2015 LEXUS NX300h Owners Manual

5297-3. Do-it-yourself maintenance
7
Maintenance and care
NX300h_U_OM78007U WA R N I N G ■
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 during driving, possibly causing an accident.
NOTICE ■
Replacing tire pressure warning valves and transmitters ●
Because tire repair or replacement may affect the tire pressure warning valves and
transmitters, make sure to have tires servic ed by your Lexus dealer or other qualified
service shop. In addition, make sure to pu rchase 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.

530 7-3. Do-it-yourself maintenance
NX300h_U_OM78007UAir conditioning filter Turn the power switch off.
Open the glove box. Slide off the
damper.
Push in the glove box on the vehi-
cle's outer side to disconnect the
claws. Then pull out the glove box
and disconnect the lower claws.
Remove the filter cover.The air conditioning filter must be changed regularly to maintain air condi-
tioning efficiency.
Removal method 1
2
3
4

5317-3. Do-it-yourself maintenance
7
Maintenance and care
NX300h_U_OM78007U Remove the air conditioning filter
and replace it with a new one. The “  UP” marks shown on the filter
should be pointing up. ■
Checking interval
Inspect and replace the air conditioning filt er according to the ma intenance schedule. In
dusty areas or areas with heavy traffic flow, early replacement may be required. (For
scheduled maintenance informat ion, please refer to the “Owner’s Manual Supplement”
or “Scheduled Maintenance”.) ■
If air flow from the vents decreases dramatically
The filter may be clogged. Check the filter and replace if necessary. 5
NOTICE ■
When using the air conditioning system
Make sure that a filter is always installed.
Using the air conditioning system without a filter may cause damage to the system.

532 7-3. Do-it-yourself maintenance
NX300h_U_OM78007UElectronic key battery ●
Flathead screwdriver ●
Lithium battery CR2032
Take out the mechanical key.
Remove the cover. To prevent damage to the key, cover the
tip of the flathead screwdriver with a
tape.
Remove the depleted battery. Insert a new battery with the “+” termi-
nal facing up.Replace the battery with a new one if it is depleted.
You will need the following items:
Replacing the battery 1
2
3

5337-3. Do-it-yourself maintenance
7
Maintenance and care
NX300h_U_OM78007U ■
Use a CR2032 lithium battery ●
Batteries can be purchased at your Lexus dealer, local 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. ■
When the card key battery needs to be replaced (if equipped)
The battery for the card key is available only at Lexus dealers. Your Lexus dealer can
replace the battery for you. ■
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 range will be reduced.
WA R N I N G ■
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 could result in death or serious injury.
NOTICE ■
For normal operation afte r 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 component inside the remote control. ●
Do not bend either of the battery terminals.

534 7-3. Do-it-yourself maintenance
NX300h_U_OM78007UChecking and replacing fuses Turn the power switch off.
Open the fuse box cover.If any of the electrical components do not operate, a fuse may have blown. If
this happens, check and replace the fuses as necessary. 1
2 
Engine compartment: type A fuse
box 
Engine compartment: type B fuse
box
Push the tab in and lift the lid off. Push the tab in and lift the lid off. 
Left side instrument panel
Remove the lid.

5357-3. Do-it-yourself maintenance
7
Maintenance and care
NX300h_U_OM78007U 
Luggage compartment
Remove the fuse.
Only type A fuse can be removed
using the pullout tool. 3

536 7-3. Do-it-yourself maintenance
NX300h_U_OM78007U Check if the fuse is blown.
Normal fuse
Blown fuse Replace the blown fuse with a new fuse of an appropriate amperage rating. The
amperage rating can be found on the fuse box lid.
■
After a fuse is replaced ●
If the lights do not turn on even after the fuse has been replaced, a bulb may need
replacement. (  P. 5 3 8 )●
If the replaced fuse blows again, have the vehicle inspected by your Lexus dealer. ■
If there is an overload in a circuit
The fuses are designed to blow, protec ting the wiring harness from damage.■
When replacing light bulbs
Lexus recommends that you use genuine Lexu s products designed for this vehicle.
Because certain bulbs are connected to circui ts designed to prevent overload, nongenu-
ine parts or parts not designed for this vehicle may be unusable. 4
1
2
Ty p e A 
Ty p e B
Ty p e C 
Ty p e D