Complaint volume
650 consumer-submitted complaints are matched to this model year. Treat the count as a research signal, then read the actual summaries for repeated symptoms.
Complaint records
2021 Tesla Model 3 Complaints
650 consumer-submitted complaints on record for the 2021 Tesla Model 3, grouped by component category.
650 Total complaints
45 Crash reports
5 Fire reports
16 Injury reports
Complaint data reflects consumer-submitted reports. A complaint is not proof
of a defect, recall, or manufacturer fault. Enriched severity fields come
from official bulk records when the complaint can be matched by ODI number.
Buyer interpretation
How to use these complaints before buying
Complaint records are most useful when they turn into inspection points, seller questions, and comparison checks against nearby model years.
Pattern to inspect
The most common categories are forward collision avoidance, service brakes,forward collision avoidance, vehicle speed control,forward collision avoidance. Use those categories as a test-drive checklist instead of judging the vehicle from the total count alone.
Severity flags
Enriched records include 45 crash reports, 5 fire reports, 16 injury reports, and 3 fatality reports. These fields come from complaint records and should be read in context.
Mileage clue
Mileage is available on 42 complaints, with an average reported failure mileage of 18,076 miles. Compare that with the mileage on the listing.
Questions to ask the seller
- Have you had any problems related to forward collision avoidance, service brakes,forward collision avoidance, vehicle speed control,forward collision avoidance?
- Can I see recent maintenance and repair records?
- Has the vehicle ever been towed, involved in a crash, or repaired for the same issue twice?
- Can we also check the recall record for this 2021 Tesla Model 3?
Used-car checklist
Use these complaints before the test drive.
Build a buyer checklist to turn these issues into questions and inspection points.
2021 Tesla Model 3
Build buyer checklist Compare with other years Sends year, make, and model to pre-fill your checklist.
How severe are the 2021 Tesla Model 3 complaints?
45 Crash
5 Fire
16 Injury
3 Fatality
37 Towed
18 Medical attention
What are the most common 2021 Tesla Model 3 complaint categories?
FORWARD COLLISION AVOIDANCE 199
SERVICE BRAKES,FORWARD COLLISION AVOIDANCE 57
VEHICLE SPEED CONTROL,FORWARD COLLISION AVOIDANCE 53
UNKNOWN OR OTHER 41
VEHICLE SPEED CONTROL,SERVICE BRAKES,FORWARD COLLISION AVOIDANCE 33
ELECTRICAL SYSTEM 21
VISIBILITY/WIPER 12
VEHICLE SPEED CONTROL 11
SERVICE BRAKES 10
UNKNOWN OR OTHER,FORWARD COLLISION AVOIDANCE 10
650 total complaints on record
Latest complaints
| Date | Component | Summary | Severity | Mileage |
|---|---|---|---|---|
| Jul 2026 | SEAT BELTS,LANE DEPARTURE | Component: Lane Support System — Emergency Lane Keeping (ELK) Part of standard Autopilot safety suite (not FSD) activated without valid lane detection data and pushed the vehicle into the oncoming lane of traffic on Ohio State Route [XXX]. The system then aborted mid-intervention (LSS_STATE_ABORT), leaving the driver in the oncoming lane. The resulting head-on collision killed both drivers — the [XXX] Tesla driver and the driver of the oncoming vehicle. Two people died because of this ELK malfunction. Tesla's own telematics data confirms the following sequence: 5At 23:51:17.420 UTC, the Lane Support System activated Emergency Lane Keeping (LSS_STATE_ELK). 6At 23:51:17.652 UTC (232 milliseconds after activation), the system logged ALC_UNAVAILABLE_NO_LANES — confirming it had no valid lane detection data during the intervention. 7At 23:51:17.755 UTC (335 milliseconds after activation), the system logged LSS_STATE_ABORT — the system cancelled itself mid-intervention. 8During the 335-millisecond intervention, the vehicle's steering angle reached -16.79 degrees leftward and lateral acceleration measured +1.200 m/s² leftward — both confirming the vehicle was pushed into the oncoming lane. 9The driver responded with the largest steering torque (-5.08 Nm rightward) and largest rightward steering angle (+19.50 degrees) recorded in the entire telematics file — confirming he was actively attempting to recover. 10 The head-on collision killed both him and the driver of the oncoming vehicle. We requested additional telematics data from Tesla through the Tesla app. A forensic expert has examined the vehicle's ECU motherboard— missing critical fields including continuous yaw rate, high-resolution steering data, ELK steering commands, and lane detection confidence scores. A subsequent request for additional data produced an error message and Tesla has not provided further data. This crash is the exact behavior under PE25012. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6) | Crash: Yes Fire: No | Unknown |
