2021 TOYOTA MIRAI battery

SAFETY PRECAUTIONS
Your Mirai Fuel Cell has both high-voltage DC and AC systems, as well as a 12-volt system.
Both DC and AC high voltage are very dangerous and can cause personal injury, severe
burns, electric shock and even fatal injury.
To avoid personal injury, please follow all caution labels attached to high-voltage parts.
Do not touch or attempt to remove or replace any high-voltage (orange-colored) wiring
and connectors. Do not touch the service plugs located on top of the high voltage traction
battery and fuel cell stack assemblies.
If an accident occurs, do not touch any high-voltage wiring, connectors or parts, such as the
under hood inverter with converter assembly or the high voltage traction battery assembly.
Do not touch the potassium hydroxide electrolyte that might spill or leak from the high
voltage traction battery as the result of an accident. If potassium hydroxide electrolyte
gets on your skin or in your eyes, neutralize it immediately with a saturated boric acid
solution (ratio: 80 grams boric acid to two liters water). Seek immediate medical attention.
The hydrogen gas is flammable, and can ignite within a large range of concentrations
(4 to 74.5%). However, it diffuses easily and tends not to remain near the ground. If the
sound of hydrogen leaking (a loud hissing sound) can be heard, immediately step away
from the vehicle as there is a chance that the hydrogen gas may ignite.
Water is recommended as the extinguishing agent for vehicle fires except for hydrogen
and/or high voltage traction battery fires, which should be allowed to burn out.
The Toyota Mirai Fuel Cell is being offered in limited quantities. While non-powertrain
and non-fuel cell component warranty service can be performed by any Toyota
dealership, powertrain warranty service and fuel cell component warranty service
must only be performed by an authorized Mirai Fuel Cell Toyota dealership.
To locate your nearest authorized Mirai Fuel Cell Toyota dealership, log on to
www.toyota.com or contact the Toyota Brand Engagement Center at (800) 331-4331.

12
* Exception of the Hybrid Battery Pack Warranty coverage of 10 years/150,000 miles, whichever occurs first.
WARRANTY COVERAGE AT A GLANCE
Your Warranties in Detail
GENERAL WARRANTY PROVISIONS
WARRANTY

13
* Exception of the Hybrid Battery Pack Warranty coverage of 10 years/150,000 miles, whichever occurs first.

WHAT IS COVERED
AND HOW LONG
Basic Warranty
This warranty covers repairs and
adjustments needed to correct defects
in materials or workmanship of any
part supplied by Toyota, subject to the
exceptions indicated under “What
Is Not Covered” on pages 14–15.
Coverage is for 36 months or 36,000 miles,
whichever occurs first, with the exception of
air conditioning recharge, wheel alignment
and wheel balancing, which are covered for 12
months or 12,000 miles, whichever occurs first.
Fuel Cell System Warranty
This warranty covers repairs needed to
correc t defects in materials or workmanship
of the components listed here and supplied
by Toyo t a , subject to the exceptions indicated
under “What Is Not Covered” on pages 14-15 .
The Fuel Cell System Warranty is in effect for
8 years or 100,000 miles from the vehicle’s
in-service date, whichever occurs first for the
following components:
• Fuel cell air compressor
•
F
uel cell boost converter
•

F
uel cell ECU
•

F
uel cell hydrogen tanks
•

F
uel cell power control unit (PCU)
•

F
uel cell stack
•

H
ybrid battery ECU (battery voltage sensor)
•

H
ybrid battery pack*
•

Hybrid contro l module (power management
control module)
•

H
ydrogen fueling ECU


Powertrain Warranty
This warranty covers repairs needed to
correct defects in materials or workmanship
of any component listed below and in the

