A little over a week ago my wife got a dash warning which read "Acceleration reduced" - contact Tesla service at your convenience. We called our Rocklin, CA service center, and we agreed the car should be brought in. They connected us to the San Rafael, CA service center which is a bit closer than Rocklin (and a straight shot down Hwy 101). They sent a tow truck to us (we are almost 300 miles north of the closest service center). We just received the car back today, and the invoice states the following: Logs Pulled Corrections: Vehicle Alerts General Diagnosis Reviewed vehicle logs and confirmed HV battery issues. Performed diagnostic testing and found HV battery power switches are indicating premature wear preventing vehicle from proper operation. Recommend replacing power switches with new. Corrections: Replace Power Switches, HV Battery 2.0 Replaced HV battery power switches with new. Performed verification tests and vehicle now charges and operates as designed. The parts used or added were: Field Kit Pyro Fuse - Pack 2.0 (1084549 1-00-D) and Field Contractor kit w/o fuse - pack 1 2.0 (1089626-00-B) They also checked tire pressure, measured tread depth, and replaced the parking brake calipers under recall. They also did a nice job of cleaning the car and shipped it back to us. I have read that this problem has occurred in a few Model S, but the tech we spoke with thought this might be new to the X. All in all we were quite pleased with this warranty repair and Tesla's service.