| Jul 2026 | SEAT BELTS | Front Seatbelt On March 13, 2026, at approximately 7:51 PM EST (23:51 UTC), the driver of a 2021 Tesla Model 3 was killed in a head-on collision on SR 741 in Warren County, Ohio. Two people died in this crash — the Tesla driver and the driver of the oncoming vehicle. Tesla's own telematics data (provided to the family post-crash) reveals that the driver's seatbelt unlatched at Row 5115 / 23:51:03.269 UTC — exactly 14.15 seconds before the collision. The driver was actively driving at the time, as confirmed by 66 separate steering torque readings between the seatbelt unlatch and the crash, ranging from −1.59 Nm to +2.15 Nm in constantly alternating directions — the signature of active lane-holding. The seatbelt released on its own while the driver was actively steering based on tesla data at approximately 66 mph. No rational driver unbuckles their seatbelt while driving 66 mph on a busy two-lane road. The telematics data proves continuous active driving before, during, and after the seatbelt event. The seatbelt failure is a separate and independent defect from the Emergency Lane Keeping (ELK) system failure that caused the collision (which is the subject of a separate NHTSA complaint). Even if the collision was unavoidable, a functioning seatbelt may have saved the driver's life. The seatbelt failure independently contributed to the fatality. The following data is from Tesla's own telematics file provided to the family: Timestamp (UTC)RowEvent 23:51:03.269 5115 Driver seatbelt status changes from LATCHED to UNLATCHED 23:51:03.269 – 23:51:17.420(row 5115–5311)66 steering torque readings confirm active driving (−1.59 to +2.15 Nm) 23:51:17.4205311ELK system activates (separate defect) ~23:51:19.0—Head-on collision — driver unrestrained — two fatalities Pattern of identical complaints from other 2021 Model 3 owners (ODI 11713076, 11738583, 11684327) | Crash: Yes Fire: No | Unknown |
| Jul 2026 | ELECTRICAL SYSTEM | The high voltage battery on my 2021 Tesla Model 3 Standard Range suddenly failed without any prior warning or gradual degradation. The vehicle was consistently achieving approximately 180 miles of range per full charge. Overnight, the battery charge was restricted to approximately 30% capacity, reducing usable range to roughly 30 miles. No warning signs or symptoms appeared prior to this failure. The failure was sudden and immediate. The vehicle displayed the alert "Maximum Battery Charge Level Reduced / OK to Drive, Schedule Service." The battery has been confirmed by a Tesla Service Center as having an internal fault. The only remedy offered by Tesla is full battery replacement at a cost of approximately $9,000 to $14,000 depending on the option selected. This failure poses a safety risk as the severely limited range can result in the vehicle becoming stranded unexpectedly, particularly during highway driving or in areas without nearby charging infrastructure. The failure occurred approximately 6 months after the battery warranty expired with no prior indication of degradation, suggesting a potential defect in the battery unit. The vehicle has been inspected by a Tesla Service Center and the fault has been confirmed. The component is available for inspection upon request. | Crash: No Fire: No | Unknown |
| Jul 2026 | STEERING | My steering suddenly got extremely stiff on the highway while driving. There was a warning that assist will be reduced but no assist was present. I had to use all my strength to turn the steering and pulled into a parking lot with great difficulty. Then I reset the main computer and the power steering was functional again. I was lucky since the traffic was moving slower than usual but it could have been very dangerous and was a major safety concern. | Crash: No Fire: No | Unknown |
| Jul 2026 | FORWARD COLLISION AVOIDANCE,LANE DEPARTURE | On July 1, 2026, the vehicle was serviced by the manufacturer for GPS and camera malfunctions, and the vehicle computer was replaced. On the morning of July 2, 2026, during the first use of Autopilot after that repair, the vehicle experienced repeated serious driver-assistance malfunctions over a short period while traveling on a highway. While Autopilot was engaged, the vehicle repeatedly moved/steered toward the center of the road and near the path of a truck in an adjacent lane. The truck nearly struck the vehicle. The driver had to manually intervene to maintain control and avoid a potential collision. Video of the incident is available upon request and shows the truck and manual intervention. The vehicle was returned to the manufacturer service center the same day. The service center reviewed logs, performed an inspection/test drive, and stated that no hardware faults or issues were found and that the test drive was normal. However, the incidents were intermittent, occurred during highway Autopilot use, occurred the morning after a computer replacement related to GPS/camera systems, and were captured on video. | Crash: No Fire: No | Unknown |
