Reverse aid sensor problem

[TLO11]

yeah but i figured the dealership would try and say it was my fault for changing the bumper out

 

[01SMOKINSD]

How much were the sensors? Curious because Im gonna have to take mine in for the same reason and mine arent covered under warrenty and I dont want to get sticker shock! LOL

 

[edsf460]

I have a 05 350 the reverse sensor just quit in my factory bumper is there any way of checking to see what ones are bad