2023 TOYOTA Mirai Problems

Complaints Reported

Complaints by Component

VEHICLE SPEED CONTROL,FORWARD COLLISION AVOIDANCE

1 complaint

See attached document for complaint.

Oct 08, 2025

POWER TRAIN,FUEL/PROPULSION SYSTEM

1 complaint

Summary of Issue: I am the owner of a Toyota Mirai that suffered a sudden loss of power due to contaminated hydrogen fuel. The incident rendered the vehicle undrivable and raised serious safety concerns, as loss of propulsion in a fuel-cell vehicle can occur without warning while in motion. The vehicle was taken to Toyota of [XXX] for diagnosis and repair, where Toyota confirmed the presence of contaminated fuel. Toyota’s Stance: According to Toyota, the contamination issue was addressed by flushing the contaminated hydrogen from the system and refueling the vehicle. Toyota has stated that this process has restored power and that the company does not accept responsibility for any damage caused by the contamination. They have not disclosed any data on the type or level of contamination found, nor have they provided a written service report detailing inspection results or long-term corrective actions. Owner Concern: Independent research and fuel-cell engineering references indicate that contaminants such as sulfur compounds, carbon monoxide, or heavy metals can permanently degrade or “poison” the fuel-cell stack. Flushing alone cannot reverse such chemical or structural damage. As a result, there is a risk of future performance loss or total stack failure. Without transparency from Toyota regarding contaminant analysis or verification of system integrity, I cannot consider this vehicle safe or reliable to drive. Request for Resolution: I am requesting that Toyota: Provide complete written documentation of the contaminant analysis and testing performed on my vehicle. Disclose the long-term plan for ensuring the fuel-cell stack and related components have not been compromised. Offer either a full buyback/repurchase under applicable consumer protection laws or a complete fuel-cell stack replacement verified by engineering inspection. Until Toyota provides a documented, technically valid repair or an official buyback offer, this issue remains unresolved INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Oct 07, 2025

UNKNOWN OR OTHER

1 complaint

The warning that is supposed to appear every time the car is started that the car will auto shut off after one hour of idling never once appeared. As a result, my husband did not know the auto shut off feature existed on his car. He fell asleep in his car on a hot summer day and when the car auto shut off after an hour, he died of heatstroke. The lack of a warning coupled with the car auto shutting off after an hour was reproduced and confirmed by an independent service center. The car has not been inspected by anyone else. There were no warnings, messages, or other problems prior to my husband’s death. He was not informed of the auto shut off feature at the dealership at the time of purchase and the dashboard warning never once appeared to alert him such a feature existed. He thought it was safe to sleep in his running car. The auto shut off feature does not work properly as there was no warning on the dashboard and does not safeguard against people or animals being in the car at the one hour mark. Toyota needs to know this is a deadly feature and make some serious changes.

Sep 06, 2024

FUEL/PROPULSION SYSTEM

1 complaint

The vehicle has an advertised driving range by Toyota of 402 miles , depending on that information as true I attempted a trip about that range . During this trip and all other driving times I have never got more then 260 miles of range .

Jan 10, 2024

⭐

4.7/5.0

50 reviews

Frequently Asked Questions

How many problems does the 2023 TOYOTA Mirai have?

The 2023 TOYOTA Mirai currently has 4 owner-reported complaints according to NHTSA database. These complaints are organized by component to help identify common issues.

What are the most common problems with 2023 TOYOTA Mirai?

The most common problems reported for the 2023 TOYOTA Mirai are organized by component above. Each component section shows owner-reported issues, crash reports, and fire incidents to help identify patterns and problem areas.

Where does this 2023 TOYOTA Mirai problem data come from?

All problem and complaint data for the 2023 TOYOTA Mirai comes directly from the National Highway Traffic Safety Administration (NHTSA) database. These are real complaints submitted by actual vehicle owners.