Hi Darren I run the Hilux Pickup Owners Club and have posted a few threads over there about the problems i had - Reversing Sensor Problems (you'll need to sign up to view that thread tho mate) Mine went back literally 10 times to have reversing sensor problems sorted. They swapped the bumper, sensors, control unit, painted the sensors, dried the sensors, cleaned the sensors etc etc etc but it never sorted it out. I finally got so fed up with the service team that i faxed a formal complaint to the general manager and dealer principle. I got a call back fom the GM later to apologise for all the problems, confirm that they were struggling with ideas on how to resolve this and recommended that the parking system be removed from the truck, the bumper replaced again and offered a refund. The Toyota Parking System is incompatible with the hilux steel bumper (its normally fitted to plastic car bumpers), your bumper will rust and the sensors will always play up. I'd recommend you get a refund and bumper swapped ASAP. After all the problems i then got a Targa Meta 2 number plate system for a third of the price which performed faultlessly all the time i had it http://www.abacuscaralarms.co.uk/alarms/meta/reverse-sensors.htm Hope that helps.