AutoUtility currently tracks 2 official NHTSA owner defect complaints for the 2018 Toyota Mirai. Fuel & Propulsion System issues are the most frequently reported category, appearing in 1 complaint (50% of submitted records). Zero crashes, fires, injury reports, or fatality reports are cited across these complaint records.

Key Problem Findings
  • • Total NHTSA Complaints: 2 reports
  • • #1 Reported Problem Area: Fuel & Propulsion System (1 reports • 50% of submitted complaints)
  • • Secondary Problem Areas: Driver Assistance & Safety Tech (1), Brakes & Traction Control (1)
  • • Crash-Citing Complaints: 0 filings
  • • Fire-Citing Complaints: 0 filings
  • • Complaints Reporting Injuries / Fatalities: 0 injury filings • 0 fatality filings
Reporting Methodology: Statistics describe unverified consumer submissions voluntarily filed with NHTSA. Complaint volume is not normalized for vehicle sales volume or miles driven. Multiple components can be cited within a single owner complaint submission.
Total Complaints
2
Submitted to NHTSA ODI
Crash-Citing Complaints
0
Filings citing a collision
Fire-Citing Complaints
0
Filings citing smoke or fire
Complaints Reporting Injuries
0
Filings citing one or more injuries
Complaints Reporting Fatalities
0
Consumer filings citing fatalities

Most Reported Problems for 2018 Toyota Mirai

Top automotive subsystem defect categories ranked by unique owner complaint volume in federal records

#1 Problem Area 50% of complaints

Fuel & Propulsion System

1 owner complaint submitted to NHTSA ODI
✓ 0 crashes or fires cited
#2 Problem Area 50% of complaints

Driver Assistance & Safety Tech

1 owner complaint submitted to NHTSA ODI
✓ 0 crashes or fires cited
#3 Problem Area 50% of complaints

Brakes & Traction Control

1 owner complaint submitted to NHTSA ODI
✓ 0 crashes or fires cited
Domain Share Note: Share percentage represents the proportion of unique complaint filings referencing each vehicle system. Because single complaints may cite multiple systems (such as engine and electrical simultaneously), domain percentages represent individual category incidence and may sum to over 100%.

Recent NHTSA Owner Reports for 2018 Toyota Mirai

Representative defect filings submitted by owners to the NHTSA Office of Defects Investigation

Fuel & Propulsion System NHTSA ODI ID: #11722227
Filed: 03/05/2026

"I own a 2018 Toyota Mirai in California financed through Toyota Financial. 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..."

Incident Date: 03/03/2026 • Raw NHTSA Component: UNKNOWN OR OTHER,FUEL/PROPULSION SYSTEM
Driver Assistance & Safety Tech NHTSA ODI ID: #11698689
Filed: 11/11/2025

"On several occasions the Toyota Mirai would slam on the brakes on its own while at a considerable speed with no other cars around. It was very scary and concerning traveling at high speeds and the brakes being applied abruptly automatically."

Incident Date: 01/09/2024 • Raw NHTSA Component: SERVICE BRAKES,FORWARD COLLISION AVOIDANCE
Consumer Narrative Notice: Excerpts are sanitized text descriptions submitted by vehicle owners to the federal ODI database. They reflect the reporting consumer's observations at the time of filing and have not been independently confirmed by vehicle manufacturers or government investigators.

Complaint History for Toyota Mirai

Reported defect complaint volume across sibling model years (2016–2026)

Model Year NHTSA Complaints Crash Reports Safety Recalls Detailed Report
2016 Toyota Mirai 2 0 0 View 2016 Problems →
2017 Toyota Mirai 4 0 0 View 2017 Problems →
2018 Toyota Mirai Current Page 2 0 0 Current
2019 Toyota Mirai 4 1 0 View 2019 Problems →
2020 Toyota Mirai 1 1 0 View 2020 Problems →
2021 Toyota Mirai 1 0 1 View 2021 Problems →
2022 Toyota Mirai 10 2 1 View 2022 Problems →
2023 Toyota Mirai 6 0 2 View 2023 Problems →
2024 Toyota Mirai 0 0 2 View 2024 Problems →
2025 Toyota Mirai 0 0 1 View 2025 Problems →
2026 Toyota Mirai 0 0 0 View 2026 Problems →
Comparative Disclaimer: Complaint totals are unadjusted historical counts and are not normalized for vehicles sold, active fleet size, or total road mileage. Newer model years naturally have had less calendar exposure time to accumulate owner filings.

Detailed NHTSA Component Breakdown for 2018 Toyota Mirai

Complete distribution of consumer defect reports across all 2 granular NHTSA system and subsystem classifications

Vehicle Component / System Total Complaints Crash Reports Fire Reports Reported Injury Entries Reported Fatality Entries
SERVICE BRAKES,FORWARD COLLISION AVOIDANCE 1 0 0 0 0
UNKNOWN OR OTHER,FUEL/PROPULSION SYSTEM 1 0 0 0 0
Data Attribution & Reporting Methodology: Complaints are unverified voluntary submissions to the NHTSA Office of Defects Investigation (ODI). Because multiple vehicle components can be cited within a single owner complaint submission, component-level rollups may sum to more than the unique complaint count (2). Injury and fatality entries in the detailed table reflect raw values entered by reporting consumers across individual submissions; they are not deduplicated casualty statistics and may include duplicate or unverified entries. Complaint volume is not normalized for sales volume or vehicle mileage and does not represent an audited component failure rate.

Related Official Reports for 2018 Toyota Mirai

Cross-reference safety recalls, crash test safety ratings, and EPA fuel economy for this model year

Official US Government Data Provenance

The complaint records on this page are retrieved directly from the NHTSA Office of Defects Investigation (ODI) public database.

Local Production Store Compiled: August 2026 • Deterministic Audited Dataset • Zero Dynamic External API Runtime Latency.