2018 Tesla Model X transmission problems

Filed Feb 5, 2026 · Electrical, Transmission · GA

The 2018 Model X experienced a sudden and complete loss of power and became totally inaccessible. All doors and access points were inoperable and the vehicle could not be unlocked, disconnected, powered on, or placed into any service or tow mode. Emergency front-trunk release cables had to be used and external 12-volt power applied at the jump terminals to wake the vehicle. The inability to access the vehicle was unexpected and alarming. Children, pets, elderly, and others could have been inside of the vehicle. Thankfully, they were not. Tesla inspected the vehicle and stated the failure was related to the battery coolant heater. The failure resulted in a complete vehicle immobilization and access failure. I had previously experienced restart warnings on the dashboard, but I did not expect a total lockout and loss of access. The inability to access the vehicle was unexpected and alarming. It may be a known safety issue. It should be recalled. This condition presents a serious safety risk because occupants could be trapped inside the vehicle and the vehicle cannot be accessed or moved without external power. In extreme heat or cold, or in a medical or emergency situation involving a child or pet, this failure mode could create a life-threatening situation. Importantly, even after multiple requests, I have not received a copy of the diagnostic report, or anything other than informal emails or calls. Tesla has not provided information regarding this failure other than broad statements, and visuals of the location of the battery pack, in an attempt to deny warranty coverage. The Tesla reports a High Voltage System alert currently. The vehicle is subject to Tesla’s Battery and Drive Unit Limited Warranty. Tesla has stated that the failed component was the battery coolant heater, but has refused to cover the repair under warranty. Tesla confirmed the failure but has not provided the diagnostic report, fault codes, or vehicle logs supporting its determination.

Filed Feb 4, 2026 · Acceleration, Brakes · AZ

During a recent incident where a tire issue caused damage to the wiring harness for the parking brake, resulting in a Parking Brake Failure notification on the screen, the vehicle would not stop or turn off. The vehicle displayed N for neutral on the dash, but the vehicle would drive forward unless the brake was depressed. In addition, we were unable to place the vehicle in Park, which meant that we were unable to shut it off. The only way to stop the vehicle from driving on its own and crashing into something was to place concrete blocks under the tires! Unplugging the 12v battery also had no effect! The vehicle kept driving as if it was in drive, and there as no way to stop it without placing the foot on the brake pedal the entire time or placing the blocks I referenced. The only way I was able to shut it off, was to pull what's known as the Fireman's Loop, which I'm guessing firemen pull in the case of an accident. I wasn't aware of this mechanism, and only learned of it after posting on numerous social media apps regarding this issue. This is a Major issue, as we are talking about a moving and unstoppable car! Tesla needs to build some mechanism that allows the car to be shut off by the driver or to override the screen and place the car in park. Pulling this firemans loop and unplugging the 12v battery, required me being in front of the vehicle, risking my life, as the vehicle could've easily moved if the concrete barriers didn't stop it, and also required me taking 30+ minutes to remove components from the Frunk, just to access these components!!

Filed Jan 30, 2026 · Transmission · 100,726 miles · CA · crash · 1 injury

The contact owned a 2018 Tesla Model X. The contact stated that while his wife was driving at approximately 17 MPH, the vehicle suddenly made a right turn and crashed into a bridge. No warning lights illuminated. The contact's wife did seek medical attention; however, she sustained minor whiplash. A police report was not filed, but a Police Department did report on scene. Upon further inspection, the contact arrived on scene and noticed that the Rear passenger-side tire had detached, possibly due to the axle. The vehicle was towed to a local Collision shop, where it was deemed a total loss. In addition, prior to the accident, the vehicle was taken to a local independent tire shop, where the front two Tire and Brake pads were replaced. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 100,726.

Filed Jan 26, 2026 · Tires, Transmission · 78,886 miles · AZ

The contact owns a 2018 Tesla Model X equipped with Lexani Tires, Tire Line: LX-20 Performance, Tire Size: 265/45/R20, DOT Number: 1TBA7B95C3724. The contact stated that while driving at an undisclosed speed, there was a loud sound coming from the front of the vehicle. After the vehicle was inspected, the contact observed tread separation on the driver’s side rear tire, and that the top tread portion of the tire was separating. Due to the tire failure, the vehicle became inoperable. Additionally, the transmission failed to properly shift into park(P), and there was a wiring harness failure following the failure. Due to the failure the vehicle was not drivable and required to be towed. The dealer was contacted; however, the vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The contact stated that the failure was associated with the federal safety agency Campaign Number: 23T009000 (TIRES). The tire was a replacement tire. The tire failure mileage was approximately 8,000. The vehicle failure mileage was approximately 78,886.

