spare wheel LEXUS NX300h 2015 Owners Manual

2774-5. Using the driving support systems
4
Driving
NX300h_U_OM78007U WA R N I N G ■
Before using the LDA
Do not over rely on the LDA. The LDA does not drive the vehicle automatically, nor
does it reduce the amount of care you need to take. As such, the driver must always
assume full responsibility for understandin g his/her surroundings, for operating the
steering wheel to correct the driving line, and for driving safely. Also, take occasional
rests from fatigue due to driving over long periods of time, etc.
Inappropriate or negligent driving co uld lead to an unexpected accident.■
Do not drive without holding the steering wheel
While the steering control function is operating, when the system judges that the vehi-
cle is being driven without holding the steering wheel, a warning message is displayed.
(  P. 2 7 1 )
Inappropriate steering wheel operations and/or negligent driving could lead to an
unexpected accident. When driving, firmly ho ld the steering wheel and keep safe driv-
ing in mind. ■
To avoid operating the LDA by mistake
Switch the LDA off using the LDA switch when not in use. (  P. 2 7 2 )■
Situations unsuitable for LDA
Do not use the LDA in any of the following situations.
Otherwise, the system may not function correctly and could result in an accident. ●
When driving with snow tires, tire ch ains, a spare tire, or similar equipment●
When a tire with a different structure, maker, brand, or tread pattern is used. ●
When remain tread of the tire or the air pressure is insufficient●
When restructuring the suspension ●
When there are objects or structures along the roadside that might be misinterpreted
as lane markers (such as guardrails, a curb, reflector posts, etc.) ●
When driving on snowy roads ●
When pavement lane markers are difficult to see due to rain, snow, fog, sand, dust,
etc. ●
When there are visible lines on the pavement from road repairs, or if the remains of
old lane markers are still visible on the road ●
When driving on a road with lane closures due to maintenance, or when driving in a
temporary lane ●
When driving on road surfaces that are slippery from rain, snow, etc.●
When driving in traffic lanes other than highways and freeway ●
When driving through construction areas

570 8-2. Steps to take in an emergency
NX300h_U_OM78007U WA R N I N G ■
If both the ABS and the brake system warning lights remain on
Stop your vehicle in a safe place immediat ely and contact your Lexus dealer. The vehi-
cle will become extremely unstable during braking, and the ABS system may fail, which
could cause an accident resulting in death or serious injury. ■
When the electric power steering system warning light comes on
When the light comes on yellow, the assist to the power steering is restricted. When the
light comes on red, the assist to the power steering is lost and handling operations of
the steering wheel become extremely heavy. When steering wheel operations are
heavier than usual, grip the steering wheel firmly and operate it using more force than
usual. ■
If the tire pressure warning light comes on
Be sure to observe the following precautions. Failure to do so could cause a loss of
vehicle control and result in death or serious injury. ●
Stop your vehicle in a safe place as soon as possible. Adjust the tire inflation pressure
immediately. ●
If the tire pressure warning light comes on even after tire inflation pressure adjust-
ment, it is probable that you have a flat tire. Check the tires. If a tire is flat, change it
with the spare tire and have the flat tire repaired by the nearest Lexus dealer. ●
Avoid abrupt maneuvering and braking. If the vehicle tires deteriorate, you could lose
control of the steering wheel or the brakes. ■
If a blowout or sudden air leakage should occur
The tire pressure warning system may not activate immediately.

