2021 TOYOTA 4RUNNER engine

3825-4. Other interior features
4RUNNER (U)
NOTICE
■To prevent damage to the USB charging ports
● Do not insert foreign objects into the ports.
● Do not spill water or other liquids into the ports.
● When the USB charging ports are not in use, close the lids. If a foreign
object or liquid enters a port may cause a short circuit.
● Do not apply excessive force to or impact the USB charging port s.
● Do not disassemble or modify the USB charging ports.
■ To prevent damage to external devices
● Do not leave external devices in the vehicle. The temperature i nside the
vehicle may become high, resulting in damage to an external dev ice.
● Do not push down on or apply unnecessary force to an external device or
the cable of an external device while it is connected.
■ To prevent battery discharge
Do not use the USB charging ports for a long period of time wit h the engine
stopped.

391
Maintenance and care6
4RUNNER (U)6-1. Maintenance and care
Cleaning and protecting the vehicle exterior .......... 392
Cleaning and protecting the vehicle interior ........... 395
6-2. Maintenance Maintenance requirements ................... 398
General maintenance........ 400
Emission inspection and maintenance (I/M)
programs......................... 403
6-3. Do-it-yourself maintenance
Do-it-yourself service precautions ..................... 404
Hood ................................. 407
Engine compartment ......... 408
Tires .................................. 422
Tire inflation pressure ....... 436
Wheels .............................. 439
Air conditioning filter.......... 441
Wireless remote control/ electronic key battery ...... 443
Checking and replacing fuses ............................... 446
Light bulbs......................... 449

3936-1. Maintenance and care
6
Maintenance and care
4RUNNER (U)■
Wheels and wheel ornaments
●Remove any dirt immediately by using a neutral detergent.
● Wash detergent off with water immediately after use.
● To protect the paint from damage, make sure to observe the following pre-
cautions.
• Do not use acidic, alkaline or abrasive detergent
• Do not use hard brushes
• Do not use detergent on the wheels when they are hot, such as after driv-
ing or parking in hot weather
■ Bumpers and side moldings
Do not scrub with abrasive cleaners.
■ Plated portions
If dirt cannot be remove, clean the parts as follows:
●Use a soft cloth dampened with an approximately 5% solution of neutral
detergent and water to clean the dirt off.
● Wipe the surface with a dry, soft cloth to remove any remaining moisture.
● To remove oily deposits, use alcohol wet wipes or a similar pro duct.
■ Notes for a smart key system (if equipped)
If the door handle becomes wet while the electronic key is within the effective
range, the door may lock and unlock repeatedly. In this case, f ollow the fol-
lowing correction procedures to wash the vehicle:
• Place the electronic key in a location 6 ft. (2 m) or more awa y from the vehi-
cle. (Take care to ensure that the key is not stolen.)
• Set the electronic key to battery-saving mode to disable the s mart key sys-
tem. ( P. 121)
WARNING
■When washing the vehicle
Do not apply water to the inside of the engine compartment. Doing so may
cause the electrical components etc. to catch fire.
■ Precautions regarding the exhaust pipe
Exhaust gases cause the exhaust pipe to become quite hot.
When washing the vehicle, be careful not to touch the pipe unti l it has
cooled sufficiently, as touching hot exhaust pipe can cause bur ns.

