vibration coming from the rear end. He uses this car to commute to work in NJ. The car had a similar issue in May 2024, which was resolved with the rear wheel bearings being replaced for $624. He told the service advisor (Dan) to check the wheel bearings due to the previous repair that was performed on them. This time the dealer stated that the differential needed to be replaced at a cost of $2379.94. I trusted them and gave them the go ahead for the repair. After the repair was completed, my son drove the car to work. He called me on the way and said the vibration did not go away, and that in fact, it was worse. He brought the car back and was given a loaner this time. After two days, I received a call from Dan, and he stated the wheel bearings needed to be replaced. I asked why their original diagnosis was that the differential needed replacement. He stated that the differential replacement was needed and was coincidental to the wheel bearings. Well I don't believe in coincidences, and I believe the mechanic made a mistake that they are covering up. To add insult to injury, I looked up the cost of a replacement differential on the official Subaru parts website and it was listed as $1256.63 MSRP and available for a discounted price of $824.85. The dealer charged me $1714.94 for the differential (not including labor). I can understand some dealer markup, but this is excessive. I discussed this with the Customer Relations Manager, Holly Jackson. To her credit, she was able to get me a $458.31 refund for the cost of the differential. Of course, after the wheel bearings were replaced, the vibration was gone. Subaru did not charge me for the bearing replacement. How could they after charging me $1921.63 (after accounting for the refund) for a differential whose replacement was unnecessary. BTW this is the fourth Subaru I’ve purchased at this dealer and will probably be my last.