Lexus NX350 (2022 year). Manual in english — page 31

●

When the engine is new, for example directly after purchasing the vehicle or after
replacing the engine

●

If low quality oil or oil of an inappropriate viscosity is used

●

When driving at high engine speeds or with a heavy load, when towing (vehicles with
towing package only), or when driving while accelerating or decelerating frequently

●

When leaving the engine idling for a long time, or when driving frequently through
heavy traffic

WARNING

●

Used engine oil contains potentially harmful contaminants which may cause skin
disorders such as inflammation and skin cancer, so care should be taken to avoid
prolonged and repeated contact. To remove used engine oil from your skin, wash
thoroughly with soap and water.

●

Dispose of used oil and filters only in a safe and acceptable manner. Do not dispose
of used oil and filters in household trash, in sewers or onto the ground. Call your
Lexus dealer, service station or auto parts store for information concerning recycling
or disposal.

●

Do not leave used engine oil within the reach of children.

NOTICE

■

When replacing the engine oil

When replacing the engine oil, observe the following precautions.

●

Be careful not to spill engine oil on the vehicle components.

●

Avoid overfilling, or the engine could be damaged.

●

Check the oil level on the dipstick every time you refill the vehicle.

●

Be sure the engine oil filler cap is properly tightened.

■

If oil is spilled on the engine cover

To prevent the engine cover from being damaged, remove any engine oil from the engine
cover as soon as possible using a neutral detergent. Do not use an organic solvent such
as brake cleaner.

Checking the engine oil

With the engine at operating temperature and turned off, check the oil level on the
dipstick.

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NOTICE

To prevent serious engine damage, check the oil level on a regular basis.

1

Park the vehicle on level ground. After warming up the engine and turning off
the engine, wait more than 5 minutes for the oil to drain back into the bottom of
the engine.

2

Holding a rag under the end, pull the dipstick
out.

3

Wipe the dipstick clean.

4

Reinsert the dipstick fully.

5

Holding a rag under the end, pull the dipstick out and check the oil level.

A

Low

B

Normal

C

Excessive

The shape of the dipstick may differ depending on
the type of vehicle or engine.

6

Wipe the dipstick and reinsert it fully.

Checking the oil type and preparing the items needed

Make sure to check the oil type and prepare the items needed before adding oil.

●

Engine oil selection

▶

NX250

▶

NX350

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●

Oil quantity (Low

→

Full)

1.6 qt. (1.5 L, 1.3 Imp.qt.)

●

Items
Clean funnel

Related Links

Lubrication system (NX350)(P. 679)
Lubrication system (NX250)(P. 680)

Adding engine oil

If the oil level is below or near the low level mark, add engine oil of the same type as
that already in the engine.

▶

NX250

▶

NX350

1

Remove the oil filler cap by turning it counterclockwise.

2

Add engine oil slowly, checking the dipstick.

3

Install the oil filler cap by turning it clockwise.

Checking the coolant

The coolant level is satisfactory if it is between the [FULL] and [LOW] lines on the
reservoir when the engine is cold.

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■

Engine coolant reservoir

▶

NX250

A

Reservoir cap

B

[FULL] line

C

[LOW] line

▶

NX350

A

Reservoir cap

B

[FULL] line

C

[LOW] line

If the level is on or below the [LOW] line, add coolant up to the [FULL] line.

■

Intercooler coolant reservoir (NX350 only)

A

Reservoir cap

B

[FULL] line

C

[LOW] line

If the level is on or below the [LOW] line, add
coolant up to the [FULL] line.

INFORMATION

■

Coolant selection

Only use "Toyota Super Long Life Coolant" or a similar high quality ethylene glycol based
non-silicate, non-amine, non-nitrite, and non-borate coolant with long-life hybrid organic
acid technology.
U.S.A.: "Toyota Super Long Life Coolant" is a mixture of 50% coolant and 50% deion-
ized water. (Minimum temperature: -31°F [-35°C])
Canada: "Toyota Super Long Life Coolant" is a mixture of 55% coolant and 45%
deionized water. (Minimum temperature: -44°F [-42°C])
For more details about coolant, contact your Lexus dealer.