Filed Apr 14, 2025 · Transmission · OH

I have had to replace my axles/have had cv joint failure 3 times and have another service scheduled for a fourth CV/axle service. This is a known problem and Tesla has acknowledged it and done nothing about it. See Tesla service bulletin SB-20-39-001about premature axle/CV joint failures.

Filed Oct 29, 2024 · Driver assistance, Transmission · CA

While driving on highway with autopilot on . I received the message "Steering Assist reduced .Vehicle will require additional force to steer". I believe I hit a rough patch on the highway and my steering lost power and became very hard to steer the vehicle. Somehow I managed to drive for 20 miles to safety. When I recached home I did power reset few times and the issue went away. I noticed similar issues with model x but not for year 2018 Model x. I have opened a service request with Tesla .Tesla send me an invoice of $5500 for repair.

Filed Jul 24, 2024 · Electrical, Transmission · CA

AC compressor failed within 1000 miles of High Voltage battery being replaced. This is the second AC compressor failure, the first failure occured at approx 70k miles, Nov 2022. The AC is used to cool the battery during high voltage charging and driving. Upon failure speed can be reduced, determined by multiple factors and charging rate is reduced as well. I was told it was an internal failure of the compressor and when pressed further tesla was unable to explain why it failed, again.

Filed Jul 24, 2023 · Transmission · TX

Driving into a car wash, I placed the car in NEUTRAL. The instrument cluster confirmed as much with an 'N' symbol, while I was stopped, in the single-track for the car wash to push/pull the car through the apparatus. The car was pulled into the car wash about half-way (roughly 25-35 seconds of N). Then, the car spontaneously shifted to PARK, and indicated as much with a 'P' in the instrument cluster. No cars were behind me in the car wash, this time. And I was able to re-engage NEUTRAL for the remainder of the wash (about another 35-40 seconds). It is unknown if the car would revert to parking by itself, if I had not activated DRIVE to exit the wash. If it makes a difference, I was in the driver's seat the entire time -- as is the usual custom at this self-serve tracked car wash. This has happened 3 or 4 times before -- usually in connection with the car wash. It is very unclear if this is poor software or a sensor that is to blame. In my other Tesla, it tends to go to PARK without conscious user input when a body lifts out of the driver's seat. So this could be a simple sensor that is a bit touchy in this Model X that is the subject of this report.

Filed Feb 7, 2023 · Suspension, Transmission · MD

Tesla has a repair bulletin out for the half shafts of the Model X/S. There is significant stuttering/shuddering when accelerating moderately when the vehicle is in normal ride height or higher. Some folks experience it on the lower settings as well. This is a known issue that owners should not be responsible for payment/fix wise even if our of warranty as it’s a manufacturer defect that causes excessive wear on the tires in low, and on the CV boots and half shafts in normal ride height mode and higher when moderately accelerating. Out of warranty Tesla is still forcing owners to pay $97.50 for the assessment and $350 for the half shafts repair. This is NOT fair to the customers. Paying for a manufacturer defect is unacceptable for consumers and I entreat the federal safety agency to begin an investigation. Plenty of Tesla forums have this complain noted at length. Here is an example: https://teslamotorsclub.com/tmc/threads/model-x-shudder-shutter-legal-standing.243084/

Filed Dec 15, 2021 · Body, Transmission · CO

Dealing with 2 major safety issues and innumerable minor issues with our Model X. The first major safety issue involves our right falcon wing door. It will not properly open because it is sensing an obstruction that’s not there. The mobile tech told us that something inside the door has become disconnected causing the issue - clearly something that is occurring frequently. I’m struggling to get the vehicle repaired with Tesla and very worried that my kids will become trapped in an emergency. The second major issue is the front axles grinding down over time. My car is only 3.5 years old. My front axles have already been replaced once. They are beginning to make the “clunking” sound loudly enough that it is clear they need to be replaced again. Again, Tesla will make it incredibly difficult to get in and get the needed repairs on my vehicle.