recommended LEXUS RX450H 2019 Owner's Manual

6217-3. Do-it-yourself maintenance
7
Maintenance and care
RX450h_RX450hL_U
Tire valve
Tire pressure gauge
Remove the tire valve cap.
Press the tip of the tire pressure gauge onto the tire valve.
Read the pressure using the gauge gradations.
If the tire inflation pressure is not at the recommended level, adjust the pres-
sure.
If you add too much air, press the center of the valve to deflate.
After completing the tire inflation pressure measurement and adjustment,
apply soapy water to the valve and check for leakage.
Put the tire valve cap back on.
■Tire inflation pressure check interval
You should check tire inflation pressure ev ery two weeks, or at least once a month.
Do not forget to check the spare.
■Effects of incorrect tire inflation pressure
Driving with incorrect tire inflation pressure may result in the following:
●Reduced fuel economy
●Reduced driving comfort and poor handling
●Reduced tire life due to wear
●Reduced safety
●Damage to the drive train
If a tire needs frequent inflating, ha ve it checked by your Lexus dealer.
Inspection and adjustment procedure
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6247-3. Do-it-yourself maintenance
RX450h_RX450hL_U
WARNING
■When replacing wheels
●Do not use wheels that are a different size from those recommended in the Owner’s
Manual, as this may result in a loss of handling control.
●Never use an inner tube in a leaking wheel which is designed for a tubeless tire. Doing
so may result in an accident, causing death or serious injury.
■Use of defective wheels prohibited
Do not use cracked or deformed wheels.
Doing so could cause the tire to leak air du ring driving, possibly causing an accident.
NOTICE
■Replacing tire pressure warning valves and transmitters
●Because tire repair or replacement may affe ct the tire pressure warning valves and
transmitters, make sure to have tires serviced by your Lexus dealer or other qualified
service shop. In addition, ma ke sure to purchase your tire pressure warning valves
and transmitters at your Lexus dealer.
●Ensure that only genuine Lexus wheels are used on your vehicle.
Tire pressure warning valves and transmitte rs may not work properly with non-genu-
ine wheels.
■Selectable Color Trim (if equipped)
●If rattles, noise, or ot her problems occur while
Selectable Color Trim are installed, contact
your Lexus dealer.
●Do not remove or install Selectable Color
Trim yourself, as it may be damaged. Have the
Selectable Color Trim removed and installed
by your Lexus dealer.

6317-3. Do-it-yourself maintenance
7
Maintenance and care
RX450h_RX450hL_U
■Use a CR2032 lithium battery
●Batteries can be purchased at your Lexus dealer, loca l electrical appliance shops or
camera stores.
●Replace only with the same or equivalent type recommended by the manufacturer.
●Dispose of used batteries according to the local laws.
■If the electronic key battery is depleted
The following symptoms may occur:
●The smart access system with push-button start and wireless remote control will not
function properly.
●The operational rang e will be reduced.
WARNING
■Removed battery and other parts
These parts are small and if swallowed by a child, they can cause choking. Keep away
from children. Failure to do so coul d result in death or serious injury.
NOTICE
■For normal operation after replacing the battery
Observe the following precautions to prevent accidents:
●Always work with dry hands.
Moisture may cause the battery to rust.
●Do not touch or move any other co mponent inside the remote control.
●Do not bend either of the battery terminals.

6778-2. Steps to take in an emergency
8
When trouble arises
RX450h_RX450hL_U
When replacing tires on a vehicle with wheel lock nuts, use the following proce-
dures to remove and install the wheel lock nuts. The wheel lock key is stored in
the tray inside the luggage compartment. Always return the wheel lock key to its
original position after use, so that it does not get lost.
■Removal
For ease of removal, the wheel lock nut should always be the first one loos-
ened.
Place the wheel lock key on top of th e wheel lock nut, turning until the
wheel lock key and wheel lock nut patterns engage.
Place the wheel nut wrench on the wheel lock key, and while applying pres-
sure on the wheel lock key, loosen the wheel lock nut.
■Installation
For ease of installation, the wheel lock nut should always be the last one tight-
ened.
By hand, install a wheel lock nut on each wheel.
Place the wheel lock key on top of th e wheel lock nut, turning until the
wheel lock key and wheel lock nut patterns engage.
Place the wheel nut wrench on the wheel lock key, and while applying pres-
sure on the wheel lock key, tighten the wheel lock nut to the recommended
torque.
Wheel lock nut (if equipped)
NOTICE
Do not use an impact wrench. Using an impact wrench may cause permanent damage
to wheel lock nut and wheel lock key. If in doubt about wheel lock application, contact
your Lexus dealer.
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6948-2. Steps to take in an emergency
RX450h_RX450hL_U
■Stopping the hybrid system
Shift the shift lever to P, set the parking brake, and press the power switch as you normally
do when stopping the hybrid system.
■Replacing the key battery
As the above procedure is a temporary measure, it is recommended that the electronic
key battery be replaced immediately when the battery is depleted. (P. 630)
■Changing power switch modes
Release the brake pedal and press the power switch in step above.
The hybrid system does not start and modes will be changed each time the switch is
pressed. ( P. 240)
■When the electronic key does not work properly
●Make sure that the smart access system wi th push-button start has not been deacti-
vated in the customization setting. If it is off, turn the function on.
(Customizable features P. 740)
●Check if battery-saving mode is set. If it is set, cancel the function. (P. 160)
WARNING
■When using the mechanical key and operating the power windows or the moon roof
or panoramic moon roof
Operate the power window or the moon roof or panoramic moon roof after checking
to make sure that there is no possibility of any passenger having any of their body parts
caught in the window or the moon roof or panoramic moon roof.
Also, do not allow children to op erate the mechanical key. It is possible for children and
other passengers to get caught in the powe r window or the moon roof or panoramic
moon roof.
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7149-1. Specifications
RX450h_RX450hL_U
■Engine oil selection
“Toyota Genuine Motor Oil” is used in your Lexus vehicle. Use Lexus
approved “Toyota Genuine Motor Oil” or equivalent to satisfy the following
grade and viscosity.
Oil grade: ILSAC GF-5 multigrade engine oil
Recommended viscosity: SAE 0W-20
SAE 0W-20 is the best choice for
good fuel economy and good start-
ing in cold weather.
If SAE 0W-20 is not available, SAE
5W-20 oil may be used. However, it
must be replaced with SAE 0W-20
at the next oil change.
Oil viscosity (0W-20 is explained here as an example):
• The 0W in 0W-20 indicates the characteristic of the oil which allows cold startability. Oils with a lower value be fore the W allow for easier starting of
the engine in cold weather.
• The 20 in 0W-20 indicates the viscos ity characteristic of the oil when the
oil is at high temperature. An oil with a higher viscosity (one with a higher
value) may be better suited if the vehicle is operated at high speeds, or
under extreme lo ad conditions.
How to read oil container label:
The International Lubricant Specifi-
cation Advisory Committee
(ILSAC) Certification Mark is added
to some oil containers to help you
select the oil you should use.
Outside temperature

