2021 Tesla Model 3 cruise control problems
123 of the 664 complaints owners filed with NHTSA about the 2021 Tesla Model 3 name the cruise control (NHTSA’s “Vehicle Speed Control” heading — cruise control, adaptive cruise and unintended-acceleration reports). Filed under the same heading: 1 NHTSA investigation. Every figure below is a document in a federal file, linked; none is a failure rate, and none is a verdict on any one car.
What owners filed about the cruise control
Source: NHTSA complaint database11 of the 123 reports a crash · 0 a fire · 6 injuries. Self-reported, unverified.
Filed per year: 2020: 1 · 2021: 20 · 2022: 71 · 2023: 17 · 2024: 9 · 2025: 2 · 2026: 3
Too few of these complaints carry an odometer reading to say when the problem shows up.
664 complaints in all about the 2021 Tesla Model 3, 3 filed in 2026. The whole picture, every system →
Counts are owner reports to NHTSA, not verified defects, and scale with how many of these were sold; nothing here is a rate. NHTSA groups complaints coarsely, so “Vehicle Speed Control” means the same area of the vehicle, not one fault.
Across model years: Tesla Model 3 cruise control problems, every year on file →
In owners’ own words
Source: NHTSA complaint databaseFiled with NHTSA by the people who own these cars, about the cruise control. Quoted as written, with anything identifying removed; unverified reports — what was said, not a finding that it was true.
The contact owns a 2021 Tesla Model 3. The contact stated while driving 65 MPH with the cruise control activated, the vehicle decelerated, and the brakes activated erroneously. The accelerator pedal was depressed, and the vehicle returned to normal driving operation. The contact stated that the failure recurred several times.
Constant “phantom braking” when using autopilot on the freeway and other roads. When the pavement changes color, the car slams on the brakes in the middle of the freeway. When a truck is in the opposing lane, the car slams on the brakes. When a truck is merging into a lane to my right on the freeway, the car slams on the brakes.
My Tesla Model 3 is brand new and delivered in 2021, the vehicle has had no recalls or issues report by the manufacture and is running the latest software updates provided by Tesla, which as of this date is: 2021.36.8 I have driven the car since delivery a total of 5,596 miles, which includes a cross country road trip from CA to FL.
"Traffic Aware Cruise Control" (aka Autopilot) applied full braking and sounded collision warning when no collision was imminent. Had traffic been following closely, a rear-end collision could have occurred. Several other similar "ghost braking" incidents have occurred but this was the worst and most dangerous.
Autopilot constantly brakes due to automatic emergency braking on two-way highways at night. Every time a car passes in the other direction, the car starts braking, often as soon as the headlights are visible. This is a significant safety issue and resulted in me disabling AEB, which re-enables automatically every time I drive.
What is on file about the cruise control
Source: NHTSA recalls, investigations and manufacturer communicationsNHTSA investigation
- DP23002 Sudden Unintended Accelerationopened Jun 29, 2023 · open
- The Office of Defects Investigation (ODI) received a petition requesting that ODI reevaluate its decision to deny DP20-001 on the basis that intermittent high electrical current demands on the vehicles' 12VDC systems may have caused some or all of the incidents examined by ODI in DP20-001. The petitioner bases this information on a review of open-source research and the DP20-001 denial. The petiti…
Other systems with a record on the 2021 Tesla Model 3
Source: the same files- automatic emergency braking problems 593 complaints
- brake problems 126 complaints
- electrical problems 79 complaints
Common questions
Source: NHTSA complaint database, recalls and manufacturer communicationsAre cruise control problems common on the 2021 Tesla Model 3?
They are documented: NHTSA holds 123 owner complaints naming the cruise control on this model year (19% of everything owners filed about it), and 1 NHTSA investigation is filed under the same heading. Whether it is a problem on one particular car is a diagnosis, not a count, and a count says nothing about how many were sold.
Is there a recall for the cruise control on the 2021 Tesla Model 3?
No recall campaign is filed under this heading for this model year (there are 22 filed under other headings). A bulletin is not a recall: it carries no federal duty to repair for free.
When do cruise control problems show up on the 2021 Tesla Model 3?
Too few of the complaints carry an odometer reading to say. The model year's page shows the mileage curve across every system where it can.
What does NHTSA's "Vehicle Speed Control" heading cover?
Cruise control, adaptive cruise and unintended-acceleration reports. Owners choose the heading when they file, so it says which area of the vehicle the complaint is about, not which part failed.