next column and supplied by Toyota, subject
to the exceptions indicated under “What Is
Not Covered” on pages 14–15.
Coverage is for 60 months or 60,000 miles,
whichever occurs first.
Transaxle and Mounts
Case and all internal parts, transaxle mounts,
seals and gaskets
.
Front-Wheel-Drive Systems
Axle shaft, hub, bearings, seals and gaskets.
Restraint Systems Warranty
This warranty covers repairs needed to
correct defects in materials or workmanship
of any seatbelt or airbag system supplied by
Toyota, subject to the exceptions indicated
under “What Is Not Covered” on pages 14–15.
Coverage is for 60 months or 60,000 miles,
whichever occurs first.
For vehicles sold and registered in the
state of Kansas, the warranty for seatbelts
and related components is 10 years,
regardless of mileage.
NEW VEHICLE LIMITED WARRANTY
Your Warranties in Detail
WARRANTY

26
5,000 miles or 6 months
■ Check installation of driver’s floor mat
■ Inspect and adjust all fluid levels1
■Inspect FC HV battery cooling intake filter2
■Inspect wiper blades
■Rotate tires
■ Visually inspect brake linings/drums
and brake pads/discs
Additional Maintenance Items for
Special Operating Conditions3
Driving on dirt roads or dusty roads: ■Inspect ball joints and dust covers
■Inspect drive shaft boots
■Inspect fuel cell air filter
■Inspect steering linkage and boots
■ Tighten nuts and bolts on chassis
and body
Extensive idling and/or low speed driving
for a long distance such as police, taxi
or door-to-door delivery use:
■ Inspect hydrogen supply system for
leaks and damage
■ Inspect hydrogen tank (with valve)
for leaks and damage
■Inspect hydrogen tank band for damage
Driving while towing, using a car-top
carrier, or heavy vehicle loading:
4
■ Tighten nuts and bolts on chassis
and body
Operating on rough or muddy roads, or
roads with melted snow:
■ Inspect hydrogen supply system for
leaks and damage
■ Inspect hydrogen tank (with valve) for
leaks and damage
■Inspect hydrogen tank band for damage
10,000 miles or 12 months
■Check installation of driver’s floor mat
■Inspect and adjust all fluid levels1
■Inspect FC HV battery cooling intake filter2
■Inspect wiper blades
■Replace cabin air filter
■Rotate tires
■ Visually inspect brake linings/drums
and brake pads/discs
Inspect the following:
■Fuel cell air filter
■Fuel cell cooling system for leaks
■Hydrogen sensor
■ Hydrogen supply system for leaks
and damage
■ Hydrogen tank (with valve) for leaks
and damage
■ Hydrogen tank band for looseness
and damage
Additional Maintenance Items for
Special Operating Conditions3
Driving on dirt roads or dusty roads: ■Inspect ball joints and dust covers
■Inspect drive shaft boots
■Inspect steering linkage and boots
■ Tighten nuts and bolts on chassis
and body
Driving while towing, using a car-top
carrier, or heavy vehicle loading:
4
■ Tighten nuts and bolts on chassis
and body

Dealer Service verification:
D
ate: Mileage:
Dealer Service verification:
D
ate: Mileage:
Maintenance Log
MAINTENANCE LOG
MAINTENANCE

27
15,000 miles or 18 months
■Check installation of driver’s floor mat
■Inspect and adjust all fluid levels1
■Inspect FC HV battery cooling intake filter2
■Inspect wiper blades
■ Rotate tires ■ Visually inspect brake linings/drums and brake pads/discs
Inspect the following:
_ B

