2023 TOYOTA MIRAI fuel cap

4888-2. Steps to take in an emergency
Owners Manual_USA_M62064_en
■When replacing the 12-volt bat-
tery
●Use a Central Degassing type 12-
volt battery (European Regula-
tions).
●Use a 12-volt battery with the
same case size as the previous
12-volt battery and an equivalent
20 hour rate capacity (20HR) or
greater.
• If the sizes differ, the 12-volt bat- tery cannot be properly secured.
• If the 20 hour rate capacity is low,
even if the time period where the
vehicle is not used is a short time,
the 12-volt battery may discharge
and the fuel cell system may not
be able to start.
●Use a 12-volt battery with a han-
dle. If a 12-volt b attery without a
handle is used, removal is more
difficult.
●After replacing, firmly attach the
following items to the exhaust hole
of the 12-volt battery.
• Use the exhaust hose that was
attached to the 12-volt battery
before replacing an d confirm that
it is firmly connected to the hole
section of t he vehicle.
• Use the exhaust hole plug included with the 12-volt battery
replaced or the one installed on
the 12-volt battery prior to the
replacement. (Depending on the
12-volt battery to be replaced, the
exhaust hole may be plugged.)
Exhaust hole plug
Exhaust hole
Exhaust hose For details, consult your Toyota
dealer.
WARNING
■When removing the 12-volt
battery terminals
Always remove the negative (-)
terminal first. If the positive (+) ter-
minal contacts any metal in the
surrounding area when the posi-
tive (+) terminal is removed, a
spark may occur, leading to a fire
in addition to ele ctrical shocks
and death or serious injury.
■Avoiding 12-volt battery fires
or explosions
Observe the following precautions
to prevent accidentally igniting the
flammable gas that may be emit-
ted from the 12-volt battery:
●Make sure each jumper cable is
connected to the correct termi-
nal and that it is not unintention-
ally in contact with any other
than the intended terminal.
●Do not allow the other end of
the jumper cable connected to
the “+” terminal to come into
contact with any other parts or
metal surfaces in the area, such
as brackets or unpainted metal.
●Do not allow the + and - clamps
of the jumper cables to come
into contact with each other.
●Do not smoke, use matches,
cigarette lighter s or allow open
flame near the 1 2-volt battery.
■12-volt battery precautions
The 12-volt battery contains poi-
sonous and corrosive acidic elec-
trolyte, while related parts contain
lead and lead compounds.
Observe the following precautions
when handling the 12-volt battery:

4938-2. Steps to take in an emergency
Owners Manual_USA_M62064_en
8
When trouble arises
able.
6 Start the fuel cell system and
turn the air conditioning sys-
tem on to check that the radi-
ator cooling fan operate and
to check for coolant leaks
from the radiator or hoses.
The fan operate when the air condi-
tioning system is turned on immedi-
ately after a cold s tart. Confirm that
the fan is operating by checking the
fan sound and air flow. If it is diffi-
cult to check these, turn the air con-
ditioning system on and off
repeatedly.
(The fan may not o perate in freez-
ing temperatures.)
7 If the fan is not operating:
Stop the fuel cell system
immediately and contact your
Toyota dealer.
If the fan is operating:
Have the vehicle inspected at
the nearest Toyota dealer.
WARNING
■When inspecting under the
hood of your vehicle
Observe the following precau-
tions.
Failure to do so may result in seri-
ous injury such as burns.
●If steam is seen coming from
under the hood, do not open the
hood until the steam has sub-
sided. The fuel cell unit com-
partment may be very hot.
●Even if fuel cell system has
stopped, the cooling fan may
begin to move suddenly.
Do not touch or approach the
rotating parts of the fan. Doing
so may lead to fingers, clothes
or tools getting caught, resulting
in injury.
●Do not loosen the coolant reser-
voir caps or radia tor cap, while
the fuel cell system and radiator
are hot.
High temperature steam or
coolant could spray out.
NOTICE
■When inverter coolant
Add coolant slowly after the fuel
cell system has cooled down suffi-
ciently. Adding inverter cool cool-
ant to a hot fuel cell system too
quickly can cause damage to the
fuel cell system.
■To prevent damage to the
cooling system
Observe the following precau-
tions:
●Avoid contaminating the coolant
with foreign matter (such as
sand or dust etc.).
●Do not use any coolant additive
with inverter coolant.
●For replacement of the fuel cell
stack coolant, contact your Toy-
ota dealer.
●Do not use water or any other
coolant when refilling the fuel
cell stack coolant. Also, do not
use any additive agents for the
coolant.

4969-1. Specifications
Owners Manual_USA_M62064_en
9-1.Specifications
*1: Unladen vehicles
*2: Vehicles without electronic sunshade
*3: Vehicles with electronic sunshade
■Vehicle identification num-
ber
The vehicle identification num-
ber (VIN) is the legal identifier
for your vehicle. This is the pri-
mary identification number for
your Toyota. It is used in regis-
tering the ownership of your
vehicle.
This number is stamped on the
top left of the instrument panel. This number is also stamped
under the right-hand front seat.
Maintenance data (fuel,
fluid level, etc.)
Dimensions and weight
Overall length195.9 in. (4975 mm)
Overall width74.2 in. (1885 mm)
Overall height*157.9 in. (1470 mm)*2
58.3 in. (1480 mm)*3
Wheelbase115.0 in. (2920 mm)
Tread*1Front63.4 in. (1610 mm)
Rear63.2 in. (1605 mm)
Vehicle capacity weight
(Occupants + luggage)835 lb. (380 kg)
Seating capacity
Seating capacity5 (Front 2, Rear 3)
Vehicle identification