| Jun 2026 | ELECTRICAL SYSTEM | The contact owns a 2021 Tesla Model 3. The contact stated that while the vehicle was set to Self-Driving Mode, the vehicle suddenly stopped abruptly without the brake pedal depressed. The contact depressed the accelerator pedal immediately to continue driving. The vehicle was taken to the dealer three times. The dealer reset the mirrors and sensors; however, the failure persisted. The vehicle had not been repaired. The dealer suggested that the contact purchase another vehicle. The manufacturer was not made aware of the failure. The failure mileage was unknown. | Crash: No Fire: No | Unknown |
| Jun 2026 | FORWARD COLLISION AVOIDANCE | I was driving my car on full self driving. I press the brake to stop full self driving the car immediately accelerated and caused a crash. | Crash: No Fire: No | Unknown |
| Jun 2026 | ELECTRICAL SYSTEM | This is my fourth high voltage battery failure on this vehicle. Battery replacements occurred at approximately 13,000 miles, 60,000 miles, 96,000 miles, and now at 121,000 miles. The first failure occurred at 13,000 miles on a nearly new vehicle. During the second replacement a Tesla service technician verbally stated that 'the refurb process has vastly improved since your last battery' before retracting the statement when questioned, strongly suggesting refurbished units were installed in a vehicle under original warranty. Tesla has declined to cover the most recent failure citing warranty expiration, despite this being a documented recurring defect that originated well within the warranty period. The vehicle is currently inoperable due to high voltage battery failure. I was around 40 days outside of warranty with this last failure. | Crash: No Fire: No | Unknown |
| Jun 2026 | UNKNOWN OR OTHER | The outside part of the glove box is coming off. It could prevent air bags from working properly. It seems like the O ring glue holding it together has failed. It is available for inspection upon request. The issue is well known and is documented online. The issue has in the past been inspected by the manufacturer and requests an approximate $400 from the customer to fix the issue. | Crash: No Fire: No | Unknown |
| Jun 2026 | VEHICLE SPEED CONTROL,SERVICE BRAKES,FORWARD COLLISION AVOIDANCE | The forward-facing camera and Autopilot computer system on my 2021 Tesla Model 3 has failed. The dashboard first showed intermittent warnings that "Automatic Emergency Braking is currently unavailable" and "Adaptive headlight features are unavailable." Over several weeks the problem worsened from intermittent to constant, and the vehicle progressively lost its forward road visualization and all active safety features. Using the vehicle's Service Mode diagnostics, the Autopilot computer's Primary (A) processing node reports a "CRITICAL" status. The fault log records repeated alerts including dasMIA (driver-assistance system not responding), aebFault (automatic emergency braking fault), and fisheyeCamInitFault and fisheyeCameraStreamExit (forward camera initialization and stream failures). The cameras themselves are physically clean and unobstructed. Safety risk: the failure disables Automatic Emergency Braking and forward collision avoidance, lane-keeping/driver assistance, and the adaptive auto high-beam headlights. AEB is a critical crash-avoidance system; losing it leaves the vehicle unable to brake automatically for an imminent collision, and the loss of adaptive headlights reduces nighttime visibility. A Tesla service center inspected the vehicle, confirmed the diagnosis, and determined the Autopilot computer — a sealed, solid-state control unit — had failed and required full replacement at approximately $3,400. The vehicle is well under 50,000 miles. This failure appears consistent with the same car-computer power-component shorting failure for which Tesla issued a recall on its newer model-year vehicles. The vehicle and the failed component are available for inspection on request. The vehicle has not been inspected by police or insurance. | Crash: No Fire: No | Unknown |
| May 2026 | FUEL/PROPULSION SYSTEM | BMS_a079 error. Battery is no longer able to charge. High voltage battery will need to be replaced. Basically rendering the vehicle useless unless the battery is replaced. | Crash: No Fire: No | Unknown |