5718-2. Steps to take in an emergency
8
When trouble arises
NX300h_U_OM78007U WA R N I N G ■
Maintenance of the tires
Each tire, including the spare (if provided), should be checked monthly when cold and
inflated to the inflation pressure recomm ended by the vehicle manufacturer on the
vehicle placard or tire inflation pressure la bel (tire and load information label). (If your
vehicle has tires of a different size than the size indicated on the vehicle placard or tire
inflation pressure label [tire and load in formation label], you should determine the
proper tire inflation pressure for those tires.)
As an added safety feature, your vehicle ha s been equipped with a tire pressure moni-
toring system (TPMS-tire pressure warning system) that illuminates a low tire pressure
telltale (tire pressure warning light) when on e or more of your tires is significantly
under-inflated. Accordingly, when the low ti re pressure telltale (tire pressure warning
light) illuminates, you should stop and check your tires as soon as possible, and inflate
them to the proper pressure. Driving on a significantly under-inflated tire causes the
tire to overheat and can lead to tire failure. Under-inflation also reduces fuel efficiency
and tire tread life, and ma y affect the vehicle’s handling and stopping ability.
Please note that the TPMS (tire pressure wa rning system) is not a substitute for proper
tire maintenance, and it is the driver’s resp onsibility to maintain correct tire pressure,
even if under-inflation has no t reached the level to trigger illumination of the TPMS low
tire pressure telltale (tire pressure warning light).
Your vehicle has also been equipped with a TPMS (tire pressure warning system) mal-
function indicator to indicate when the system is not operating properly. The TPMS
(tire pressure warning system) malfunction indi cator is combined with the low tire pres-
sure telltale (tire pressure warning light). When the system detects a malfunction, the
telltale will flash for approximately one minu te and then remain continuously illumi-
nated. This sequence will cont inue upon subsequent vehicl e start-ups as long as the
malfunction exists. When the malfunction indicator is illuminated, the system may not
be able to detect or signal low tire pressure as intended.
TPMS (tire pressure warning system) malfun ctions may occur for a variety of reasons,
including the installation of replacement or alternate tires or wheels on the vehicle that
prevent the TPMS (tire pressure warning system) from functioning properly. Always
check the TPMS (tire pressure warning syst em) malfunction telltale after replacing one
or more tires or wheels on your vehicle to ensure that the replacement or alternate
tires and wheels allow the TPMS (tire pressure warning system) to continue to function
properly.
NOTICE ■
To ensure the tire pressure warning system operates properly
Do not install tires with different specificatio ns or makers, as the tire pressure warning
system may not operate properly.

575
8
When trouble arises 8-2. Steps to take in an emergency
NX300h_U_OM78007UIf you have a flat tire ●
Stop the vehicle on a hard, flat surface. ●
Set the parking brake. ●
Shift the shift lever to P. ●
Stop the hybrid system. ●
Turn on the emergency flashers. (  P. 5 5 6 )Your vehicle is equipped with a spare ti re. The flat tire can be replaced with
the spare tire.
For details about tires:  P. 5 1 6WA R N I N G ■
If you have a flat tire
Do not continue driving with a flat tire.
Driving even a short distance with a flat ti re can damage the tire and the wheel beyond
repair, which could result in an accident.
Before jacking up the vehicle

5778-2. Steps to take in an emergency
8
When trouble arises
NX300h_U_OM78007U 
Vehicle with full-size spare tire
Jack handle
Wheel nut wrench
Towing eyelet Spare tire
Jack
Screwdriver1
2
3 4
5
6

5858-2. Steps to take in an emergency
8
When trouble arises
NX300h_U_OM78007U Remove any dirt or foreign matter
from the wheel contact surface. If foreign matter is on the wheel contact
surface, the wheel nuts may loosen
while the vehicle is in motion, causing
the tire to come off.
Install the spare tire and loosely tighten each wheel nut by hand by approxi-
mately the same amount. 
Vehicle with compact spare tire Tighten the wheel nuts until the tapered
portion comes into loose contact with
the disc wheel seat. 
Vehicle with full-size spare tire Turn the wheel nuts until the washers
come into contact with the disc wheel.
Install the wheel nut wrench in jack
handle.Installing the spare tire 1
2
Disc wheel
seatTapered portion
Disc wheel Wa s h e r
3

