Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2018 Tesla Model 3 owners, lightly cleaned up (personal details are redacted by NHTSA).
The contact owns a 2018 Tesla Model 3. The contact stated while driving at a slow speed in ongoing traffic, the vehicle accelerated independently and bumped into the vehicle in front of her lane. The contact stated no warning light was illuminated. The contact stated no one was injured nor sought medical attention. No police report was filed. The contact stated her vehicle did not need any repairs but the other vehicle did. The vehicle was not diagnosed or repaired. A dealer was not contacted about the incident. The contact stated she continued to experience the failure. The contact stated on November 2021, while she was driving at slow speed in a parking lot, the vehicle accelerated independently and she crashed into a concrete post. The contact stated no warning light was illuminated. The contact stated no one was injured nor sought medical attention. No police report was filed. …
The Rear Camera feed was delayed by almost 1 sec resulting in the crash and hitting the shelf while backing the vehicle. The software version which was installed 2023.12 Tesla more and more relying on cameras for ADAS but the Software patches result in lot of random behaviors in the car... Tough being on stable release the Software still buggy and continue to surface random software related bugs In my case the feed from froze for more than a second .. Resulting in the Crash..
The contact owns a 2018 Tesla Model 3. The contact stated while driving 25 MPH, there was an abnormal sound coming from the vehicle. There was no warning light illuminated. The vehicle was taken to the dealer and the contact was informed that the front upper control arm, and the shifter cable needed to be replaced. The vehicle was repaired. The manufacturer was not contacted. The failure mileage was 39,000.
I was exiting the highway onto a Blvd and I slowed down. The car all of a sudden accelerated by itself, went over the exit curb and hit the central median of the blvd. Fortunately, no vehicles on the blvd wer crossing when this happened. I was fortunately not physically hurt in the incident but it could have been afr worse if I had a vehicle in my front or on the lvd when the incident happened.
This is a report of suddent unintended acceleration on a 2018 Model 3 performance with 47,800 miles on the odometer - the first known occurrence on this car. At 50% state of charge, I drove the Tesla on a 10 minute trip and pulled into an underground parking garage with 3 lanes of valet parking. At about 5-10 MPH, the forward collision warning came on as I was driving towards the cones and stop sign. I brought the vehicle to a full stop with the friction brakes (not regenerative braking, which was set to LOW). The drive mode was set to HOLD, which lets the car roll forward but not backwards and doesn't CREEP when foot is off the brake. About 15-30 seconds after coming to a complete stop, my foot was hovering over the brake with maybe slight pressure up to 5%. The car suddenly lurched forward with wide open throttle type acceleration. It has over 450 electric horsepower from 2 motors. …
The High Voltage Service Panel is part the battery which is part of the manufacturer warranty and drivetrain. A lot of Tesla cars had this problem and they are being charged $1800 to $2000 to "fix" this common failure. The problem is that the battery stop receiving the full amperage to charge the battery appropriately. In my case, I started charging more frequently on Superchargers during a long trip to different locations without a Level 2 homecharger and stopped several times into the Superchargers of Tesla. A diagram of the drivetrain and Battery system placed the High Voltage Service Panel as part of the battery. I had the problem since the past 2 years and did not fixed it, after I was sent an estimate cost of "repair". I said that it was part of the battery system and they refused to accept it. …
On March 21, 2025, my Tesla Model 3 Long Range entered "Power Reduction Mode" - a safety feature that limits power to protect the high-voltage battery from overheating or failure. Tesla later diagnosed a coolant leak near the battery area. Their own service advisor stated in writing that the failure was "most likely related" to the battery's thermal management system - the very system responsible for regulating battery temperature and preventing damage. Despite the connection to the battery protection system and the vehicle being under the 8-year/120,000-mile battery warranty, Tesla has refused to cover the repair. The issue remains unresolved, and I have not picked up or approved any repairs on the vehicle. My concern is that driving the vehicle in this state - or leaving this failure unaddressed - could lead to further battery damage or pose a safety risk. …
Description of the Safety Defect:My 2018 Tesla Model 3 AWD suffered an abrupt and catastrophic total loss of mechanical braking power while driving. The brake pedal went completely soft, and the vehicle lost hydraulic pressure.An independent mechanic inspected the undercarriage and confirmed that the factory steel hydraulic brake lines completely rusted through and ruptured, leaking all brake fluid from the system. This vehicle has 142,905 miles and has been operated in regions that use winter road salt.Tesla is aware of this severe corrosion defect under Service Bulletin SB-26-33-001, but they have categorized it as a service bulletin rather than a safety recall. A factory brake line rusting through to total fluid failure is an extreme and immediate safety hazard to occupants and the public. Furthermore, the vehicle simultaneously threw a "Front Motor Disconnected" warning. …
If both brake and throttle pedals are depressed simultaneously for a fraction of a second the software does two things: 1) raises a warning to that effect on the computer display and, 2) greatly reduces motor output, limiting acceleration. Item two is the safety concern. Removing the foot from the left pedal does not immediately remove the power restriction. There is a few second delay for that to take place. As a result I find myself expecting to be able to merge rapidly or complete a turn, or cross in front of oncoming traffic but am left in a precarious position in traffic unable to move as expected to avoid a potential collision. This is a behavior that I have not experienced with a conventional engine powered vehicle. In addition when this two-foot power-down mode is waiting to clear, and I am sitting stationary on a steep up incline, the vehicle can slip backwards downhill. …
I just traded in my vehicle for a Tesla from 3rd party dealership on [redacted] A light came on once I reached my home. I called right away before the dealership closed but no one answered. So I took it upon myself to make a service call to Tesla to get my vehicle checked come to find out my vehicle has extensive damages from my unit drive, my subframe and the battery pack is severe punctures and needs to be replaced. Choice Automotive LLC in Honolulu Hawaii didn't disclose anything to me before purchasing this vehicle. also they didn't disclose that this vehicle was in a car accident, but they carried on with the sale. I have pictures of what needs to be repaired. Tesla said, I will need $20,000 to repair these damages. So I'm trying to take legal action against Choice Automotive LLC for selling me a vehicle that needs a lot of repair to drive normal again. …
Transmission complaints in other Model 3 years
Frequently asked questions
How common are transmission problems on the 2018 Tesla Model 3?
NHTSA has 29 complaints about the transmission & drivetrain of the 2018 Tesla Model 3, 3% of the model year's 1,032 complaints.
Is there a recall for 2018 Tesla Model 3 transmission problems?
No. NHTSA lists no transmission & drivetrain recall for the 2018 Tesla Model 3, though it has 19 recalls for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2018 Tesla Model 3 transmission problems start?
Half of the complaints with a recorded mileage happened before about 15,000 miles, and 78% before 25,000 miles.
Is it dangerous?
Owners linked 5 crashes, 1 fire and 0 injuries to transmission & drivetrain problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.