all joints and dust covers
_ B

rake lines and hoses
_ Dr

ive shaft boots
_ Fuel cell coolant level

Additional Maintenance Items for Special Operating Conditions3
Driving on dirt roads or dusty roads: ■Replace fuel cell air filter
■Tighten nuts and bolts on chassis and body
Extensive idling and/or low speed driving for a long distance such as po\
lice, taxi or
door-to-door delivery use:
■Inspect hydrogen supply system for leaks and damage
■Inspect hydrogen tank (with valve) for leaks and damage
■Inspect hydrogen tank band for damage
Driving while towing, using a car-top carrier, or heavy vehicle loading:4
■Tighten nuts and bolts on chassis and body
Operating on rough or muddy roads, or roads with melted snow: ■Inspect hydrogen supply system for leaks and damage
■Inspect hydrogen tank (with valve) for leaks and damage
■Inspect hydrogen tank band for damage
1 Inspect sealed transmissions, transfer cases and differentials for signs of leakage. If any leakage from a sealed component is suspected, it is recommended that you have the sealed component inspected by a Toyota dealer. Inspect
power steering fluid (if equipped) and brake fluid level/condition. Inspect engine and inverter (if equipped) coolant
level/condition/freezing point. Your dealer may recommend services (Dealer-Recommended Maintenance) based on
inspection results.
2 Visually check the FC HV battery cooling intake filter for dirt or dust every 5,000 miles and clean if necessary. Clean every
20,000 miles.
3 P erform these service items only if you drive primarily under the conditions indicated.4 N ot all vehicles are designed for towing. Refer to your Vehicle Owner’s Manual for details.
_ Inverter coolant level
_ Steering gear
_ Steering linkage and boots
Dealer Service verification:
D
ate: Mileage:
Maintenance Log
MAINTENANCE LOG
MAINTENANCE

28
20,000 miles or 24 months
■Check installation of driver’s floor mat
■Clean FC HV battery cooling intake filter2
■Inspect and adjust all fluid levels1
■Inspect wiper blades
■Replace cabin air filter
■Rotate tires
■ Visually inspect brake linings/drums
and brake pads/discs
Inspect the following: ■Fuel cell air filter
■ Fuel cell cooling system for leaks
■Hydrogen sensor
■ Hydrogen supply system for leaks
and damage
■ Hydrogen tank (with valve) for leaks
and damage
■ Hydrogen tank band for looseness
and damage

■Additional MainteAdditional Maintenance Items for
Special Operating Conditions3
Driving on dirt roads or dusty roads: ■Inspect ball joints and dust covers
■Inspect drive shaft boots
■Inspect steering linkage and boots
■ Tighten nuts and bolts on chassis
and body
Driving while towing, using a car-top
carrier, or heavy vehicle loading:
4
■ Tighten nuts and bolts on chassis
and body




25,000 miles or 30 months
■Check installation of driver’s floor mat
■Inspect and adjust all fluid levels1
■Inspect FC HV battery cooling intake filter2
■Inspect wiper blades
■Rotate tires
■ Visually inspect brake linings/drums
and brake pads/discs
Additional Maintenance Items for
Special Operating Conditions3
Driving on dirt roads or dusty roads: ■Inspect ball joints and dust covers
■Inspect drive shaft boots
■Inspect fuel cell air filter
■Inspect steering linkage and boots
■ Tighten nuts and bolts on chassis
and body
Extensive idling and/or low speed driving
for a long distance such as police, taxi
or door-to-door delivery use:
■ Inspect hydrogen supply system for
leaks and damage
■ Inspect hydrogen tank (with valve)
for leaks and damage
■Inspect hydrogen tank band for damage
Driving while towing, using a car-top
carrier, or heavy vehicle loading:
4
■ Tighten nuts and bolts on chassis
and body
Operating on rough or muddy roads, or
roads with melted snow:
■ Inspect hydrogen supply system for
leaks and damage
■ Inspect hydrogen tank (with valve) for
leaks and damage
■Inspect hydrogen tank band for damage
Dealer Service verification:
D
ate: Mileage:
Dealer Service verification:
D
ate: Mileage:
Maintenance Log
MAINTENANCE LOG
MAINTENANCE

