Hi guys, I’ve got an Audi a3 8v 2015 s line automatic with front and rear parking sensors. Since June they’ve stopped working, I’m getting a fault code of B107A14 supply voltage for park assist sensor: open circuit/short circuit to ground, I’ve tested both looms and visually looked to see if there was anything wrong and they seem fine. So the next step I was going to check and look to see if I can fix the sensors would be to check the module, I’ve read online that the module is located in the rear boot but I can’t seem to find it in my car, Would Audi have placed the module anywhere else for a vehicle with both front and rear sensors ? And if so where used modules are going online for £15-25 so I was hoping if I swap the module it may solve all my problems since the wiring seems ok.

Link to LLL parts here. New the module is expensive, but I’d be tempted to use a second hand part. Looking at this diagram it looks like it’s in the central convenience area. I could be wrong. Double check the rear boot area behind the trim, and see if any of the parts marry up. Looking at the diagram, the module is located in the same area where the PDC speaker is. 

Long time not to have parking sensors if this happened back in June. Anything happen back then that could be related?

https://www.lllparts.co.uk/catalogs/audi/RDW/A3/745/9/919/919020