2018 LEXUS NX300h Owners Manual

4018-1. Specifications
LEXUS NX300h Owners Manu-
al_USA_OM78212U 8
Vehicle specifications This number is also stamped under the
right-hand front seat. ■
Engine number
The engine number is stamped on the
engine block as shown.

FrontEngine Model 2.5 L 4-cylinder (2AR-FXE)
Type 4-cylinder in line, 4-cycle, gasoline
Bore and stroke 3.54 × 3.86 in. (90.0 × 98.0 mm)
Displacement 152.2 cu.in. (2494 cm 3
)
Valve clearance (engine cold) Automatic adjustment
Drive belt tension Automatic adjustment
Fuel Fuel type Unleaded gasoline only
Octane Rating 87 (Research Octane Number 91) or higher
Fuel tank capacity (Reference) 14.8 gal. (56 L, 12.3 Imp.gal.)
Electric motor (traction motor) Type Permanent magnet synchronous motor
Maximum output 105 kW
Maximum torque 199 ft•lbf (270 N•m, 27.5 kgf•m)

402 8-1. Specifications
LEXUS NX300h Owners Manu-
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Rear
■
Oil capacity (Drain and refill [Reference*]) *
: The engine oil capacity is a reference quantity to be used when changing the engine oil.
Warm up the engine and turn off the hybrid system, wait more than 5 minutes, and check
the oil level on the dipstick.■
Engine oil selection
“Toyota Genuine Motor Oil” is used in
your Lexus vehicle. Use Lexus
approved “Toyota Genuine Motor Oil”
or equivalent to satisfy the following
grade and viscosity.
Oil grade: ILSAC GF-5 multigrade
engine oil
Recommended viscosity: SAE 0W-20
SAE 0W-20 is the best choice for
good fuel economy and good starting
in cold weather.
If SAE 0W-20 is not available, SAE 5W-20 oil may be used. However, it
must be replaced with SAE 0W-20 at
the next oil change.
Outside temperature
Oil viscosity (0W-20 is explained here Type Permanent magnet synchronous motor
Maximum output 50 kW
Maximum torque 103 ft•lbf (139 N•m, 14.2 kgf•m)
Hybrid battery (traction battery) Type Nickel-Metal hydride battery
Voltage 7.2 V/module
Capacity 6.5 Ah (3HR)
Quantity 34 modules
Overall voltage 244.8 V
Lubrication system With filter 4.6 qt. (4.4 L, 3.9 Imp.qt.)
Without filter 4.2 qt. (4.0 L, 3.5 Imp.qt.)
A

4038-1. Specifications
LEXUS NX300h Owners Manu-
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Vehicle specifications as an example):
• The 0W in 0W-20 indicates the
characteristic of the oil which allows
cold startability. Oils with a lower
value before the W allow for easier
starting of the engine in cold
weather.
• The 20 in 0W-20 indicates the vis-
cosity characteristic of the oil when
the oil is at high temperature. An oil
with a higher viscosity (one with a
higher value) may be better suited if
the vehicle is operated at high
speeds, or under extreme load con-
ditions. How to read oil container label:
The International Lubricant Specifica-
tion Advisory Committee (ILSAC)
Certification Mark is added to some oil
containers to help you select the oil you
should use.
*
: The coolant capacity is the quantity of reference.
If replacement is necessary, contact your Lexus dealer.Cooling system Capacity *
Gasoline
engine 
Vehicles with towing package
7.7 qt. (7.3 L, 6.4 Imp.qt.) 
Vehicles without towing package
7.1 qt. (6.7 L, 5.9 Imp.qt.)
Power con-
trol unit 3.3 qt. (3.1 L, 2.7 Imp.qt.)
Coolant type Use either of the following:
• “Toyota Super Long Life Coolant”
• Similar high-quality ethy lene glycol-based non-
silicate, non-amine, non-nitrite, and nonborate
coolant with long-life hy brid organic acid tech-
nology
Do not use plain water alone.

404 8-1. Specifications
LEXUS NX300h Owners Manu-
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Spark plug
■
12-volt Battery
■
Charging rates
*
: The fluid capacity is the quantity of reference.
If replacement is necessary, contact your Lexus dealer.Ignition system Make DENSO FK16HR-A8
Gap 0.03 in. (0.8 mm)
NOTICE■
Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust the spark plug gap.
Electrical system Specific voltage reading
at 68°F (20°C): 12.0 V or higher
If the voltage is lower th an the standard value,
charge the battery.
(After charging the battery, turn on the high beam
headlights for 30 seconds with the power switch
off, and turn the headlights off.)
Quick charge
Slow charge 15 A max.
5 A max.
Hybrid transmission Fluid capacity * 
Front
4.0 qt. (3.8 L, 3.3 Imp.qt.)
Fluid type Toyota Genuine ATF WS
NOTICE
■
Transmission fluid type
Using transmission fluid other than “Toyota Genuine ATF WS” may ultimately damage
the hybrid transmission of your vehicle.

