Hey folks, a bit new here so hello to you all.

I was doing some digging around the feasibility of retrofitting backup cam and parking sensors to cars that don’t have them from factory and it seems that while backup cam is relatively cheap and straightforward there’s not much consensus around just how possible or expensive the sensor retrofit could be but the threads were a bit old. Wondering if anyone has any more insight. Particularly curious about doing this on the 991.1 models