NHTSA Complaint #11660199 — 2017 TESLA MODEL X

I own a Tesla Model X, and for the past two summers I’ve experienced a repeating safety-critical issue during hot weather. After driving for a period in the heat, multiple systems begin to fail. The car displays numerous warnings including: •“Parking brake requires service” •“Traction control disabled” •“Stability control disabled” •“Steering assist reduced” •“Automatic Emergency Braking unavailable” •“Regenerative braking unavailable” •“Lane Departure Avoidance unavailable” When this happens, the steering wheel becomes very stiff and hard to turn, which severely affects my ability to drive and control the vehicle. I’ve brought the vehicle to Tesla service twice. The first time (when it was still under warranty), they said they couldn’t replicate the issue. The second time, I brought it in while the warnings were still active. Tesla only cleaned some sensors and returned the car, but the issue returned again recently with all the same symptoms. This only happens in hot weather. Once the car cools down, the errors disappear. This intermittent issue is difficult for the service center to replicate, but it presents a serious safety risk, especially because steering and braking functions are compromised. I believe this is a deeper electrical or software issue affecting multiple safety systems under thermal stress. The issue has not been resolved, and the vehicle remains dangerous to drive in high temperatures.