586 8-2. Steps to take in an emergency
NX300h_U_OM78007U Lower the vehicle.
Firmly tighten each wheel nut two or
three times in the order shown in the
illustration. Tightening torque:
76 ft•lbf (103 N•m, 10.5 kgf•m)
Vehicles with a full-size spare tire:
Reinstall the wheel ornament.
Stow the flat tire, tire jack and all tools. ■
The compact spare tire (Vehicle with compact spare tire) ●
The compact spare tire is identified by the label “TEMPORARY USE ONLY” on the
tire sidewall.
Use the compact spare tire temporarily, and only in an emergency. ●
Make sure to check the tire inflation pressure of the compact spare tire. (  P. 6 1 5 )■
After completing the tire change
The tire pressure warning system must be reset. (  P. 5 1 8 )■
When using the compact spare tire (Vehicle with compact spare tire)
As the compact spare tire is not equipped wi th a tire pressure warning valve and trans-
mitter, low inflation pressure of the spare ti re will not be indicated by the tire pressure
warning system. Also, if you replace the compact spare tire after the tire pressure warn-
ing light comes on, th e light remains on.■
When the compact spare tire is equippe d (Vehicle with compact spare tire)
The vehicle becomes lower when driving with the compact spare tire compared to when
driving with standard tires. 4
5
6
7

5878-2. Steps to take in an emergency
8
When trouble arises
NX300h_U_OM78007U ■
If you have a flat front tire on a road covered with snow or ice (vehicles with a compact
spare tire and excluding the 225/60R18 tires)
Install the compact spare tire on one of the rear wheels of the vehicle. Perform the follow-
ing 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 vehicle.
Fit tire chains to the front tires.
WA R N I N G ■
When using the compact spare tire (Vehicle with compact spare tire) ●
Remember that the spare tire provided is specifically designed for use with your vehi-
cle. Do not use your spare tire on another vehicle. ●
Do not use more than one spare tire simultaneously. ●
Replace the spare tire with a stan dard tire as soon as possible.●
Avoid sudden acceleration, deceleration and braking, as well as sharp cornering. ■
When the compact spare tire is attached
The vehicle speed may not be correctly detected, and the following systems may not
operate correctly:
Also, not only can the following system not be utilized fully, but it may even negatively
affect the drive-train components: ●
E-Four (if equipped) ■
Speed limit when using the compact spare tire
Do not drive at speeds in excess of 50 mph (80 km/h) when a compact spare tire is
installed on the vehicle.
The compact spare tire is not designed for driving at high speeds. Failure to observe
this precaution may lead to an accid ent causing death or serious injury.■
After using the tools and jack
Before driving, make sure all the tools and jack are securely in place in their storage
location to reduce the possibility of personal injury during a collision or sudden brak-
ing. 1
2
3
• ABS & Brake assist
•VSC
•TRAC
•Cruise control
• Dynamic radar cruise control
(if equipped)
• Pre-collision system (if equipped)
•EPS • AVS (if equipped)
• LDA (Lane Departure Alert)
(if equipped)
• Intuitive parking assist (if equipped)
• Navigation system (if equipped)
• BSM (Blind spot monitor)
(if equipped)
• Automatic high Beam (if equipped)

588 8-2. Steps to take in an emergency
NX300h_U_OM78007U NOTICE ■
Be careful when driving over bumps with the compact spare tire installed on the vehi-
cle
The vehicle becomes lower when driving with the compact spare tire compared to
when driving with standard ti res. Be careful when driving over uneven road surfaces.■
Driving with tire chains and the compact spare tire
Do not fit tire chains to the compact spare tire.
Tire chains may damage the vehicle body and adversely affect driving performance.■
When replacing the tires
When removing or fitting the wheels, tires or the tire pressure warning valve and trans-
mitter, contact your Lexus dealer as the tire pressure warning valve and transmitter
may be damaged if not handled correctly.

616 9-1. Specifications
NX300h_U_OM78007U 
Compact spare tire Ti r e s i z e T165/80D17 104M
Spare tire inflation pressure
(Recommended cold tire
inflation pressure) 60 psi (420 kPa, 4.2 kgf/cm 2
or bar)
Wheel size 17  4 T
Wheel nut torque 76 f t •
lbf (103 N •
m, 10.5 kgf •
m)