3996-2. Maintenance
6
Maintenance and care
4RUNNER (U)■
Resetting the message indicating ma intenance is required (U.S.A. only)
After the required maintenance is performed according to the ma intenance
schedule, please reset the message.
To reset the message, follow the procedures described below:
Turn the engine switch off with the trip meter A reading shown. (P. 89)
Vehicles without a smart key system:
While pressing the display change button ( P. 89), turn the engine switch
to the “ON” position (do not start the engine because reset mod e will be
canceled).
Vehicles with a smart key system:
While pressing the display change button ( P. 89), turn the engine switch
to the IGNITION ON mode (do not start the engine because otherw ise the
reset mode will be canceled).
Continue to press and hold the button until the trip meter disp lays “000000”.
■ Allow inspection and repairs to be performed by a Toyota dealer
●Toyota technicians are well-trained specialists and are kept up to date with
the latest service information. They are well informed about th e operations
of all systems on your vehicle.
● Keep a copy of the repair order. It proves that the maintenance that has
been performed is under warranty coverage. If any problem should arise
while your vehicle is under warranty, your Toyota dealer will p romptly take
care of it.
WARNING
■ If your vehicle is no t properly maintained
Improper maintenance could result in serious damage to the vehi cle and
possible death or serious injury.
■ Handling of the battery
● Engine exhaust, some of its constituents, and a wide variety of automobile
components contain or emit chemicals known to the State of California to
cause cancer and birth defects and other reproductive harm. Wor k in a
well ventilated area.
● Oils, fuels and fluids contained in vehicles as well as waste produced by
component wear contain or emit chemicals known to the State of Califor-
nia to cause cancer and birth defects or other reproductive har m. Avoid
exposure and wash any affected area immediately.
● Battery posts, terminals and related accessories contain lead a nd lead
compounds which are known to cause brain damage. Wash your hand s
after handling. ( P. 417)
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4006-2. Maintenance
4RUNNER (U)
General maintenance
Listed below are the general maintenance items that should be
performed at the intervals specified in the “Owner’s Warranty
Information Booklet” or “Own er’s Manual Supplement/Sched-
uled Maintenance Guide”. It is recommended that any problem
you notice should be brought to the attention of your Toyota
dealer or qualified s ervice shop for advice.
Engine compartment
ItemsCheck points
BatteryCheck the connections. (P. 417)
Brake fluidIs the brake fluid at the correct level? ( P. 414)
Engine coolantIs the engine coolant at the correct level? ( P. 412)
Engine oilIs the engine oil at the correct level? (P. 410)
Exhaust systemThere should not be any fumes or strange sounds.
Power steering fluidIs the power steering fluid at the correct level?
(P. 416)
Radiator/condenserThe radiator and condenser should be free from
foreign objects. ( P. 414)
Washer fluidIs there sufficient washer fluid? (P. 420)

4026-2. Maintenance
4RUNNER (U)
Vehicle exterior
ItemsCheck points
Doors• Do the doors operate smoothly?
Engine hood• Does the engine hood lock system work properly?
Fluid leaks• There should not be any signs of fluid leakageafter the vehicle has been parked.
Tires
• Is the tire inflation pressure correct?
• The tires should not be damaged or excessively
worn.
• Have the tires been rotated according to the maintenance schedule?
• The wheel nuts should not be loose.
Windshield wipers/
rear window wiper
• The wiper blades should not show any signs of cracking, splitting, wear, contamination or defor-
mation.
• The wiper blades should clear the windshield/rear
window without streaking or skipping.
WARNING
■If the engine is running
Turn the engine off and ensure that there is adequate ventilati on before per-
forming maintenance checks.

404
4RUNNER (U)
6-3. Do-it-yourself maintenance
Do-it-yourself ser vice precautions
If you perform maintenance by yourself, be sure to follow the
correct procedure as given in these sections.
ItemsParts and tools
Battery condition (P. 417)
• Warm water• Baking soda
•Grease
• Conventional wrench (for terminal clamp bolts)
Brake fluid level
(P. 414)
• FMVSS No.116 DOT 3 or SAE J1703 brake
fluid
• Rag or paper towel
• Funnel (used only for adding brake fluid)
Engine coolant level (P. 412)
• “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
For the U.S.A.:
“Toyota Super Long Life Coolant” is pre-mixed
with 50% coolant and 50% deionized water.
For Canada:
“Toyota Super Long Life Coolant” is pre-mixed
with 55% coolant and 45% deionized water.
• Funnel (used only for adding coolant)
Engine oil level (P. 410)
• “Toyota Genuine Motor Oil” or equivalent
• Rag or paper towel
• Funnel (used only for adding engine oil)

4066-3. Do-it-yourself maintenance
4RUNNER (U)
WARNING
The engine compartment contains many mechanisms and fluids that may
move suddenly, become hot, or become electrically energized. To avoid death
or serious injury, observe the following precautions.
■When working on the engine compartment
● Keep hands, clothing and tools away from the moving fan and eng ine
drive belt.
● Be careful not to touch the engine, radiator, exhaust manifold, etc. right
after driving as they may be hot. Oil and other fluids may also be hot.
● Do not leave anything that may burn easily, such as paper and r ags, in the
engine compartment.
● Do not smoke, cause sparks or expose an open flame to fuel or t he bat-
tery. Fuel and battery fumes are flammable.
● Be extremely cautious when working on the battery. It contains poisonous
and corrosive sulfuric acid.
■ Safety glasses
Wear safety glasses to prevent flying or falling material, fluid spray, etc.
from getting in your eyes.
NOTICE
■If you remove the air cleaner filter
Driving with the air cleaner filter removed may cause excessive engine wear
due to dirt in the air.