ToyotaMirai2021Overview/toyota/mirai/2021/base/

2021 Toyota Mirai

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2021 Mirai.

The 2021 Toyota Mirai enters its model-year reliability record with a notably light footprint: a single owner complaint filed against the fuel/propulsion system and one recall on file. Those numbers match the 2020 model year for the lowest complaint count logged across the 2016–2025 coverage span, and they stand in sharp contrast to the 2022 model year, which drew the period's highest total of ten complaints. For a researcher, the 2021 anchors a quiet pocket in the model's complaint history, offering a baseline reading against the volatility that emerged the following year.

Model year202520242023202220212020201920182017

Fitment & sizes

Replacement part sizes and factory part numbers — battery, bulbs, filters and belts.

From the factory this vehicle uses a BCI 47 · 345 CCA battery. Each part links to every other vehicle that shares it, so a part you already stock may fit more of your fleet than you'd expect.

Battery groupBCI 47 · 345 CCAOEM · verified
Tire size235/55R19 101VOEM · verified
Wheel / rim8, Optional: 8.5 inOEM · verified

OE service part numbers OEM · verified

Cabin air filter8713950110

Full specifications

Engine, drivetrain, dimensions and economy.

Dimensions & weight NHTSA vPIC

Overall length195.7 in
Overall width74 in
Overall height57.9 in
Wheelbase115 in
Curb weight4255 lb
Track (front / rear)63.4 / 63 in
Weight distribution (front / rear)49/51

Performance & power Independent road tests

0–60 mph, quarter-mile, horsepower and torque from independent road tests.

Independent road tests for the Mirai of this era, listed by trim and engine — this page spans more than one engine, so no single horsepower figure is shown.

7.4–7.6 sec0–60 mph (tested)quickest 7.40 sec — 2021 XLE Sedan
YearTrim / engine0–60¼ mileHPDrivetrain
2021XLE Sedan Electric7.40 sec15.80 sec182 hpRWD
2021XLE Sedan Electric7.60 sec16.00 sec182 hpRWD

Service quick specs OEM factory data

Capacities, torques and tune-up values from the factory service manual.

Battery & A/C

Standard BCI Group Number47
Standard BCI Cranking Performance345 cca

Factory maintenance schedule OEM · verified

Normal service, condensed from the factory interval matrix.

Under the factory schedule, replace the coolant at 150,000 mi. The big-interval services (at 150,000 mi for coolant, and the transmission fluid) are the ones owners most often skip — on a lower-mileage example, assume the original fluids are still in it and check them first.

Every 5,000 miBrake System (inspect) · Floor Mat (inspect) · Hybrid Battery Compartment Air Filter (inspect) · Tire & Wheel Assembly (rotate) · Universal Vehicle Operation (inspect all fluid levels) · Windshield Wiper Blade (inspect)
Every 10,000 miCabin Air Filter (replace) · Fuel Line (inspect) · Fuel Tank (inspect)
Every 15,000 miBrake Line (inspect) · CV Joint Boot (inspect) · Engine Coolant System (inspect fluid level) · Hybrid Inverter (inspect coolant level) · Steering Gear Box Assembly (inspect) · Steering Linkage (inspect)
Every 30,000 miBrake Drum Assembly (inspect) · Brake Linings (inspect) · Brake Rotor (inspect) · Engine Air Filter Element (replace) · Fuel Filter (replace) · Transmission Assembly (leak inspection)
Every 60,000 miEngine Breather Filter (replace)
At 150,000 miHybrid Inverter (drain, flush & refill coolant)
At 200,000 miHybrid Inverter (drain, flush & refill coolant)

Reliability & federal safety record

Owner-reported issues, recalls, investigations and service bulletins on record with NHTSA — an unfiltered look at what owners actually experience.

The 2021 Mirai sits at the low‑end of complaint volume (1 complaint) but marks the first appearance of a federal recall in the generation, while earlier model years (2016‑2020) recorded zero recalls. Compared with the preceding trend of declining Technical Service Bulletins (TSBs) from 197 in 2016 to 111 by 2020, 2021’s TSB count rises modestly to 119, suggesting a slight uptick in service advisories despite stable complaint numbers. After 2021 the pattern shifts upward: complaints jump to 10 in 2022 and recalls increase to two by 2023, indicating growing reliability concerns in later years. Because 2021 shows only a single fuel/propulsion‑system complaint and no crash or fire reports, it represents a relatively quiet point before the later rise in issues. **Takeaway:** 2021 is a comparatively safe year within the Mirai’s early‑generation record, making it a reasonable choice for a used purchase, provided the specific recalled component is addressed.

1
Open recalls
NHTSA campaigns
119
Service bulletins
Manufacturer communications
0
ODI investigations
Office of Defects Investigation
1
Owner complaints
0 involved a crash · 0 a fire
Owner complaints by model year NHTSA · this generation & adjacent

Owner complaints filed with NHTSA, by component

All 1 complaints on record, top 1 components.

Fuel/Propulsion System1

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 1 of 1 campaigns on record for this vehicle.

22V239000Electronic Stability Control (Esc):Control Module:SoftwareReported 13/04/2022

Toyota Engineering & Manufacturing (Toyota) is recalling certain 2022 Lexus LX 600, Lexus NX 350h, Lexus NX 450h+, Toytoa RAV4 Hybrid, 2021-2022 Lexus LS 500h, Toyota Mirai, RAV4 PRIME, Sienna, Venza, and 2020-2022… Remedy: Dealers will update the Skid Control ECU software, free of charge. Owner notification letters were mailed May 27, 2022. Owners may contact Toyota customer service at…

Technical service bulletins NHTSA · verified

Showing 5 of 119 bulletins on record with NHTSA.

BulletinDateComponentSummary
26TE032026-05-07EngineAlthough the Mirai Electric Heater Assemblies are covered by Toyota’s New Vehicle Limited…
26TE032026-05-06EngineTECHNICAL INSTRUCTIONS FOR 26TE03 ELECTRIC HEATER SUB-ASSEMBLY REPLACEMENT CERTAIN 2021…
T-SB-0106-22 Rev22026-01-30Electrical SystemOBSOLETE NOTICE January 30, 2026: This bulletin is now obsolete. Please see T-SB-0001-26.
T-SB-0001-262026-01-28Electrical SystemSome 2018 – 2024 model year Toyota vehicles equipped with a Premium Audio with Dynamic…
T-SB-0055-24 Rev22026-01-07Unknown Or OtherSome 2005 – 2026 Toyota vehicles that have undergone water intrusion may exhibit a…

Common OBD-II trouble codes

The most common OBD-II codes for this vehicle's emissions system. These are standardized SAE J2012 definitions, not vehicle-specific fault reports.

P0420
Catalyst system efficiency below threshold — Bank 1
P0300
Random / multiple cylinder misfire detected
P0171
System too lean — Bank 1
P0455
Evaporative emission system leak detected — large leak
P0128
Coolant thermostat below regulating temperature
P0442
Evaporative emission system leak detected — small leak

VIN tools

Decode factory build data for a specific vehicle by VIN.

VIN
Decode a VIN to confirm the transmission and build data for a specific Mirai. OEM
Build data
Plant, GVWR class, engine and body data for any 17-character VIN.
Recalls
Check open recall campaigns against a specific vehicle by VIN.

Vehicles with shared specs

Find every vehicle that shares this one's battery, bulbs, oil capacity, platform or parts.

Reference guides

Cross-vehicle references for the kinds of data on this page.

Frequently asked

Does the 2021 Mirai have open recalls?

NHTSA lists 1 recall campaign(s) for this model year. Check your specific vehicle by VIN.