| May 2026 | SEAT BELTS | The driver-side seat belt buckle/receptacle failed during normal use. There was no collision, impact, or misuse involved. While using the seat belt as intended, the buckle assembly separated/broke unexpectedly, causing the seat belt to no longer function properly. This appears to be a failure of a critical safety component rather than normal wear and tear. The vehicle should not be considered safe to operate until the restraint system is properly inspected and repaired. The failure occurred without warning and under ordinary driving conditions. | Crash: No Fire: No | Unknown |
| May 2026 | LANE DEPARTURE,FORWARD COLLISION AVOIDANCE | Component/System Failure: Total failure of the Autopilot ECU (DAS Computer) and the Front-End Module (FEM) wiring harness. Incident Description: My 2021 Tesla Model 3 (37,000 miles) experienced a catastrophic and "silent" failure of the entire vehicle vision suite and all active safety systems. A Tesla Service technician (Warrington, PA) inspected the vehicle and confirmed the root cause was a factory-defective (crimped) internal coaxial cable in the wiring harness. This manufacturing defect caused an electrical short that destroyed the primary safety-critical computer. Safety Risk: This failure resulted in a direct violation of FMVSS 111 (Rear Visibility), as the backup camera was rendered completely inoperable. Furthermore, all collision-avoidance features—including Automatic Emergency Braking (AEB), Forward Collision Warning, and Blind Spot Monitoring—were disabled. Critical Safety Concern (Silent Failure): The vehicle provided zero driver-facing alerts, dashboard warnings, or lamps to indicate that these safety systems were offline. I unknowingly operated a vehicle that was non-compliant with federal safety standards and lacked all primary crash-avoidance technology. The failure codes (APP_w045 and VCFRONT_a158) were only discoverable by manually entering the vehicle's "Service Mode." Manufacturer Status: Tesla Service has confirmed the hardware failure and the wiring defect but is currently refusing to cover the $2,800 repair cost, despite the failure involving systems currently under federal recall (SB-26-00-016). I am reporting this because a factory wiring defect causing a total, silent failure of federally manda | Crash: No Fire: No | Unknown |
| May 2026 | VEHICLE SPEED CONTROL,FORWARD COLLISION AVOIDANCE | When using cruise control, there has been 4 times that the car has engaged in “phantom braking”. We were driving on highways going the posted speed limit of 70 mph, when the car suddenly slammed on the brakes and decelerated to less than 30 mph – all four times we were thankfully not being closely followed by another vehicle or we would’ve had a devastating crash. One time when we looked at the screen, it showed the outline of a person in the median but there was no person/ other obstacle at all. We have reported this to the Tesla service center and they said it is a known issue, and what we have to do is just click the scroll bar and report it so that the engineers can mark the timestamp and collect data so that some patches can be sent over the air/ uploaded at a future date. Nothing has been done to fix the issue and we feel dismissed about our concerns about our family’s safety, and the safety of drivers around us. | Crash: No Fire: No | Unknown |
| May 2026 | ELECTRICAL SYSTEM | 2021 M3 138,000 miles Alerted error code BMS_a074 & BMS_a079 After reading forums, this seems to be a known issue with 2021 in particular. I am reporting in hopes something can be done about it. Yesterday both codes alerted within hours of each other. First that the charging was limited to 50% and would only charge once <50%; then shortly thereafter it alerted with Unable to Charge. I attempted to charge at home with 32A charger when at 28% and charge limit set to 50%— car would not charge. Today I put in Tesla service request with first appointment available in 10 days (still awaiting review). Attempted to try charging again while at home and this time, coincidentally after my service request, it is now charging. I lowered to 20A to trickle in for now…and currently up to 32%. March/April 2025 my ECU went out after 3 12V battery replacements within 2 months. Car has been driving well but without any camera systems (traffic awareness) or entertainment system. | Crash: No Fire: No | Unknown |
