Calibrating Parking Sensors?

[tac63]

Hello Everyone,

I recently bumped my rear bumper on my Ram when backing a trailer into a drive, cut too close and scraped the trailer edge into the bumper. In doing so the bumper dented under the scratch and pushed into the rear fender. I took the truck by two well rated body shops in the area and one quoted $2500 to repair, one guoted $3100 to repair. I've looked under the truck and see no damage, the trailer bumped into the truck at less than 1 MPH and doesn't appear to have affected anything but cosmetic. Despite the fact that the only damage is as shown here, both shops stated the fender would have to be pulled back straight, and resprayed ($1600ish) and the bumper would have to be replaced. When replacing the bumper they will have to unplug the parking sensors (not affected) and each stated it would cost $1000 of the bids to "recalibrate" the parking sensors. I currently have no issues with the sensors and am just curious if this is really needed. They stated that after unplugging the sensors and replugging them in they will no longer work without a FCA tool to recalibrate. I am just curious if anyone knows if this is true or if generally speaking I should be fine just plugging them back in the new bumper.

 

[MannymanX]

Not true. I had to change my rear bumper twice and front once. No calibration needed, even if you change the parts.
Why would you need to calibrate them after just unplugging them?

 

[tac63]

Not true. I had to change my rear bumper twice and front once. No calibration needed, even if you change the parts.
Why would you need to calibrate them after just unplugging them?

I had a strong feeling that wasn't true. They tried explaining that the truck wouldn't recognize them once plugged back in and that the "tool" would allow it to recognize them and then they had to be calibrated to detect stuff. Thanks for confirming!