Hey guys i have i have a BA XR6 sedan, with the non premo head unit, and reverse parking sensors. I bought one of the $15 cheapo auxiliary cables of ebay and im sick of the interference i get with my sub among other things.

Long story short i want to get a new head unit, however based on my understanding of the stock set up, ill lose my reverse parking sensors if i wire up the speakers to the new head unit. Speaking to the bloke at JB he said it comes from a beeper at the back, (i swear it comes out of the speakers)

What are my options?