| May 2026 | POWER TRAIN | My RWD motor completely went out and lost power on the highway off ramp. Could have turned into a dangerous situation. Not sure why these motors seem to be very unreliable. Tesla has not given me an explanation as to what is exactly causing this. Happens to thousands of owners. And this car is only 5 years old. I had the motor replaced in November 2022 and 3 years later it’s out for good. Now I have to deal with teslas insane costs. I feel like they sold me a defective car. | Crash: No Fire: No | Unknown |
| Apr 2026 | UNKNOWN OR OTHER | I am filing a complaint regarding my inability to receive a safety recall remedy without first paying for a separate component replacement. Vehicle: Tesla Model 3 VIN: [XXX] My vehicle has an active safety recall related to hood latch functionality, which Tesla stated requires a firmware (OTA) update. Tesla informed me this update could not be installed unless the vehicle’s car computer (MCU/CPU) was replaced. Tesla classified this component as out of warranty and required me to pay $1,687.66 out of pocket (after a partial discount). Separately, my vehicle developed a charging failure requiring HV battery repair. Tesla confirmed in writing that they could not proceed with the HV battery repair or install required firmware unless the same computer was replaced. Tesla also confirmed that if I did not approve and pay for the computer replacement, they would not proceed with either the battery repair or the recall-related update. At the time, my vehicle was not drivable, and Tesla indicated the loaner vehicle would need to be returned if I did not approve the repair. This would have left me without a functional vehicle, leaving no practical alternative but to proceed. As a result, I approved and paid for the repair in order to restore vehicle functionality and receive the recall remedy. This payment was made under protest. Concern: This situation conditions access to a safety recall remedy on a customer-paid repair, creating a barrier to receiving a mandated safety fix. I request review of whether a manufacturer can require payment for a separate component in order to enable a safety recall remedy and essential repairs. I have written documentation supporting these statements. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6) | Crash: No Fire: No | Unknown |
| Apr 2026 | FORWARD COLLISION AVOIDANCE | When using the cruise control or self driving function the car will, unprovoked, brake suddenly and severely. Hitting the acceleration pedal will disengage the cruise control or self driving and will stop the deceleration. The error happens about 1-2 times per 20 miles. I do not use these features often due to several near miss car crashes due to deceleration error. Sometimes the car will report other phantom alerts (like curvature assist on a straight road). | Crash: No Fire: No | Unknown |
| Apr 2026 | VEHICLE SPEED CONTROL,UNKNOWN OR OTHER,FORWARD COLLISION AVOIDANCE | 2 problems 1,Phantom braking when cruise control is activated. 2, There's no rear door mechanical release in the event of a electrical power failure in the event of R.T.A | Crash: No Fire: No | Unknown |
| Mar 2026 | AIR BAGS,FORWARD COLLISION AVOIDANCE | The components involved are the automatic emergency braking (AEB) system and the airbag system. During the collision, the AEB system did not activate, and the airbags did not deploy. The vehicle is available for inspection upon request. I was driving on a main roadway with no stop signs or traffic controls in my direction when another driver entered from a side street with a stop sign and pulled directly in front of me. I was unable to avoid the collision, and my vehicle was struck the other vehicle. The failure of the AEB system to engage and the airbags not deploying increased the risk of injury to myself and could have posed a risk to others involved. The issue has not been reproduced, and it has not yet been confirmed by a dealer or independent service center. The vehicle has been inspected by police and insurance representatives. The other driver was determined to be at fault. I am in the process of addressing the incident with the manufacturer. There were no warning lights, messages, or prior symptoms indicating any issue with the braking or airbag systems before the collision. | Crash: Yes Fire: No Towed | Unknown |
