2018 Tesla Model 3 service brakes problems
86 owner complaints filed with NHTSA name the service brakes on the 2018 Tesla Model 3 — 9% of all complaints for this model year.
What owners report
“My hard brake lines were corroded and had to be replaced on a 7 year old model 3 with 70k miles on it. The cost was over $4000 as battery has to come out and it's very labor intensive. Tesla offered no help with paying for this. They tried to say the car probably was in a very corrosive environment…”
filed Mar 29, 2026
“Vehicle is 7 years old with 107,000 miles. I received a warning regarding low brake fluid with instructions not to drive the vehicle. Dealer is advising all brake lines are rusted out and need replacement. Rusted lines are apparently causing the brake fluid to leak. I've never heard of any vehicle…”
filed Dec 23, 2025
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related service bulletins
On certain Model 3 vehicles, brake lines may be corroded beyond acceptable limits, which may result in loss of brake fluid. Loss of brake fluid will result in a customer facing alert if the fluid reaches the…
SB-26-33-001 · Service Bulletin/Repair Instructions · issued May 8, 2026On certain Model 3 vehicles, brake lines may be corroded beyond acceptable limits, which may result in loss of brake fluid. Loss of brake fluid will result in a customer facing alert if the fluid reaches the…
SB-26-33-001 · Service Bulletin/Repair Instructions · issued Feb 11, 2026
Service Brakes problems in other Model 3 years
| Year | Reports | Share |
|---|---|---|
| 2025 Model 3 | 12 | 11% |
| 2024 Model 3 | 3 | 1% |
| 2023 Model 3 | 51 | 12% |
| 2022 Model 3 | 166 | 22% |
| 2021 Model 3 | 124 | 19% |
| 2020 Model 3 | 46 | 10% |
| 2019 Model 3 | 60 | 10% |
| 2017 Model 3 | 3 | 12% |
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.