4979-1. Specifications
Owners Manual_USA_M62064_en
9
Vehicle specifications
This number is also on the Certi- fication Label.
*1: H2 quality standard:
EN 17124 (European stan dard for EU27 countries)
ISO 14687 Grade D (European standard)
SAE J2719 (US standard)
*2: This is the maximum possible f ill amount. The actual fuel amount
achieved at hydrogen st ations may be different due to station capacity or
station settings.
*3: For models of JPD20L-CEDSSA*5 and JPD20L-CEDHSA*5
*4
: For models of JPD20L-CEDBSA*5
*5
: The model code is indicated on the manufacturer’s plate or label.
(  P.496)
Fuel
Fuel typeCompressed hydrogen gas*1
Nominal working pressure10150 psi (70 MPa, 714 kgf/cm2, 700
bar)
Hydrogen tanks’ fuel capacity (Refer-
ence)
 37.5 gal. (142.2 L, 31.2 Imp.gal.)
(Approximately 12.6 lb. [5.7
kg.]
*2)*3
30.8 gal. (116.9 L, 25.7 Imp.gal.)
(Approximately 10.4 lb. [4.7
kg.]
*2)*4

4989-1. Specifications
Owners Manual_USA_M62064_en
Electric motor (traction motor)
Ty p ePermanent magnet synchronous
motor
Maximum output134 kW
Maximum torque221.3 ft•lbf (300 N•m, 30.6 kgf•m)
Traction battery
Ty p eLithium-ion battery
Voltage3.7 V/cell
Capacity4.0 Ah
Quantity84 cells
Nominal voltage310.8 V
Cooling system
Capacity*
Fuel cell
stack17.3 qt. (16.4 L, 14.4 Imp. qt.)
Inverter4.2 qt. (4.0 L, 3.5 Imp. qt.)

4999-1. Specifications
Owners Manual_USA_M62064_en
9
Vehicle specifications
*: The fluid capacity is a reference quantity. If replacement is necessary, contact your Toyota dealer.
Coolant
type
Fuel cell
stack
“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 coolants 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 deale r about replenishing
or changing the fuel cell stack coolant.
Inverter
Use either of the following:
 “Toyota Super Long Life Coolant”
 Similar high-quality ethylene glycol-based non-
silicate, non-amine, non- nitrite, and non-borate
coolant with long-life hybrid org anic acid tech-
nology
Do not use plain water alone.
NOTICE
■Fuel cell stack coolant
The fuel cell stack coolant is e xclusive for fuel cell stack usage. Damage
may occur when water or any other type of coolant is used, so n ever use
any other fluid.
If the fuel cell stack coolant is low, immediately contact your Toyota dealer.

5009-1. Specifications
Owners Manual_USA_M62064_en
*: The fluid capacity is a reference quantity.If replacement is necessary, contact your Toyota dealer.
*1: Minimum pedal clearance when depressed with a force of 112 lbf (500 N, 51 kgf) while the fuel cell system is operating.
When performing the brake pedal i nspection, also be sure to check that
Electrical system (12-volt battery)
Open voltage at 68°F (20°C):
12.0 V or higher
(Turn the power switch off and turn on the
high beam headlights for 30 seconds.)
Charging rates
Quick charge
Slow charge
15 A max.
5 A max.
Transmission
Fluid capacity*5.9 qt. (5.6 L , 4.9 Imp. qt.)
Fluid typeToyota Genuine ATF WS
NOTICE
■Transmission fluid type
Using transmission fluid other than the above type may cause ab normal
noise or vibration, or damage th e transmission of your vehicle.
Brakes
Pedal clearance*14.0 in. (102 mm) Min.
Pedal free play0.04  0.24 in. (1  6 mm)
Brake pad wear limit0.04 in. (1 mm)
Parking brake lin ing wear limit0.04 in. (1 mm)
Parking brake indicator*2
When pulling the parking brake switch for
1 to 2 seconds: comes on
When pushing the parking brake switch for
1 to 2 seconds: turns off
Fluid typeFMVSS No.116 DOT 3 or SAE J1703
FMVSS No.116 DOT 4 or SAE J1704

5069-1. Specifications
Owners Manual_USA_M62064_enWarning: The temperature grades
of a tire assume that it is properly
inflated and not overloaded.
Excessive speed, underinflation, or
excessive loading, either sepa-
rately or in combination, can cause
heat buildup and possible tire fail-
ure.
Glossary of tire terminology
Tire related termMeaning
Cold tire inflation pressure
Tire pressure when the vehicle has been
parked for three hours or more, or has not
been driven more than
1 mile or 1.5 km
under that condition
Maximum inflation pressure
The maximum cold inf lated pressure to
which a tire may be inflated, shown on the
sidewall of the tire
Recommended inflation pres-
sureCold tire inflation pressure recommended
by a manufacturer
Accessory weight
The combined weight (in excess of those
standard items which may be replaced) of
transmission, power steering, power
brakes, power windows, power seats,
radio and heater, to the extent that these
items are available as factory-installed
equipment (whether installed or not)
Curb weight
The weight of a moto r vehicle with stan-
dard equipment, including the maximum
capacity of fuel, oil and coolant, and if so
equipped, air conditioning and additional
weight optional engine
Maximum loaded vehicle
weight
The sum of:
(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity weight
(d) Production options weight
Normal occupant weight
150 lb. (68 kg) times the number of occu-
pants specified in the second column of
Ta b l e 1
* that follows