Hi. I have a 2007 rrs. It has had an autobiography conversion already done when I bought the car.
The parking sensors don’t work. Just a long beep when selsecting reverse. None of the sensors click when listening to them. I pulled back the rear bumper and the loom all seems to be plugged in and wired up. Does anyone have an idea where to start with fixing the problem? I was expecting the loom not to have been converted so I’m not sure now.

Be a sensor issue or a wiring issue. I had the same and it was wiring but you will have to pull the bumper right off to check properly. Back one is a lot simpler than the front so might be an idea to find out which end is logging a fault, I asked for help with a reader to diagnose but got no joy so as it was under warranty I took to the dealers who fixed under warranty

I had it scanned yesterday and this is the fault I got:

U0159-87 (2E) Lost communication with parking assist control module - Bus signal/message failure - missing a message