2018 Tesla Model 3 vehicle speed control problems
90 owner complaints filed with NHTSA name the vehicle speed control on the 2018 Tesla Model 3 — 9% of all complaints for this model year.
What owners report
“While my wife was driving, the high-voltage battery failed and the car went into reduced power/limp mode. Tesla later determined that coolant had gotten into the high-voltage battery and caused it to fail. My main concern is that we had no warning that there was a coolant leak or that coolant was…”
filed Sep 6, 2026
“I am reporting a major safety defect that began immediately after Tesla installed the Full Self-Driving (FSD) hardware upgrade on my vehicle. After paying $2,000 for FSD and receiving the hardware retrofit, the car now instantly veers left toward oncoming traffic whenever FSD is engaged. This began…”
filed Nov 20, 2025
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Vehicle Speed Control problems in other Model 3 years
| Year | Reports | Share |
|---|---|---|
| 2026 Model 3 | 2 | 10% |
| 2025 Model 3 | 14 | 12% |
| 2024 Model 3 | 20 | 9% |
| 2023 Model 3 | 68 | 16% |
| 2022 Model 3 | 171 | 22% |
| 2021 Model 3 | 123 | 19% |
| 2020 Model 3 | 69 | 15% |
| 2019 Model 3 | 71 | 12% |
| 2017 Model 3 | 4 | 15% |
Other reported problem areas on the 2018 Tesla Model 3
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.