Parking sensors

[colrob1]

Hi , has anybody ever changed any front parking sensors on a A4 b8 ?

I've managed to get to the drivers side outside sensor through the wheel arch and fog light but I'm still getting a dead sensor .

I ordered a replacement from eBay off a 2015 car and was told they're the same .

They look physically different but have the same connection.

When parking assist is activated ,no graphic appears and there is just a long beeping sound . Basically the car is no different .

A small vibration can be felt at each sensor bar the faulty one and the replacement ,maybe a wiring issue .

Does the car need to be code read to clear the fault Any advice would be appreciated .

Thanks 

[Steve Q]

I'd definitely recommend a diagnostic check via a code reader. Even though you have done the right thing with the testing so far.