2022 LEXUS RX450h coolant capacity

4568-1. Specifications
*: The coolant capacity is a reference quantity.
If replacement is necessary, contact your Lexus dealer.
Cooling system
Capacity*
Gasoline
engine
RX450h (Vehicles without towing package)
10.3 qt. (9.8 L, 8.6 Imp. qt.)
RX450h (Vehicles with towing package)
10.7 qt. (10.1 L, 8.9 Imp. qt.)
RX450hL
13.2 qt. (12.5 L, 11 Imp. qt.)
Power con-
trol unit2.0 qt. (1.9 L, 1.7 Imp. qt.)
Coolant type
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 orga nic acid technology
Do not use plain water alone.
Ignition system (spark plug)
MakeDENSO FK20HBR8
Gap0.03 in. (0.8 mm)
NOTICE
■Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust the spark plug gap.

4678-1. Specifications
8
Vehicle specifications
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 pressureThe maximum cold inflated pressure to which a tire
may be inflated, shown on the sidewall of the tire
Recommended inflation pressureCold tire inflation pressure recommended by a
manufacturer
Accessory weight
The combined weight (in excess of those standard
items which may be replaced) of hybrid transmis-
sion, power steering, power brakes, power win-
dows, 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 motor vehicle with standard equip-
ment, 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 occupants
specified in the second column of Table 1
* that fol-
lows
Occupant distributionDistribution of occupants in a vehicle as specified in
the third column of Table 1
* below
Production options weight
The combined weight of installed regular produc-
tion options weighing over 5 lb. (2.3 kg) in excess of
the standard items which they replace, not previ-
ously considered in curb weight or accessory
weight, including heavy duty brakes, ride levelers,
roof rack, heavy duty 12-v olt battery, and special
trim

508Alphabetical Index
If the fuel filler door cannot be opened.........................................................................438
If the hybrid system will not start ........ 436
If the vehicle is submerged or water on the road is rising......................................403
If you have a flat tire .................................. 424
If you lose your keys.................................438
If you think something is wrong .........409
If your vehicle becomes stuck............. 449
If your vehicle has to be stopped in an
emergency ................................................ 402
If your vehicle needs to be towed .....405
If your vehicle overheats ........................ 446
Energy monitor .....................................99, 100
Engine ACCESSORY mode .............................. 185
Compartment .............................................365
Engine switch.................................................182
Hood................................................................ 363
How to start the hybrid system ............182
Identification number ............................... 453
If the hybrid system will not start ........ 436
If your vehicle has to be stopped in an
emergency ................................................ 402
Ignition switch (power switch) ..............182
Overheating................................................. 446
Power switch .................................................182
Tachometer ..................................................... 83
Engine coolant Capacity .........................................................456
Checking ....................................................... 367
Preparing and checking before winter.........................................................................286
Engine coolant temperature gauge ....... 83
Engine oil Capacity .........................................................455
Checking .......................................................365
Preparing and checking before winter.........................................................................286
Warning light ...................................................411
Engine oil maintenance data .................. 367 Engine switch (power switch) ..................182
If your vehicle has to be stopped in an emergency .................................................402
EPS (Electric Power Steering) .............. 279 Warning light .................................................413
EV drive mode................................................187
EV indicator .......................................................67
Event data recorder (EDR) ........................... 8
F
Flat tire Tire pressure warning system ............. 376
Vehicles with a spare tire....................... 424
Floor mats .......................................................... 24
Fluid Brake ................................................................ 457
Hybrid transmission.................................. 457
Washer .......................................................... 369
Fog lights Switch...............................................................204
Footwell light ...................................................315
Front automatic air conditioning system .......................................................................... 298
Front fog lights Replacing light bulbs................................393
Front passenger footwell hooks ............ 340
Front passenger occupant classification system .............................................................. 39
Front seats Adjustment ......................................................129
Cleaning .........................................................353
Correct driving posture ............................ 25
Driving position memory ........................ 140
Head restraints..............................................143
Memory recall function.............................. 141
Power easy access system .................... 140
Seat heaters ....................................................312
Seat position memory .............................. 140
Seat ventilators ..............................................312
Front side marker light Light switch .................................................... 198
Replacing light bulbs................................393

512Alphabetical Index
Energy monitor............................................ 100
G-force................................................................ 91
LTA (Lane Tracing Assist).................... 230
Menu icons ...................................................... 89
Meter control switches .............................. 89
Navigation system-linked display ........ 92
Pop-up display...............................................88
Settings .............................................................. 92
Suggestion function..................................... 93
Tire pressure ................................................ 376
Units ...................................................................... 91
Warning message..................................... 420
N
Navigation system-linked display....92, 98
Noise from under vehicle ...............................6
O
“ODO TRIP” switch ...................................... 87
Odometer ......................................................... 87
Odometer and trip meter displayDisplay items ................................................... 87
“ODO TRIP” switch .................................... 87
Pop-up display............................................... 87
Oil Engine oil .......................................................455
Rear differential oil .................................... 457
Opener Fuel filler door..............................................209
Hood................................................................ 363
Outer foot lights Location............................................................315
Outside door handle lights........................315
Outside rear view mirrors Adjustment..................................................... 148
BSM (Blind Sport Monitor) ................. 246
Folding ..............................................................149
Linked mirror function when reversing.......................................................................... 148
Mirror position memory.......................... 140
Outside rear view mirror defoggers300 RCTA function ............................................259
Outside temperature..... ............................... 83
Overheating .................................................. 446
P
Paddle shift switches ........................... 190, 191
Panic mode ......................................................107
Panoramic moon roof Jam protection function ............................157
Operation ....................................................... 156
Parking assist sensors (intuitive parking assist) ............................................................. 252
Parking brake Operation ....................................................... 193
Parking brake engaged warning buzzer........................................................................... 195
Warning light ................................................ 416
Warning message ...................................... 195
Parking lights Light switch .................................................... 198
Replacing light bulbs................................393
Parking Support Brake function (for rear-crossing vehicles) ...........................274 Function .......................................................... 274
Parking Support Brake function (static objects) ........................................................... 271 Function ............................................................ 271
PCS (Pre-Collision System) Function ........................................................... 218
PCS OFF switch ........................................220
Warning light ................................................ 416
Personal lights.................................................315
PKSA (Parking Support Alert) .............. 250
PKSB (Parking Support Brake)............. 265 Warning message ..................................... 270
Power back door ............................................ 113 Hands Free Power Back Door ............. 116
Smart access system with push-button start ................................................................... 114
Power control unit.......................................... 69
Power control unit coolant Capacity ........................................................ 456

