2015 LEXUS RX450h run flat

7325-1. Essential information
If you think something is wrong If you notice any of the following symptoms, your vehicle probably needs
adjustment or repair. Contact your Lexus dealer as soon as possible.
■ Visible symptoms
● Fluid leaks under the vehicle.
(Water dripping from the air conditioning after use is normal.)
● Flat-looking tires or uneven tire wear
● Engine coolant temper ature gauge needle continually points
higher than normal.
■ Audible symptoms
● Changes in exhaust sound
● Excessive tire squeal when cornering
● Strange noises related to the suspension system
● Pinging or other noises related to the hybrid system
■ Operational symptoms
● Engine missing, stumbling or running rough
● Appreciable loss of power
● Vehicle pulls heavily to one side when braking.
● Vehicle pulls heavily to one side when driving on a level road.
● Loss of brake effectiveness, sp ongy feeling, pedal almost touches
the floor

5
When trouble arises
7735-2. Steps to take in an emergency
■
If you have a flat front tire on a road covered with snow or ice (vehicles with a
compact spare tire)
Install the compact spare tire on one of the rear wheels of the vehicle. Perform the
following steps and fit tire chains to the front tires:
Replace a rear tire with the compact spare tire.
Replace the flat front tire with the tire removed from the rear of the vehi-
cle.
Fit tire chains to the front tires.■
After completing the tire change
The tire pressure warning system must be reset. (  P. 6 7 1 )
CAUTION■
Using the tire jack
Improper use of the tire jack may cause the vehicle to suddenly fall off the jack,
leading to death or serious injury. ●
Do not use the tire jack for any purpose other than replacing tires or installing and
removing tire chains.●
Only use the tire jack that comes with this vehicle for replacing a flat tire.
Do not use it on other vehicles, and do no t use other tire jacks for replacing tires
on this vehicle.●
Always check that the tire jack is securely set to the jack point.●
Do not put any part of your body under the vehicle while it is supported by the
jack.●
Do not start or run the hybrid system while your vehicle is supported by the jack.●
Do not raise the vehicle while someone is inside.●
When raising the vehicle, do not put an object on or under the jack.
●
Do not raise the vehicle to a height greate r than that required to replace the tire.
●
Use a jack stand if it is necessary to get under the vehicle.
Take particular care when lowering the vehicle to ensure that no one working on or
near the vehicle may be injured. STEP 1
STEP 2
STEP 3

863Alphabetical index
Daytime running light system............ 219
Defogger*
Rear window........................................358
Side mirrors..........................................358
Dimensions ............................................. 798
Dinghy towing ........................................324
Display
Energy flow ............................................. 39
Multi-information display............... 206
Trip information .................................. 209
Warning message .............................743
Do-it-yourself maintenance............. 648
Door courtesy lights
Door courtesy lights ........................ 582
Wattage ................................................ 809
Door lock
Back door .................................................75
Side door ................................................... 72
Wireless remote control................... 69
Door pockets ......................................... 587
Doors
Back door .................................................75
Door lock ................................ 56, 69, 72
Door windows ........................................ 112
Power back door ..................................75
Side door ................................................... 72
Side mirrors............................................109
Driver's seat belt reminder light .....736
Driving
Break-in tips ........................................... 167
Correct posture ...................................130
Procedures .............................................166
Utility vehicle
precautions ........................................292
Winter driving tips ............................ 302 Driving position memory ...................... 93
Electric power steering ........................271
Electronic features control ...............206
Electronic key
If the electronic key does not
operate properly ............................. 781
Emergency flashers
Switch....................................................... 724
Emergency, in case of
If a warning buzzer sounds........... 733
If a warning light turns on............... 733
If a warning message is
displayed............................................. 743
If the back door opener is
inoperative ............................................ 79
If the electronic key does not
operate properly ............................. 781
If the hybrid system will
not start ................................................ 777
If the shift lever cannot be
shifted from P ................................... 779
If the vehicle has a discharged
12-volt battery...................................784
If you have a flat tire ......................... 764
If you lose your keys ........................ 780
If you think something is
wrong ................................................... 732
If your vehicle becomes stuck ..... 793
If your vehicle has to be
stopped in an emergency ..........795
If your vehicle needs to be
towed.................................................... 725
If your vehicle overheats ............... 788D
E
*: For vehicles with a navigation system, refer to the “Navigation System Owner’s Manual”.

874What to do if...
What to do if... A tire punctures P. 76 4
If you have a flat tire
The hybrid system does not start P. 777
If the hybrid system will not start P. 1 2 4
Immobilizer system P. 7 8 4
If the vehicle 12-volt battery is discharged
The shift lever cannot be
moved out P. 7 7 9
If the shift lever cannot be shifted
from P
The engine coolant temperature
gauge enters the red zone
Steam can be seen coming
from under the hood P. 7 8 8
If your vehicle overheats
The key is lost P. 7 8 0
If you lose your keys
The 12-volt battery runs out P. 7 8 4
If the vehicle 12-volt battery is discharged
The doors cannot be locked P. 7 2
Side doors P. 7 5
Back door
The horn begins to sound P. 1 2 6
Alarm
The vehicle is stuck in mud or
sand P. 7 9 3
If the vehicle becomes stuck