2019 LEXUS RX450H turn

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RX450h_RX450hL_U
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4-1. Before driving Driving the vehicle ......................212
Cargo and luggage .................. 220
Vehicle load limits ..................... 223
Trailer towing (vehicles with towing package)............ 224
Trailer towing (vehicles without towing
package)..................................... 237
Dinghy towing ............................. 238
4-2. Driving procedures Power (ignition) switch............ 239
EV drive mode ............................ 244
Hybrid transmission.................. 246
Turn signal lever ......................... 252
Parking brake .............................. 253
Brake Hold ................................... 256
4-3. Operating the lights and wipers
Headlight switch ........................ 258
Automatic High Beam............. 262
Fog light switch ........................... 266
Windshield wipers and washer ......................................... 267
Rear window wiper and washer ..........................................272 4-4. Refueling
Opening the fuel tank cap ......274
4-5. Using the driving support systems
Lexus Safety System+ .............. 279
PCS (Pre-Collision System) ......... 286
LKA (Lane-Keeping Assist).......... 297
Dynamic radar cruise control with full-speed
range ............................................ 306
BSM (Blind Spot Monitor).......319 • BSM function......................... 323
• RCTA function...................... 327
Intuitive parking assist.............. 332
Intelligent Clearance Sonar (ICS)............................................. 342
Lexus parking assist monitor........................................ 363
Driving mode select switch ........................................... 379
Driving assist systems .............. 382
4-6. Driving tips Hybrid vehicle driving tips .....388
Winter driving tips..................... 390
Utility vehicle precautions ..... 394
4Driving

TABLE OF CONTENTS6
RX450h_RX450hL_U
7-1. Maintenance and careCleaning and protecting the vehicle exterior ................580
Cleaning and protecting the vehicle interior.................. 584
7-2. Maintenance Maintenance requirements ............................ 587
General mainte nance..............589
Emission inspection and maintenance (I/M)
programs.................................... 592
7-3. Do-it-yourself maintenance
Do-it-yourself service precautions................................ 593
Hood ............................................... 595
Positioning a floor jack ............ 596
Engine compartment ............... 597
12-volt battery ............................. 605
Tires .................................................... 611
Tire inflation pressure .............. 620
Wheels ........................................... 623
Air conditioning filter ............... 625
Windshield wiper inserts ........ 628
Electronic key battery.............. 630
Checking and replacing fuses.............................................. 632
Headlight aim .............................. 635
Light bulbs .................................... 637 8-1. Essential information
Emergency flashers .................. 652
If your vehicle has to be stopped in
an emergency .......................... 653
8-2. Steps to take in an emergency
If your vehicle needs to be towed ........................................... 654
If you think something is wrong........................................... 659
If a warning light turns on or a warning buzzer
sounds ......................................... 660
If a warning message is displayed .................................... 667
If you have a flat tire .................. 673
If the hybrid system will not start ....................................... 690
If the electronic key does not operate properly ............. 692
If the 12-volt battery is discharged................................. 695
If your vehicle overheats......... 702
If the vehicle becomes stuck .........706
7Maintenance and care8When trouble arises

8
RX450h_RX450hL_UPlease note that this manual applies to all
models and explains all equipment, including
options. Therefore, you may find some expl anations for equipment not installed on your
vehicle.
All specifications provided in this manual are current at the time of printing. However,
because of the Lexus policy of continual pr oduct improvement, we reserve the right to
make changes at any time without notice.
Depending on specifications, th e vehicle shown in the illustrations may differ from your
vehicle in terms of color and equipment.
Approximately five hours after the hybrid system is turned off, you may hear sound com-
ing from under the vehicle for several minutes. This is the sound of a fuel evaporation
leakage check and, it does not indicate a malfunction.
A wide variety of non-genuine spare parts and accessories for Lexus vehicles are cur-
rently available in the market. You should kn ow that Toyota does not warrant these prod-
ucts and is not responsible fo r their performance, repair, or replacement, or for any
damage they may cause to, or adverse effect they may have on, your Lexus vehicle.
This vehicle should not be modified with non-genuine Lexus products. Modification with
non-genuine Lexus products could affect its performance, safety or durability, and may
even violate governmental regulations. In addition, damage or performance problems
resulting from the modification may not be covered under warranty.
For your information
Main Owner’s Manual
Noise from under vehicle after turning off the hybrid system
Accessories, spare parts and modification of your Lexus

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RX450h_RX450hL_U
WARNING:
Explains something that, if not obeyed, could cause death or serious injury
to people.
NOTICE:
Explains something that, if not obey ed, could cause damage to or a mal-
function in the vehicle or its equipment.
Indicates operating or working procedures. Follow the steps in
numerical order.
Indicates the action (pushing,
turning, etc.) used to operate
switches and other devices.
Indicates the outcome of an
operation (e.g. a lid opens).
Indicates the component or posi-
tion being explained.
Means “Do not”, “Do not do this”,
or “Do not let this happen”.
Reading this manual

