaning it with pre-paint and then re-painting it with a touch-up brush. Just make sure you don't paint over the rubber (?) ring on the outside of the sensor. That should make them work again an will only cost you a few minutes and a little bit of paint. I hope this is of help. :) Cheers JS