29
30,000 miles or 36 months
■Check installation of driver’s floor mat
■Inspect and adjust all fluid levels1
■Inspect FC HV battery cooling intake filter2
■Inspect wiper blades
■Replace cabin air filter
■Replace fuel cell air filter
■Replace ion exchanger element
■Rotate tires
Inspect the following:
_ B

all joints and dust covers
_ B

rake lines and hoses
_ B

rake linings/drums and
brake pads/discs
5
_ Dr ive shaft boots
_F

uel cell coolant level
_ F

uel cell cooling system for leaks
_ H

ybrid transaxle for signs of leakage
_H

ydrogen sensor
Additional Maintenance Items for Special Operating Conditions3
Driving on dirt roads or dusty roads: ■Tighten nuts and bolts on chassis and body
Driving while towing, using a car-top carrier, or heavy vehicle loading:4
■Tighten nuts and bolts on chassis and body
1 Inspect sealed transmissions, transfer cases and differentials for signs of leakage. If any leakage from a sealed component is suspected, it is recommended that you have the sealed component inspected by a Toyota dealer. Inspect
power steering fluid (if equipped) and brake fluid level/condition. Inspect engine and inverter (if equipped) coolant
level/condition/freezing point. Your dealer may recommend services (Dealer-Recommended Maintenance) based on
inspection results.
2 Visually check the FC HV battery cooling intake filter for dirt or dust every 5,000 miles and clean if necessary. Clean every
20,000 miles.
3 P erform these service items only if you drive primarily under the conditions indicated.4 N ot all vehicles are designed for towing. Refer to your Vehicle Owner’s Manual for details.5 Inspect thickness measurement and disc runout.
Dealer Service verification:
D
ate: Mileage:
_ H ydrogen supply system for leaks
and damag
e
_ H ydrogen tank (with valve) for leaks
and damage
_ H

ydrogen tank band for looseness
and damage
_ I

nverter coolant level
_ S

teering gear
_S

teering linkage and boots
Maintenance Log
MAINTENANCE LOG
MAINTENANCE

30
35,000 miles or 42 months
■ Check installation of driver’s floor mat
■ Inspect and adjust all fluid levels1
■Inspect FC HV battery cooling intake filter2
■Inspect wiper blades
■Rotate tires
■ Visually inspect brake linings/drums
and brake pads/discs
Additional Maintenance Items for
Special Operating Conditions3
Driving on dirt roads or dusty roads: ■Inspect ball joints and dust covers
■Inspect drive shaft boots
■Inspect fuel cell air filter
■Inspect steering linkage and boots
■ Tighten nuts and bolts on chassis
and body
Extensive idling and/or low speed driving
for a long distance such as police, taxi
or door-to-door delivery use:
■ Inspect hydrogen supply system for
leaks and damage
■ Inspect hydrogen tank (with valve)
for leaks and damage
■Inspect hydrogen tank band for damage
Driving while towing, using a car-top
carrier, or heavy vehicle loading:
4
■ Tighten nuts and bolts on chassis
and body
Operating on rough or muddy roads, or
roads with melted snow:
■ Inspect hydrogen supply system for
leaks and damage
■ Inspect hydrogen tank (with valve) for
leaks and damage
■Inspect hydrogen tank band for damage
40,000 miles or 48 months
■Check installation of driver’s floor mat
■Clean FC HV battery cooling intake filter2
■Inspect and adjust all fluid levels1
■Inspect wiper blades
■Replace cabin air filter
■Rotate tires
■ Visually inspect brake linings/drums
and brake pads/discs
Inspect the following:
■Fuel cell air filter
■Fuel cell cooling system for leaks
■Hydrogen sensor
■ Hydrogen supply system for leaks
and damage
■ Hydrogen tank (with valve) for leaks
and damage
■ Hydrogen tank band for looseness
and damage
Additional Maintenance Items for
Special Operating Conditions3
Driving on dirt roads or dusty roads: ■Inspect ball joints and dust covers
■Inspect drive shaft boots
■Inspect steering linkage and boots
■ Tighten nuts and bolts on chassis
and body
Driving while towing, using a car-top
carrier, or heavy vehicle loading:
4
■ Tighten nuts and bolts on chassis
and body
Dealer Service verification:
D
ate: Mileage:
Dealer Service verification:
D
ate: Mileage:
Maintenance Log
MAINTENANCE LOG
MAINTENANCE