516Alphabetical Index
Installing tire pressure warning valves and transmitters .......................................377
Registering ID codes ............................... 379
Warning light ................................................. 414
Tires Chains ............................................................. 287
Checking ....................................................... 374
If you have a flat tire .................................. 424
Inflation pressure....................................... 380
Information .................................................... 463
Replacing ....................................................... 424
Rotating tires ................................................ 376
Size....................................................................458
Snow tires ......................................................286
Spare tire........................................................ 424
Tire inflation pressure display function......................................................................... 376
Tire pressure warning system ............. 376
Warning light ................................................. 414
Tools.................................................................. 425
Top tether strap................................................57
Total load capacity ...................................... 452
Towing Dinghy towing ................................................ 181
Emergency towing ...................................405
Towing eyelet .............................................. 407
Trailer towing ...................................................171
TRAC (Traction Control) ........................ 279
Traction battery (hybrid battery) Hybrid battery (traction battery) air vents.............................................................................. 71
Location............................................................. 69
Specification ................................................. 454
Warning message......................................... 72
Traction Control (TRAC) ........................ 279
Traction motor (electric motor) ............... 66
Trailer Sway Control.................................. 279
Trailer towing ................................................... 171
Transmission Driving mode select switch .................. 276
Hybrid transmission .................................. 189
M mode ............................................................. 191 Paddle shift switches ........................ 190, 191
Trip meters ........................................................ 87
Turn signal lights Replacing light bulbs................................393
Turn signal lever ...........................................192
Wattage ......................................................... 460
U
USB charging ports.................................... 329
V
Vanity lights.................................................... 340Wattage ......................................................... 460
Vanity mirrors ............................................... 340
VDIM (Vehicle Dynamics Integrated Man- agement)...................................................... 279
Vehicle data recording ....................................7
Vehicle Dynamics Integrated Manage- ment (VDIM).............................................. 279
Vehicle identification number ................ 452
Vehicle Stability Control (VSC) ........... 278
Ventilators (seat ventilators).....................312
VSC (Vehicle Stability Control) ........... 278
W
Warning buzzers
Approach warning.................................... 242
Brake Override System ...........................412
Door lock .......................................................... 110
Downshifting ................................................... 191
Drive-Start Control.....................................412
Electric power steering.............................413
Hands off steering wheel warning (LTA).......................................................................... 232
High coolant temperature...................... 410
Hybrid system overheat ............................ 411
Intuitive parking assist ................... 258, 415
Low engine oil pressure ............................ 411
LTA (Lane Tracing Assist)225, 228, 414
Open door ....................................................... 112

517Alphabetical Index
Open window ............................................... 152
PKSA (Parking Support Alert) ...........250
PKSB (Parking Support Brake) ...........415
Pre-collision braking.................................. 219
RCTA (Rear Cross Traffic Alert) ........415
Seat belt ................................................. 413, 414
Warning label .................................................. 69
Warning lights................................................ 410 ABS .................................................................... 412
Brake hold operated indicator ............. 417
Brake Override System ........................... 412
Brake system ................................................ 410
Charging system ...........................................411
Drive-Start Control .................................... 412
Electric power steering ............................413
High coolant temperature ..................... 410
Hybrid system overheat warning light411
Intuitive parking assist OFF indicator 415
Low engine oil pressure.............................411
Low fuel level .................................................413
LTA indicator ................................................. 414
Malfunction indicator lamp.......................411
Master warning light .................................. 417
Parking brake indicator ............................416
PKSB OFF indicator ..................................415
Pre-collision system ...................................416
RCTA OFF indicator.................................415
Seat belt reminder light ................. 413, 414
Slip indicator ..................................................416
SRS...................................................................... 412
Tire pressure .................................................. 414
Warning messages ..................................... 420
Washer Adding ............................................................ 369
Preparing and checking before winter.........................................................................286
Switch .............................................................. 204
Washing and waxing..................................350
Weight Cargo capacity.................................. 167, 170
Load limits .......................................................170
Weight ............................................................ 452 Wheels ............................................................. 382
Size ................................................................... 458
Window lock switch .....................................153
Windows Power windows ............................................. 151
Rear window defogger.......................... 300
Washer ...........................................................204
Windshield wiper de-icer ........................ 305
Windshield wiper inserts ..........................385
Windshield wipers Position........................................................... 206
Rain-sensing windshield wipers .........204
Replacing a windshield wiper insert 385
Winter driving tips....................................... 286
Wireless charger ......................................... 330
Wireless remote control Battery-Saving Function...........................126
Locking/Unlocking ................................... 107
Replacing the battery .............................. 386
For information regarding the equipment listed below, refer to
the “NAVIGATION AND MULTI-
MEDIA SYSTEM OWNER’S
MANUAL”.
· Navigation system
· Audio/visual system
· Panoramic view monitor
· Lexus parking assist monitor