4058-1. Specifications
LEXUS NX300h Owners Manu-
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Vehicle specifications *
: The fluid capacity is the quantity of reference.
If replacement is necessary, contact your Lexus dealer.
*
: Minimum pedal clearance when depressed with a force of 110 lbf (490 N, 50.0 kgf)
while the hybrid system is operating.Rear differential (Rear electric motor) Fluid capacity *
1.9 qt. (1.8 L, 1.6 Imp.qt.)
Fluid type Toyota Genuine ATF WS
NOTICE■
Transmission fluid type
Using transmission fluid other than “Toyota Genuine ATF WS” may ca use deterioration in
shift quality, locking up of your transmission accompanied by vibration, and ultimately
damage the transmission of your vehicle.
Brakes Pedal clearance *
4.13 in. (105 mm) Min.
Brake pad wear limit 0.04 in. (1.0 mm)
Pedal free play 0.04 — 0.24 in. (1.0 — 6.0 mm)
Fluid type FMVSS No. 116 DOT 3 or SAE J1703
FMVSS No. 116 DOT 4 or SAE J1704
Steering Free play Less than 1.2 in. (30 mm)

406 8-1. Specifications
LEXUS NX300h Owners Manu-
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Type A

Type BTires and wheels Tire size 225/65R17 102H
Tire inflation pressure
(Recommended cold tire inflation
pressure) Driving under normal conditions 
Front
35 psi (240 kPa, 2.4 kgf/cm 2
or bar)
Rear
35 psi (240 kPa, 2.4 kgf/cm 2
or bar)
Driving at high speeds (above 100 mph [160 km/
h]) (in countries where such speeds are permitted
by law)
Add 1 psi (10 kPa, 0.1 kgf/cm 2
or bar) to the front
and rear tires. Never exceed the maximum cold tire
inflation pressure indica ted on the tire sidewall.
Wheel size 17 × 7 J
Wheel nut torque 76 ft•lbf (103 N•m, 10.5 kgf•m)
Tire size 225/60R18 100H
Tire inflation pressure
(Recommended cold tire inflation
pressure) Driving under normal conditions 
Front
32 psi (220 kPa, 2.2 kgf/cm 2
or bar)
Rear
32 psi (220 kPa, 2.2 kgf/cm 2
or bar)
Driving at high speeds (above 100 mph [160 km/
h]) (in countries where such speeds are permitted
by law)
Add 9 psi (60 kPa, 0.6 kgf/cm 2
or bar) to the front
and rear tires. Never exceed the maximum cold tire
inflation pressure indica ted on the tire sidewall.
Wheel size 18 × 7 1/2 J
Wheel nut torque 76 ft•lbf (103 N•m, 10.5 kgf•m)

4078-1. Specifications
LEXUS NX300h Owners Manu-
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Vehicle specifications 
Compact spare tire
A: Wedge base bulbs (clear)
B: Wedge base bulbs (amber) *
:If equippedTire size 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 ft•lbf (103 N•m, 10.5 kgf•m)
Light bulbs Light bulbs Bulb No. W Type
Exterior Front side marker lights (bulb
type) W5W 5 A
Front turn signal lights (bulb
type)* 585
(WY21W) 21 B
Interior Vanity lights ⎯ 8 A

408 8-1. Specifications
LEXUS NX300h Owners Manu-
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Gasoline quality
In very few cases, driveability problems may
be caused by the brand of gasoline you are
using. If driveability problems persist, try
changing the brand of gasoline. If this does
not correct the problem, consult your Lexus
dealer. ■
Gasoline quality standards●
Automotive manufacturers in the U.S.A.,
Europe and Japan have developed a
specification for fuel quality called the
World-Wide Fuel Charter (WWFC),
which is expected to be applied world-
wide.●
The WWFC consists of four categories
that are based on required emission lev-
els. In the U.S., category 4 has been
adopted.
●
The WWFC improves air quality by low-
ering emissions in vehicle fleets, and
improves customer satisfaction through
better performance.
■
Recommendation of the use of gasoline
containing detergent additives
●
Lexus recommends the use of gasoline
that contains detergent additives to avoid
the build-up of engine deposits.
●
All gasoline sold in the U.S.A. contains
minimum detergent additives to clean
and/or keep clean intake systems, per EPA’s lowest additives concentration pro-
gram. ●
Lexus strongly recommends the use of
Top Tier Detergent Gasoline. For more
information on Top Tier Detergent Gaso-
line and a list of marketers, please go to
the official website www.toptiergas.com. ■
Recommendation of the use of low
emissions gasoline
Gasolines containing oxygenates such as
ethers and ethanol, as well as reformulated
gasolines, are available in some cities.
These fuels are typically acceptable for use,
providing they meet other fuel require-
ments.
Lexus recommends these fuels, since the
formulations allow for reduced vehicle
emissions. ■
Non-recommendation of the use of
blended gasoline ●
Use only gasoline containing up to 15%
ethanol.
DO NOT use any flex-fuel or gasoline
that could contain more than 15% etha-
nol, including from any pump labeled
E30 (30% ethanol ), E50 (50% etha-
nol ), E85 (85% ethanol ) (which
are only some examples of fuel contain-
ing more than 15% ethanol).
●
If you use gasohol in your vehicle, be sure
that it has an octane rating no lower than
87.
●
Lexus does not recommend the use of
gasoline containing methanol.
■
Non-recommendation of the use of gas-
oline containing MMT
Some gasoline contains an octane enhanc-
ing additive called MMT (Methylcyclopen-
tadienyl Manganese Tricarbonyl).Fuel information You must only use unleaded gaso-
line in your vehicle.
Select octane rating 87 (Research
Octane Number 91) or higher. Use
of unleaded gasoline with an octane
rating lower than 87 may result in
engine knocking. Persistent knock-
ing can lead to engine damage.
At minimum, the gasoline you use
should meet the specifications of
ASTM D4814 in the U.S.A.
A
B C