17Pictorial index
RX450h_RX450hL_U
Windshield wipers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 267
Precautions against winter season . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 390
To prevent freezing (windshield wiper de-icer)
*. . . . . . . . . . . . . . . . . . . . . . . . P. 516
Precautions against car wash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 582
Fuel filler door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 274
Refueling method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 276
Fuel type/fuel tank capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 712
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 611
Tire size/inflation pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 717
Winter tires/tire chain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 39 0
Checking/rotation/tire pressure warning system . . . . . . . . . . . . . . . . . . . . . . . . P. 611
Coping with flat tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 673
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P. 595
Opening. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 595
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 713
Coping with overheat. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 702
Headlights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 258
Turn signal lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P. 2 52
Parking lights/daytime running lights. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 258
Front side marker lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 258
Fog lights. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 266
Cornering lights
*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P. 259
Stop/tail lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 258
License plate lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 258
Back-up lights
Shifting the shift lever to R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 246
Rear side marker lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 258
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Light bulbs of the exte rior lights for driving
(Replacing method: P. 637, Watts: P. 719)
*: If equipped
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19Pictorial index
RX450h_RX450hL_U
Multi-information display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 101
Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P. 101
Energy monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 124
When the warning messages are displayed . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 667
Parking brake switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 253
Applying/releasing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P. 253, 254
Precautions against winter season . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 391
Warning buzzer/message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P. 255, 667
Turn signal lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P. 2 52
Headlight switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 258
Headlights/side marker lights/parking lights/tail lights/
license plate lights/daytime running lig hts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 258
Fog lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 266
Windshield wiper and washer switch . . . . . . . . . . . . . . . . . . . . . . . . . P. 267, 272
Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 267, 272
Adding washer fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 60 4
Emergency flasher switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P. 652
Hood lock release lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P. 595
Tilt and telescopic steering control switch . . . . . . . . . . . . . . . . . . . . . . . . . . P. 189
Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 189
Driving position memory
*1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P. 181
Air conditioning system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P. 507
Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 507
Rear window defogger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 516
Audio system*2
Audio system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 400
Hands-free system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 461
*1: If equipped
*2: For vehicles with a navigation system, refer to “NAVIGATION SYSTEM OWNER’S
MANUAL”.
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28
RX450h_RX450hL_U1-1. For safe use
Use only floor mats designed specifica
lly for vehicles of the same model and
model year as your vehicle. Fix them securely in place onto the carpet.
Insert the retaining hooks (clips) into
the floor mat eyelets.
Turn the upper knob of each retain-
ing hook (clip) to secure the floor
mats in place.
*: Always align the marks.
The shape of the retaining hooks (clips) may differ from that shown in the illustration.
Before driving
Floor mat
1
*
2

521-1. For safe use
RX450h_RX450hL_U
WARNING
■Front passenger occupant classification system precautions
●Do not recline the front passenger seatback so far that it touches a rear seat. This may
cause the “AIR BAG OFF” indicator light to be illuminated, which indicates that the
SRS airbags for th e front passenger will no t activate in the event of a severe accident.
If the seatback touches the rear seat, return the seatback to a position where it does
not touch the rear seat. Keep the front passenger seatback as upright as possible
when the vehicle is moving. Reclining the seatback excessively may lessen the effec-
tiveness of the seat belt system.
●If an adult sits in the fron t passenger seat, the “AIR BAG ON” indicator light is illumi-
nated. If the “AIR BAG OFF” indicator is illuminated, ask the passenger to sit up
straight, well back in the seat, feet on the floor, and with the seat belt worn correctly. If
the “AIR BAG OFF” indicator still remain s illuminated, either ask the passenger to
move to the rear seat, or if that is not possible, move the front passenger seat fully
rearward.
●When it is unavoidable to in stall a forward-facing child re straint system on the front
passenger seat, install the ch ild restraint system on the front passenger seat in the
proper order. ( P. 57)
●Do not modify or remove the front seats.
●Do not kick the front passenger seat or subject it to severe impact. Otherwise, the
SRS warning light may come on to indica te a malfunction of the front passenger
occupant classification system. In this cas e, contact your Lexus dealer immediately.
●Child restraint systems installed on the rear se at should not contact the front seat-
backs.
●Do not use a seat accessory, such as a cushion and seat cover, that covers the seat
cushion surface.
●Do not modify or replace the upholstery of the front seat.
●Adjust the front passenger seat so that the head restraint does not touch the ceiling. If
the head restraint is left in contact with the ceiling, the system may not detect the front
passenger properly, leading to improper operation of the airbags.