2018 Tesla Model 3 brakes problems

Filed Sep 3, 2026 · Brakes · NY

The break line ruptured causing loss of hydraulic pressure. The root cause was corrosion of the break line. This caused a major safety risk as I was unable to stop/slow the car down and had to coast to a stop. This is a known problem as addressed in Tesla's service bulletin SB-26-33-001. Tesla chose not to do a recall nor inform it's customers to get it inspected. The cost to replace the break line with corrosion resistant parts (as should have been done in the original design given that these cars as sold in the north east) is significant.

Filed Aug 14, 2026 · Brakes, Transmission · MA

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. A federal investigation and mandatory recall are urgently required to ensure Tesla replaces these defective lines for all affected owners before a fatal accident occurs.

Filed Jul 20, 2026 · Brakes · AZ

The rear passenger side break would not release. Had to be towed because the vehicle was non operational.

Filed Mar 29, 2026 · Brakes · VA

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 before I bought the car (I purchased it about a year ago). However, I've seen little to no corrosion anywhere on the car. I've decided to report this issue after talking with several lifelong mechanics who have said they have never heard of hard brake lines failing on a car with age and mileage that mine has. Also after searching owner groups I've heard from other owners that have had this same issue and it seems like a growing number especially in early model 3 cars. I was giving a warning about low brake fluid and advised not to drive the vehicle before getting it inspected.

Filed Jan 7, 2026 · Brakes, Electrical · FL

Please review attachment.

Filed Dec 23, 2025 · Brakes · MI

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, let alone a 7 year old vehicle, needing all brake lines replaced. After researching online, my 2018 Tesla Model 3 is not the only Tesla Model 3 with this issue. Specifically, it appears some early 2018 Model 3s have suffered this issue. I believe this is a design defect and safety issue, and that Tesla should be voluntarily repairing affected vehicles with this known issue, since it is a design/safety issue.

Filed Oct 24, 2025 · Acceleration, Brakes · IA

Repeatedly and randomly, with cruise control (not FSD) engaged, the car would brake, sometimes aggressively. The last time, it braked so hard the tires or brakes squealed and the car swerved slightly before I was able to regain control. This was on the freeway (in Colorado, if I remember correctly) while I was cruising at 70 or 75 MPH. I decided that that was the last time I would use cruise control; it was just not safe. I had an appointment on October 22 to take the car in for service. But then a friend told me this was called "phantom braking" and that there was no fix. A friend suggested that I contact the federal safety agency.

Filed Oct 13, 2025 · Brakes · VA

The brake lines badly rusted creating safety hazard as Tesla service reported when working on other maintenance. Not a warranty issue not covered as repair is over $3800. Vehicle was not abused and was kept clean regularly - this seems to be a vehicle defect if the brake lines can get moisture trapped behind the battery pack and create excessive corrosion requiring brake line replacement.

Filed Sep 2, 2025 · Brakes, Driver assistance · CA · crash · 1 injury

Main incident: Time: 2025-08-28 ~12:41 PM PST What happened: After searching for a parking space, the driver was preparing to reverse into the spot, the driver pressed up the stalk to shift the gear into reverse, a sound was heard and something showed up on the screen, the vehicle once again started accelerating and running forward suddenly and sharply (3 mph to 28 mph in 3 secs), driver tried to steer the vehicle away from cars and buildings to minimize danger, the car rushed onto a concrete curb, hit one blue Tesla, then hit the side of a concrete utility pole, and ran over a plant and last crashed into the chain-link french before it finally stops Injuries: * Spine pain for one passenger Damages: ** All tires blown out, tire falls off ** Severe damages throughout the vehicle body * One Tesla parked on the parking lot was severely damaged * The utility pole's base box was scraped and deformed * One plant was knocked down Similar case 3 few mins ago: Time: 2025-08-28 ~12:38 PM PST What happened: The driver entered a oneway parking lot, but found no available spot and was trying to back up, the vehicle suddenly accelerated on its own. The driver performed an emergency brake and stopped the vehicle. At the time the vehicle stopped, it was only about 20 inches away from two cars in front of it Injuries and damages: None What component or system failed or malfunctioned, and is it available for inspection upon request? Malfunctioning of the electronic control or braking system leading to abnormal acceleration Conflicting gear shifting and autopilot engagement design The right stalk is used to both shift gears and engage autopilot features, this design makes it very easy for the system to confuse the two actions Autopilot feature safety issues Autopilot features (whether its FSD or cruise control) should not be allowed to initiate abrupt acceleration to a dangerous speed in a low speed area (for example parking lot) Insurance claim filed, number: 25-647243342

Filed Aug 27, 2025 · Brakes · CT

All 4 Brake lines (tubes) from either from ABS or Brake booster pump are corroded and pierced. All brake fluid leaked front center of the vehicle and lost all brake. Brake lines or tubes are looks good from under the front and back tires. It looks like a quality of the brake lines / tubes from ABS to the bottom are not meeting the expected quality.