8-4. Inspection of consumables

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■

If the coolant level drops within a short time of replenishing

Visually check the radiator, hoses, engine coolant reservoir cap, drain cock and water
pump.
If you cannot find a leak, have your Lexus dealer test the cap and check for leaks in the
cooling system.

WARNING

When the engine is hot, do not remove the engine coolant reservoir cap or intercooler
coolant reservoir cap (NX350 only).
The cooling system may be under pressure and may spray hot coolant if the cap is
removed, causing serious injuries, such as burns.

NOTICE

■

When adding coolant

Coolant is neither plain water nor straight antifreeze. The correct mixture of water and
antifreeze must be used to provide proper lubrication, corrosion protection and cooling.
Be sure to read the antifreeze or coolant label.

■

If you spill coolant

Be sure to wash it off with water to prevent it from damaging parts or paint.

Checking the radiator, condenser and intercooler radiator

*

Check the radiator, condenser and intercooler and clear away any foreign objects.
If any of the above parts are extremely dirty or you are not sure of their condition,
have your vehicle inspected by your Lexus dealer.

WARNING

■

When the engine is hot

Do not touch the radiator, condenser or intercooler as they may be hot and cause serious
injuries, such as burns.

■

When the electric cooling fan are operating

Do not touch the engine compartment. With the engine switch in ON, the electric
cooling fan may automatically start to run if the air conditioning is on or the coolant
temperature is high. Be sure the engine switch is OFF when working near the electric
cooling fan or radiator grille.

* :

If equipped

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Checking the brake fluid

The brake fluid level should be between the
[MAX] and [MIN] lines on the tank.

Adding the brake fluid

1

Slide and lift up the rubber strip to partly
remove it as shown.

2

Disconnect the claws and remove the service
cover.

3

Remove the reservoir cap.

4

Add brake fluid slowly while checking the fluid level.

Make sure to check the fluid type and prepare the necessary item.

●

Brake fluid type
FMVSS No.116 DOT 3 or SAE J1703; FMVSS No.116 DOT 4 or SAE J1704 brake
fluid

●

Items

8-4. Inspection of consumables

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Clean funnel

WARNING

Take care when filling the reservoir, as brake fluid can harm your hands and eyes and
damage painted surfaces.
If brake fluid gets on your hands or in your eyes, flush the affected area with clean
water immediately.
If you experience discomfort, see a doctor.

NOTICE

It is normal for the brake fluid level to go down slightly as the brake pads wear or
when the fluid level in the accumulator is high.
If the reservoir needs frequent refilling, there may be a serious problem.

INFORMATION

■

Brake fluid can absorb moisture from the air

Excess moisture in the brake fluid can cause a dangerous loss of braking efficiency.
Use only newly opened brake fluid.

Battery

WARNING

■

Chemicals in the battery

Batteries contain poisonous and corrosive sulfuric acid and may produce hydrogen gas
which is flammable and explosive. To reduce the risk of death or serious injury, take the
following precautions while working on or near the battery:

●

Do not cause sparks by touching the battery terminals with tools.

●

Do not smoke or light a match near the battery.

●

Avoid contact with eyes, skin and clothes.

●

Never inhale or swallow electrolyte.

●

Wear protective safety glasses when working near the battery.

●

Keep children away from the battery.

■

Where to safely charge the battery

Always charge the battery in an open area. Do not charge the battery in a garage or
closed room where there is insufficient ventilation.

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WARNING

■

Emergency measures regarding electrolyte

●

If electrolyte gets in your eyes, flush your eyes with clean water for at least 15 minutes
and get immediate medical attention. If possible, continue to apply water with a
sponge or cloth while traveling to the nearest medical facility.

