Our Legacy was recently involved in a minor fender bender. Insurance estimated $1,800 to repair the right rear corner plus supplemental cost to fix the disabled BSW/RCTA. Body shops around warned of a long wait due to backlog on parts availability so I settled for a mobile body shop who did a decent job and got it all done in one day on our driveway. Next, I brought the car to my regular Subaru dealer to address the disabled BSW/RCTA. Ended up authorizing a $150 diagnostic charge and $350 to replace the housing for the sensor. The Service Advisor came back later to report that the sensor module was acting up and would cost an additional $823 to replace. Frustrated, I declined further service and thought perhaps of getting a second opinion, Abouts two weeks ago, I picked up 4 50-lb bags of play sand and loaded them in the trunk. Left the bags in the car for almost half a day until I got home. The next time I drove the car, the dashboard light warning that the BSW/RTCA is disabled disappeared and it started giving the usual warning alerts of any incoming vehicles when backing up. Probably too early to say but a little procastination did pay. Maybe all that weight from the sandbags corrected the problem?