coolant level TOYOTA MIRAI 2021 Warranties & Maintenance Guides (in English)

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

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

31
_ Inverter coolant level
_ Steering gear
_ Steering linkage and boots
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.
Dealer Service verification:
D
ate: Mileage:
45,000 miles or 54 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:
_ Ball joints and dust covers
_ Brake lines and hoses
_ Drive 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
Maintenance Log
MAINTENANCE LOG
MAINTENANCE

33
Dealer Service verification:
D
ate: Mileage:
60,000 miles or 72 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 breather pipe tip part (Gore film)
■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
■Replace hybrid transaxle fluid
■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.
_
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

35
Dealer Service verification:
D
ate: Mileage:
75,000 miles or 90 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:
_ Ball joints and dust covers
_ Brake lines and hoses
_ Drive 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 _ Inverter coolant level
_ Steering gear
_ Steering linkage and boots
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.
Maintenance Log
MAINTENANCE LOG
MAINTENANCE

37
Dealer Service verification:
D
ate: Mileage:
90,000 miles or 108 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
4
_ 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 Perform 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.
_
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

39
Dealer Service verification:
D
ate: Mileage:
105,000 miles or 126 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:
_ Ball joints and dust covers
_ Brake lines and hoses
_ Drive 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 _ Inverter coolant level
_ Steering gear
_ Steering linkage and boots
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 Perform 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.
Maintenance Log
MAINTENANCE LOG
MAINTENANCE

41
Dealer Service verification:
D
ate: Mileage:
120,000 miles or 144 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 breather pipe tip part (Gore film)
■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
■Replace hybrid transaxle fluid
■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 Perform 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.6 Replace tank (with valve) every 15 years or 180 months whichever comes first.7 Replace inverter coolant at 150,000 miles and every 50,000 miles thereafter.
_
H ydrogen supply system for leaks
and damag
e
_ H ydrogen tank (with valve) for leaks
and damage6
_ H ydrogen tank band for looseness
and damage
_ I

nverter coolant level
7
_ S teering gear
_S

teering linkage and boots
Maintenance Log
MAINTENANCE LOG
MAINTENANCE

43
Fuel Cell Air Filter
Inspect or replace at specified intervals.
When performing inspections, check for
dama
ge, excessive wear and oiliness,
and replace if necessary.
Fuel Cell Coolant
Inspect at specified intervals. When performing
inspections, check that the coolant level is
between the “FULL” and “LOW” lines on the
see-through reservoir tank.
Notice: A qualified technician should perform
this operation.
Use the following product:
“Toyota Genuine FC Stack Coolant.”
• In order to safely cool the fuel cell
stack, which is at high voltages, the
fuel cell stack coolant is an exclusive
high insulation product.
• Never use water or other kinds of coolant s
as they will cause damage.
• Coolant changes are unnecessary .
• Do not reuse coolant that has been removed
from the radiator.
• Coolant is colorless.
• Consult your Toyota dealer about
replenishing the fuel cell stack coolant.
Fuel Cell HV Battery
Cooling Intake Filter
Inspect and clean at specified intervals.
Refer to “Cleaning the traction battery air
intake vents and filters”
in the “Maintenance
and Care” section of the Owner’s Manual
for cleaning procedures.
Hybrid Transaxle Fluid
Inspect level and replace at specified intervals.
When performing inspections, check each
component for signs of leakage. If you
discover any leakage, have it repaired by a
qualified technician immediately.
Hydrogen Sensors
Inspect both hydrogen sensors at specified
intervals. This inspection should be performed
using calibration gas at a concentration of
1.3% hydrogen.
Notice: A qualified technician should perform
this operation.
Hydrogen Tank (with Valve)
NOTE: Replace every 15 years or
180 months, whichever comes first.
Notice: A qualified technician should
perform this opera
tion.

EXPLANATION OF MAINTENANCE ITEMS
Maintenance Log
MAINTENANCE

44
EXPLANATION OF MAINTENANCE ITEMS
Inverter Coolant
Drain the cooling system and refill with an
ethylene-glycol type coolant. Inspect hoses
and connections for corrosion and leaks.
Tighten connections and replace parts
when necessary.
Inspect at specified inter

vals. When performing
inspections, check that the coolant level is
between the “FULL” and “LOW” lines on the
see-through reservoir tank.
Notice: A qualified technician should perform
this operation.
Use the following product:
“Genuine Toyota Super Long-Life Coolant.”
NOTE: Replace inverter coolant at 150,000
miles and every 50,000 miles thereafter.
Ion Exchanger Element
It is necessary to replace the element within
the Ion Exchanger assembly periodically in
order to prevent degradation of the electrical
generating efficiency of the FC stack.
Notice: A qualified technician should perform
this operation.
Nuts and Bolts on Chassis
and Body
Retighten the seat-mounting bolts and
front/rear suspension member retaining
bolts to specified torque.
Radiator, Condenser, Hoses
and/or Intercooler
Inspect for damage, debris, corrosion,
kinks, cracks, rot, clogging and leaks.
Have any problem repaired immediately
by a qualified technician.
Steering Gear
Inspect for signs of leakage. If you
discover any leakage, have it repaired
immedia
tely by a qualified technician.
Steering Linkage and Boots
With the vehicle stopped, check for
excessive freeplay in the steering wheel.
Inspect
the linkage for bending and
damage and the dust boots for
deterioration, cracks and damage.
Replace any damaged parts. A qualified
technician should
perform these operations.
Tire Rotation
Tires should be rotated according to the
instructions in the Owner’s Manual. When
rotating tires, check for damage and
uneven wear.
Replace if necessary.
Wiper Blades
The wiper blades should not show
any signs of cracking, splitting, wear ,
contamina
tion or deformation. The
wiper blades should clear the windshield
without streaking or skipping.
Maintenance Log
MAINTENANCE