7179-1. Specifications
9
Vehicle specifications
RX450h_RX450hL_U
Type A
Steering
Free playLess than 1.2 in. (30 mm)
Tires and wheels
Tire size235/65R18 106V, T165/90D18 107M (spare)
Tire inflation pressure
(Recommended cold tire
inflation pressure)
Front tire33 psi (230 kPa, 2.3 kgf/cm2 or bar)
Rear tire
33 psi (230 kPa, 2.3 kgf/cm2 or bar)Spare tire
60 psi (420 kPa, 4.2 kgf/cm2 or bar)
Driving at high speeds (above 100 mph [160 km/h])
(in countries where such speeds are permitted by
law)
Add 5 psi (30 kPa, 0.3 kgf/cm2 or bar) to the
front and rear tires. Never exceed the maximum
cold tire inflation pressu re indicated on the tire
sidewall.
Wheel size18  8 J, 18  4 T (spare)
Wheel nut torque76 ft•lbf (103 N•m, 10.5 kgf•m)

7189-1. Specifications
RX450h_RX450hL_U
Type B
Tire size235/55R20 102V, T165/90D18 107M (spare)
Tire inflation pressure
(Recommended cold tire
inflation pressure)
RX450h:
Front tire
33 psi (230 kPa, 2.3 kgf/cm2 or bar)Rear tire
33 psi (230 kPa, 2.3 kgf/cm2 or bar)
Spare tire60 psi (420 kPa, 4.2 kgf/cm2 or bar)
Driving at high speeds (above 100 mph [160 km/h])
(in countries where such speeds are permitted by
law)
Add 11 psi (70 kPa, 0.7 kgf/cm2 or bar) to the
front and rear tires. Never exceed the maximum
cold tire inflation pressu re indicated on the tire
sidewall.
RX450hL:
Front tire
35 psi (240 kPa, 2.4 kgf/cm2 or bar)
Rear tire35 psi (240 kPa, 2.4 kgf/cm2 or bar)
Spare tire
60 psi (420 kPa, 4.2 kgf/cm2 or bar)Driving at high speeds (above 100 mph [160 km/h])
(in countries where such speeds are permitted by
law)
Add 9 psi (62 kPa, 0.6 kgf/cm2 or bar) to the
front and rear tires. Never exceed the maximum
cold tire inflation pressu re indicated on the tire
sidewall.
Wheel size20  8 J, 18  4 T (spare)
Wheel nut torque76 ft•lbf (103 N•m, 10.5 kgf•m)

7309-1. Specifications
RX450h_RX450hL_U
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 no t been driven more than 1
mile or 1.5 km un der that condition
Maximum inflation pres-
sureThe maximum cold inflated pr essure to which a tire may
be inflated, shown on the sidewall of the tire
Recommended inflation
pressureCold tire inflation pressure recommended by a manu-
facturer
Accessory weight
The combined weight (in exce ss of those standard items
which may be replaced) of hybrid transmission, power
steering, power brakes, power windows, power seats,
radio and heater, to the extent that these items are avail-
able as factory-installed eq uipment (whether installed
or not)
Curb weight
The weight of a motor vehicle with standard equipment,
including the maximum capacity of fuel, oil and coolant,
and if so equipped, air co nditioning 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 weight150 lb. (68 kg) times the numb er of occupants specified
in the second column of Table 1* that follows
Occupant distributionDistribution of occupants in a vehicle as specified in the
third column of Table 1
* below

792
RX450h_RX450hL_UGAS STATION INFORMATION
Auxiliary catch leverFuel filler door
P. 595 P. 276
Hood lock release leverFuel filler door openerTire inflation pressure
P. 595 P. 276 P. 717
Fuel tank capacity
(Reference)17.2 gal. (65 L, 14.3 Imp. gal.)
Fuel type
Unleaded gasoline only P. 712
Cold tire inflation
pressure P. 717
Engine oil capacity
(Drain and refill —
reference)P. 713
Engine oil type“Toyota Genuine Motor
Oil” or equivalent
Oil grade: ILSAC GF-5 multigrade engine oil
Recommended viscosity: SAE 0W-20 P. 714