●

If electrolyte gets on your skin, wash the affected area thoroughly. If you feel pain or
burning, get medical attention immediately.

●

If electrolyte gets on your clothes, it may soak through your clothing on to your skin.
Immediately take off the clothing and follow the procedure above if necessary.

●

If you accidentally swallow electrolyte, drink a large quantity of water or milk. Follow
that with milk of magnesia, beaten raw egg, or vegetable oil, and get emergency
medical attention immediately.

■

When there is insufficient battery fluid

Do not use if there is insufficient fluid in the battery. There is a possible danger that the
battery may explode.

Checking the battery

■

Battery exterior

Make sure that the battery terminals are not corroded and that there are no loose
connections, cracks, or loose clamps.

▶

NX250

A

Terminals

B

Hold-down clamp

▶

NX350

A

Terminals

B

Hold-down clamp

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Before recharging

When recharging, the battery produces hydrogen gas which is flammable and
explosive. Therefore, observe the following precautions before recharging:

●

If recharging with the battery installed on the vehicle, be sure to disconnect the
ground cable.

●

Make sure the power switch on the charger is off when connecting and discon-
necting the charger cables to the battery.

NOTICE

When recharging the battery, make sure that the engine is not running and all accesso-
ries are off.

After recharging or reconnecting the battery

The engine may not start. Follow the procedure below to initialize the system.

1

Change the shift position to P.

2

Open and close any of the doors.

3

Restart the engine.

INFORMATION

●

Unlocking the doors using the smart access system with push-button start may
not be possible immediately after reconnecting the battery. If this happens, use the
wireless remote control or the mechanical key to lock/unlock the doors.

●

Start the engine with the engine switch in ACC. The engine may not start with
the engine switch turned off. However, the engine will operate normally from the
second attempt.

●

The engine switch mode is recorded by the vehicle. If the battery is disconnected
and reconnected, the vehicle will return the engine switch mode to the status it
was in before the battery was disconnected. Make sure to turn off the engine
switch before disconnecting the battery. Take extra care when connecting the
battery if the engine switch mode prior to the battery being disconnected is
unknown.
If the system will not start even after multiple attempts at all the methods above,
contact your Lexus dealer.

Checking battery fluid

Check that the level is between the [UPPER LEVEL] and [LOWER LEVEL] lines.

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▶

NX250

A

[UPPER LEVEL] line

B

[LOWER LEVEL] line
If the battery fluid level is at or below the
[LOWER LEVEL] line, add distilled water.

▶

NX350

A

[UPPER LEVEL] line

B

[LOWER LEVEL] line
If the battery fluid level is at or below the
[LOWER LEVEL] line, add distilled water.

Adding distilled water

NOTICE

When adding distilled water, avoid overfilling the battery. Spilled battery fluid may cause
corrosion.

1

Remove the vent plug.

2

Add distilled water.

If the [UPPER LEVEL] line cannot be seen, check the battery fluid level by looking
directly at the cell.

A

Low

B

O.K.

3

Put the vent plug back on and close it securely.

8-4. Inspection of consumables

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Adding washer fluid

If washer fluid does not spray from any of the
washers or "Windshield Washer Fluid Low" is dis-
played on the multi-information display, the
washer fluid bottle may be empty. Add washer
fluid.

WARNING

Do not add washer fluid when the engine is hot or running.
As washer fluid contains alcohol, it may catch fire if spilled on the engine, etc.

NOTICE

■

Do not use any fluid other than washer fluid

Do not use soapy water or engine antifreeze instead of washer fluid. Doing so may cause
streaking on the vehicle’s painted surfaces, as well as damaging the pump leading to
problems of the washer fluid not spraying.

■

Diluting washer fluid

Dilute washer fluid with water as necessary. Refer to the freezing temperatures listed on
the label of the washer fluid bottle.

▶

NX250

▶

NX350

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Air conditioning filter maintenance

The air conditioning filter must be changed regularly to maintain air conditioning
efficiency.

