I did mine last year. I was loading up the race car onto my trailer. I've done this for 20 years, but for some reason didn't have the trailer ball secured under the tongue and the ball hit the black part of the rear bumper and uglied it. I replaced the bumper myself. Not fun, but doable. Take lights off and the couple bolts underneath. Take off the other hundred bolts and pull hard. The sensors are attached to a harness that is attached to the inside of the bumper. Take one connector off and the bumper comes off (If memory serves me right).