AI DamageToyota Mirai: problems, complaints, bulletins
Summary for the Toyota Mirai across 11 model years: 30 owner complaints and 348 NHTSA service bulletins, plus repair videos. Pick a year for details.
Model years
What fails most often
- 1 Forward collision avoidance 33% of all complaints
- 2 Fuel/propulsion system 33% of all complaints
- 3 Vehicle speed control 20% of all complaints
- 4 Electrical system 13% of all complaints
- 5 Engine 10% of all complaints
- 6 Service brakes 10% of all complaints
- 7 Air bags 7% of all complaints
- 8 Powertrain 7% of all complaints
- Forward collision avoidance: 10 complaints (33% of all), 2 of them with a crash reported by the owner; manufacturer bulletins for this component: 5.
- Fuel/propulsion system: 10 complaints (33% of all).
- Vehicle speed control: 6 complaints (20% of all), 2 of them with a crash reported by the owner; manufacturer bulletins for this component: 10.
- Electrical system: 4 complaints (13% of all); manufacturer bulletins for this component: 229.
- Engine: 3 complaints (10% of all); manufacturer bulletins for this component: 45.
Engines and transmissions
US-market versions per EPA. On the right: how many NHTSA complaints name this engine or transmission type.
- petrol 2016–2026
- CVT 2016–2026
Drive: RWD, FWD
Symptoms owners describe
How many of the 30 NHTSA complaints mention each symptom (automatic count from complaint text; one complaint can mention several).
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Forward collision avoidance | 10 | 2 | 5 |
| Fuel/propulsion system | 10 | 0 | 0 |
| Vehicle speed control | 6 | 2 | 10 |
| Electrical system | 4 | 0 | 229 |
| Engine | 3 | 0 | 45 |
| Service brakes | 3 | 1 | 23 |
| Air bags | 2 | 0 | 21 |
| Powertrain | 2 | 0 | 0 |
| Backover prevention | 1 | 1 | 30 |
| Visibility | 1 | 0 | 10 |
| Steering | 1 | 1 | 8 |
| Lane departure | 1 | 0 | 5 |
| Seat belts | 1 | 0 | 3 |
| Equipment | 0 | 0 | 252 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
- Emergency braking system did not function, nor was there any displayed on the dashboard (as it usually does) on 2022 Mirai with about 17500 miles and under 18 months since purchase - Vehicle is available for inspection - Car resulted in an accident - my car hit the car in front (rear ended the front car) -…
I tried to turn at the curve during the exit, but the car lost power steering, I could not turn the steering wheel, and ended up hitting the wall.
I was backing up my car very slowly from my friend's drive way to center of street, all the sudently the car lost control, keep backing up with very fast speed 360 degree to hit neighber's front yard wall and concrete street light. back of my car smasshed and total lost.
What component or system failed or malfunctioned, and is it available for inspection upon request? Car suppposed to stop itself as it has all sensors. Still car rear ended other car. How was your safety or the safety of others put at risk? Jeopardy. Since accident occured in residential area my family was okay.
While driving in traffic, my 2023 Toyota Mirai suffered a sudden and total loss of motive power. The vehicle became completely unresponsive while in 'Drive', presenting a severe safety hazard.
The vehicle relies on hydrogen fuel, but hydrogen stations in California are frequently unavailable or offline. Many stations are closed or out of fuel for extended periods. In addition, the price of hydrogen fuel has increased dramatically (approximately three times higher than when the vehicle was purchased).
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
What to check before buying
- Forward collision avoidance. Radar and camera: calibration after bumper or windshield replacement.
- Fuel/propulsion system. Fuel smell, leaks, rough running, fuel-system codes.
- Vehicle speed control. Accelerator pedal, cruise control, throttle codes.
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
Manufacturer service bulletins
Bulletin titles as filed with NHTSA.
- Some 2022 model year Mirai vehicles are equipped with Toyota Teammate Advanced Drive
- OBSOLETE NOTICE August 20, 2026
- This bulletin includes basic procedures for performing a rescue charge at battery on high voltage (HV)…
- 2026 model year Toyota vehicles are equipped with driver side floor mat retainers to secure the floor mat…
- During the manufacturing process, tires are mounted on the vehicle as matched sets to help reduce…
- A battery in a stored vehicle is subject to conditions that can reduce its performance and service life
- Long-term or off-site storage requires special care to maintain vehicle condition
- Although the Mirai Electric Heater Assemblies are covered by Toyota’s New Vehicle Limited Warranty for 3…
- TECHNICAL INSTRUCTIONS FOR 26TE03 ELECTRIC HEATER SUB-ASSEMBLY REPLACEMENT CERTAIN 2021 - 2024 MIRAI
- OBSOLETE NOTICE February 12, 2026
- OBSOLETE NOTICE February 6, 2026
- OBSOLETE NOTICE February 03, 2026
Other models of this make
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-04.