2017 Toyota Mirai Problems
Owner-reported complaints filed with NHTSA, grouped by component
Data refreshed
What this page shows
Everything below is an owner-reported complaint submitted to NHTSA about the 2017 Toyota Mirai, grouped by the component NHTSA recorded on the report. These are not confirmed defects, and they are not recalls. NHTSA does not verify most reports before publishing them, and a category with more reports in it is not evidence that a part is defective.
Complaints are reports submitted by owners and drivers to NHTSA. They are not verified and do not establish that a defect exists.
Reports by component
Ranked by how many owner reports name each component category
- Brakes120.0%
- Driver assistance120.0%
- Fuel system120.0%
- Seat belts120.0%
- Visibility120.0%
Percentages are of component mentions. A single complaint can name more than one component, so these do not sum to the total complaint count.
Each component in detail
What the reports in each category say, in the owners' own words
Brakes
Reports naming service brakes, the antilock braking system, brake hoses, master cylinders or the parking brake.
From owner reports, verbatim
The automatic braking system will lock up when there is nothing in front of the car. It will not give a warning like it supposed to. I have gotten whiplash and I’ve hurt my back several times due to this incident. It has also caused major anxiety when driving the car. It’s almost caused an accident several times. The dealership keeps telling me that nothings wrong however the issue keeps happening. Nobody’s fixing it. A specialist has been checking it out and they also were not able to find anything however the issue is still happening. There have been no warning signs or messages when the brakes lock up for no reason.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Driver assistance
Reports naming forward-collision avoidance, lane keeping, back-over prevention, cruise control and related electronic driver-assistance systems.
From owner reports, verbatim
The automatic braking system will lock up when there is nothing in front of the car. It will not give a warning like it supposed to. I have gotten whiplash and I’ve hurt my back several times due to this incident. It has also caused major anxiety when driving the car. It’s almost caused an accident several times. The dealership keeps telling me that nothings wrong however the issue keeps happening. Nobody’s fixing it. A specialist has been checking it out and they also were not able to find anything however the issue is still happening. There have been no warning signs or messages when the brakes lock up for no reason.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Fuel system
Reports naming fuel storage or delivery — tanks, pumps, lines, injectors and fuel leaks.
From owner reports, verbatim
UNTIL TWO (2) DAYS AGO, I WAS THE HAPPY OWNER OF A 2017 TOYOTA MIRAI (VIN [XXX]). AT THE TIME OF MY INCIDENT, THE CAR HAD APPROXIMATELY 19,700 MILES ON THE ODOMETER. ON FRIDAY 24 AUGUST 2018 AT APPROXIMATELY 1615 (4:15 PM), I WAS DRIVING MY WIFE TO THE CLEANERS. I WAS ON ALMADEN EXPRESSWAY JUST SOUTH OF THE CAMDEN INTERSECTION IN A SOUTHERLY DIRECTION. SUDDENLY AND WITHOUT WARNING, THE CAR LOST POWER. THE CAR MONITOR SCREEN INSTRUCTED ME TO PULL OFF AS SOON AS POSSIBLE AND TO CONTACT MY CAR DEALER. I WAS INFORMED THAT I HAD AN FC FAILURE. AFTER THE CAR WAS TOWED TO THE DEALER, I WAS INFORMED BY THE DEALER THAT A SMALL ROCK HAD COMPLETELY PASSED THROUGH THE RADIATOR. THE TOYOTA MIRAI IS A HYDROGEN FUEL CELL VEHICLE. THERE IS NO INTERNAL COMBUSTION ENGINE. HYDROGEN FUEL FEEDS A FUEL CELL WHICH COMBINES THE HYDROGEN WITH FREE OXYGEN TO MAKE ELECTRICITY. THIS ELECTRICITY THEN POWERS TWO MOTORS AND/OR THE BATTERY. THE FUEL CELL REQUIRES A RADIATOR FOR COOLING. THIS RADIATOR IS THE ACHILLES HEEL OF THE MIRAI. IT IS PLACED LOW, IN FRONT, ON THE PASSENGER?S SIDE OF THE VEHICLE. THERE IS NO BUMPER TO PROTECT IT FROM COLLISIONS WITH CURBS. IN MY CASE, THERE IS NO PROTECTION FROM ROCKS AND GRAVEL HITTING THE RADIATOR AND DISABLING THE VEHICLE. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6). *TR
Too few reports in this category for a page of its own — they appear in the full complaint list.
Seat belts
Reports naming seat belts, buckles, retractors and pretensioners.
From owner reports, verbatim
THE CHILD SEAT LATCHES FOR CAR SEATS ARE NOT VISIBLE AND PRACTICALLY IMPOSSIBLE TO USE. BECAUSE OF THE DESIGN AND MATERIAL OF THE SEAT, IT TAKES A LOT OF STRENGTH AND EFFORT TO PROPERLY FIND THE LATCHES AND CONNECT THEM TO CAR SEATS. MY WIFE HAS TRIED SEVERAL TIMES TO CONNECT OUR CAR SEATS TO THE LATCH SYSTEM. IT DOESN'T MATTER WHICH CAR SEAT SHE TRIES IT WITH, SHE IS UNABLE TO CONNECT THE LATCH BECAUSE OF THE WAY THE SEAT IS DESIGNED AND THE AMOUNT OF STRENGTH YOU NEED TO HAVE BECAUSE OF THE WAY YOU HAVE TO CONNECT THE CAR SEATS. ON MOST CARS, I CAN CONNECT A CAR SEAT IN UNDER 5 MINUTES TO THE LATCHES. SOME CARS IN A MINUTE OR LESS. WITH THE MIRAI, IT TAKES ME 5-10 MINUTES TO GET THIS INSTALLED. THE LATCHES WERE MADE MANDATORY TO ASSIST PEOPLE WITH EASE OF CAR SEAT INSTALLATION BUT THE DESIGN OF THE MIRAI HAS MADE IT NEARLY IMPOSSIBLE AND IMPOSSIBLE FOR PEOPLE WHO ARE NOT STRONG ENOUGH TO MANUVER THE SEAT AND JAM THE CAR SEAT CLIPS THOUGH THE SEAT BOTTOM.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Visibility
Reports naming windshields, glass, wipers, defrosters and mirrors.
From owner reports, verbatim
TL* THE CONTACT OWNS A 2017 TOYOTA MURAI. WHILE DRIVING AT ANY SPEED, THE DASHBOARD REFLECTED ON THE SIDE VIEW MIRRORS, WHICH MADE IT DIFFICULT TO SEE. THE DEALER (SAN FRANCISCO TOYOTA IN SAN FRANCISCO, CA, 415-559-1981) WAS UNABLE TO DIAGNOSE THE FAILURE AND STATED THAT THE FAILURE WOULD BE REPORTED TO THE MANUFACTURER. THE MANUFACTURER WAS AWARE OF THE FAILURE, BUT DID NOT RETURN THE CALL, AS PROMISED. THE FAILURE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS APPROXIMATELY 1,000. THE VIN WAS NOT PROVIDED.....UPDATED 12/11/17 *BF *TT
Too few reports in this category for a page of its own — they appear in the full complaint list.
Higher-selling and older vehicles accumulate more reports. Counts are not failure rates and are not directly comparable between vehicles that sold in very different numbers.
Elsewhere on this vehicle
Data sources
- NHTSA Office of Defects Investigation — owner-reported complaints and the components recorded on them
Data on this page last refreshed .