My rear park aid stopped working at christmas read all the Info on them, changed the park aid module at £90 still no joy, thought it must be a sensor done the checks that you do found one did not click, was going to order a new one and sort, when I would have the time to remove rear bumber, went work today reversed in at work and they work, had to go forward to check my hearing, all I could put it down to is: had the car nearly a year allways washed by hand, at Christmas was looking a bit dirty and jet washed it, then we had a big freeze and wet weather, last few days have been mild and very windy must have dryed out, sensors must be very sensitive, will be very carefull in future, great to have them back.
Regards Steve

 

Good news!
Best to avoid the jet washer maybe.

 

Thank,s for the advice, will be the first and last time I jet wash.
Regards Steve

 

Does anyone know where you can find a replacement park assist module in Canada?

 

It's unlikely to be broken but ebay, a wrecker, any jag dealer.