Checking interval

Inspect and replace the air conditioning filter according to the maintenance sched-
ule. In dusty areas or areas with heavy traffic flow, early replacement may be
required.

●

If air flow from the vents decreases dramatically, the air conditioning filter may
be clogged. Check the filter and replace it if necessary.
(For scheduled maintenance information, please refer to the "Owner’s Manual
Supplement" or "Scheduled Maintenance".)

●

If air fresheners, etc. are used inside the vehicle, the service life of the deo-
dorizing function of the air conditioning filter with deodorizing function may
be reduced significantly. If odors from the air conditioning system become a
concern, replace the filter.

Replacing the air conditioning filter

NOTICE

Observe the following precautions 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.

1

Turn the engine switch off.

2

Open the glove box and disconnect the
damper stay from the pin.

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3

Push both the sides of the glove box inward
and disengage each claw on the upper side.
Then, pull the glove box to disengage the
claws on the lower side and remove the glove
box.

4

Unlock the filter cover ( ), pull the filter
cover out of the claws ( ), and remove the
filter cover.

5

Remove the filter case.

6

Remove the air conditioning filter from the
filter case and replace it with a new one.

The [

UP] marks shown on the filter should be

pointing up.

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Tire maintenance

Tire maintenance

Replace or rotate tires in accordance with maintenance schedules and treadwear.

NOTICE

Take particular care when driving on uneven rough roads with cracks and potholes.
These conditions may cause loss of tire inflation pressure, reducing the cushioning ability
of the tires. Driving on rough roads may also cause damage to the tires themselves, as
well as the vehicle’s wheels and body.

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Tire inspection items

WARNING

■

When inspecting or replacing the tires

Observe the following precautions.
Failure to do so may lead to damage to the drivetrain or unstable handling.

●

Do not mix tires of different makes, models or tread patterns. Also, do not mix tires of
remarkably different treadwear.

●

Do not use tire sizes other than those recommended by Lexus.

●

Do not mix differently constructed tires (radial, bias-belted or bias-ply tires).

●

Do not mix summer, all season and snow tires.

●

Do not use tires that have been used on another vehicle.
Do not use tires if you do not know how they were used previously.

●

Vehicles with a compact spare tire: Do not tow if your vehicle has a compact spare tire
installed.

●

Vehicles with an emergency tire puncture repair kit: Do not tow anything if a tire that
has been repaired using the emergency tire puncture repair kit is installed. The load on
the tire may cause unexpected damage to the tire.

NOTICE

If tire inflation pressure becomes low while driving, do not continue driving. Otherwise
the tire or wheel may be damaged.

Check if the treadwear indicators are showing on the tires. Also check the tires for
uneven wear, such as excessive wear on one side of the tread.
Check the spare tire condition and pressure if not rotated.

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A

New tread

B

Worn tread

C

Treadwear indicator
The location of treadwear indicators is
shown by a [TWI] or

mark, etc., molded

into the sidewall of each tire.
Replace the tires if the treadwear indicators
are showing on a tire.

INFORMATION

■

When to replace your vehicle’s tires

Tires should be replaced if:

●

The treadwear indicators are showing on a tire.

●

You have tire damage such as cuts, splits, cracks deep enough to expose the fabric,
and bulges indicating internal damage.

●

A tire goes flat repeatedly or cannot be properly repaired due to the size or location of
a cut or other damage.
If you are not sure, consult with your Lexus dealer.

■

Tire life

Any tire over 6 years old must be checked by a qualified technician even if it has seldom
or never been used or damage is not obvious.

■

Maximum load of tire

Check that the maximum load of the replacement
tire is greater than 1/2 of the Gross Axle Weight
Ratings (GAWR) of either the front axle or the rear
axle, whichever is greater.
For the GAWR, see the Certification Label.
For the maximum load of the tire, see the load limit
at maximum cold tire inflation pressure mentioned on
the sidewall of the tire.

■

Tire types

●

Summer tires

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