rear parking sensors

[Kennowaybino]

Hi all, wonder if anyone in this very knowledgeable forum can help ? i know it's not a VW but similar
i replaced the front bumper on my brand new Audi a3 sportback with a straight replacement from Quatro model, problem is mine had front and rear parking sensors where as Quatro doesn't have any had the front.
It's showing a fault also rear sensors won't work properly now, auto electrician has asked me to post on the forum :- PDC Module for rear sensors only ? Has anyone found a way to code of front sensors ?
Any help would be appreciated