| Mar 2026 | SEAT BELTS | - The rear middle seatbelt became locked and will not unwind or extend. The seatbelt remained stuck in the retracted position, making it unusable. The vehicle and seatbelt assembly are available for inspection upon request. However, Tesla has already fixed the issue, but I feel we were wrongly charged because I believe this should be a recall. I searched this issue online, and others have reported the same issue. Because we rarely have the need to use our rear seats, it wasn't until years later we discovered this issue. - Because the rear middle seatbelt cannot be extended, that seating position cannot safely be used. Any passenger sitting in that position would not have a functioning restraint system in the event of a collision, creating a safety risk. - Yes, Tesla service inspected the vehicle and confirmed that the rear middle seatbelt was locked and not functioning properly. - The vehicle has been inspected by Tesla service. It has not been inspected by police, insurance representatives, or other third parties. - No warning lights, alerts, or messages appeared prior to discovering the issue. The seatbelt was found to be locked when we attempted to use it, and it would not extend. | Crash: No Fire: No | Unknown |
| Mar 2026 | ELECTRICAL SYSTEM,FUEL/PROPULSION SYSTEM | The vehicle is undriveable due to a high‑voltage enable safety lockout triggered by ECU identity/MAC mismatch after a software/update window; local service instructed me to ‘safely disregard’ active safety alerts contrary to vehicle telemetry, creating a safety risk. Chronology (key timestamps) • Jan 28, 2026 — Low‑voltage undervoltage precondition recorded (DIF_a018). • Feb 2nd, 2026 — Low‑voltage undervoltage precondition recorded (DIF_a018). • Feb 03, 2026 08:46 — Identity/MAC invalidation alerts (CP_a089 / CP_a077); HV‑enable blocked cascade. • Feb 24, 2026 — Service app: estimate approval prompt; supervisor instruction to ‘safely disregard’ active HV alerts captured via screenshot. • Feb 27, 2026 — Persistent handshake stall (CP_a066, State B1) despite ‘successful’ software job and new firmware update to patch the 2026.2 tree branch software. Vehicle remains grounded. Safety Concern Vehicle telemetry states HV contactors are blocked to protect the vehicle; service staff advised to disregard active alerts. Inconsistent guidance risks unsafe operation. I grounded the vehicle pending engineering review. Troubleshooting and A/B Tests My home EVSEs successfully charge a different Tesla (Model Y). The subject VIN charges at DC fast charging (Supercharger) and once on a third‑party EVSE, but fails on my two home EVSEs thereafter. This localizes the issue to vehicle‑side AC charge path/charge‑port logic rather than the EVSE. Request OEM to provide CP waveform under load + Toolbox logs. Please log this safety‑related defect; aggregate with similar complaints, and, if appropriate, open an investigation into identity/integrity faults causing HV‑enable lockouts and conflicting service guidance | Crash: No Fire: No | Unknown |
| Feb 2026 | BACK OVER PREVENTION,FORWARD COLLISION AVOIDANCE | The rear camera malfunctions intermittently and causes other errors to happen, like Automatic emergency braking unavailable or forward collision warning unavailable. When the camera error happens, it says the camera is unavailable. I took my car to the Tesla dealership three times. The first time, they did a continuity check and said the harness was degraded, and they replaced the harness and the rear camera. A week later, it happened again. The second time they reset the camera calibration and it worked. The day after, it happened again. The car is at the Tesla dealership for the third time (02/20/2026). | Crash: No Fire: No | Unknown |
| Feb 2026 | POWER TRAIN | HVAC system which provides cooling/heating for all the systems including the powertrain, battery, inverters, Full-Self Driving computer malfunctions randomly shutting itself off due to a known issue of failing pressure and temperature sensors. Tesla is aware of this issue where the sensors may fail prematurely and in 2021 they issued a service bulletin SB-21-18-002. I was told It would be fixed with a software update... In other words it was never fixed. Now my car says that cooling and heating may randomly be unavailable due to invalid readings from the pressure and temperature sensors. They want me to pay to have the sensors replaced despite them acknowledging that they have a defect causing premature failure. This issue is safety related because in the event that I was supercharging and the HVAC system shuts down it could potentially lead to a battery fire or thermal runaway. Not to mention that the car left me without heat in subzero temperatures on a roadtrip. | Crash: No Fire: No | Unknown |
| Feb 2026 | STRUCTURE | I wrote several months ago about my 2021 tesla model 3 that the rear doors do not have any mechanical door handle release and is a big safety concern also how can a manufacturer get away with this and also not informing the consumer that anyone sat in the back may perish if involved in a accident and can't get out. | Crash: No Fire: No | Unknown |