2021 HYUNDAI I20 maintenance

7-53
07
Winter precautions
Use high quality ethylene glycol
coolant
Your vehicle is delivered with high
quality ethylene glycol coolant in the
cooling system. It is the only type of
coolant that should be used because it
helps prevent corrosion in the cooling
system, lubricates the water pump and
prevents freezing. Be sure to replace or
replenish your coolant in accordance
with the maintenance schedule in
chapter 8. Before winter, have your
coolant tested to assure that its freezing
point is sufficient for the temperatures
anticipated during the winter.
Check battery and cables
Winter puts additional burdens on the
battery system. Visually inspect the
battery and cables as described in
chapter 8. The level of charge in your
battery can be checked by an authorized
HYUNDAI dealer or a service station.
Change to “winter weight” oil if
necessary
In some climates it is recommended that
a lower viscosity “winter weight” oil be
used during cold weather. See chapter
2 for recommendations. If you aren’t
sure what weight oil you should use, we
recommend that you consult with an
authorized HYUNDAI dealer.
Check spark plugs and ignition
system
Inspect your spark plugs as described
in chapter 8 and replace them if
necessary. Also check all ignition wiring
and components to be sure they are not
cracked, worn or damaged in any way.
To keep locks from freezing
To keep the locks from freezing, squirt
an approved de-icer fluid or glycerine
into the key opening. If a lock is covered
with ice, squirt it with an approved
de-icing fluid to remove the ice. If the
lock is frozen internally, you may be able
to thaw it out by using a heated key.
Handle the heated key with care to avoid
injury.
Use approved window washer anti-
freeze in system
To keep the water in the window washer
system from freezing, add an approved
window washer anti-freeze solution in
accordance with instructions on the
container. Window washer anti-freeze is
available from an authorized HYUNDAI
dealer and most auto parts outlets. Do
not use engine coolant or other types
of anti-freeze as these may damage the
paint finish.

9-10
Emergency situations
Tire pressure monitoring system
WARNING
Over-inflation or under-inflation can
reduce tire life, adversely affect vehicle
handling, and lead to sudden tire
failure that may cause loss of vehicle
control resulting in an accident.
Each tire, including the spare (if
provided), should be checked monthly
when cold and inflated to the inflation
pressure recommended by the vehicle
manufacturer on the vehicle placard
or tire inflation pressure label. (If your
vehicle has tires of a different size
than the size indicated on the vehicle
placard or tire inflation pressure label,
you should determine the proper tire
inflation pressure for those tires.)
As an added safety feature, your
vehicle has been equipped with a tire
pressure monitoring system (TPMS)
that illuminates a low tire pressure
telltale when one or more of your tires is
significantly under-inflated.
Accordingly, when the low tire pressure
telltale 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 may affect the vehicle’s handling
and stopping ability.
Please note that the TPMS is not a
substitute for proper tire maintenance,
and it is the driver’s responsibility to
maintain correct tire pressure, even if
under-inflation has not reached the level
to trigger illumination of the TPMS low
tire pressure telltale.Your vehicle has also been equipped
with a TPMS malfunction indicator
to indicate when the system is
not operating properly. The TPMS
malfunction indicator is combined with
the low tire pressure telltale. When
the system detects a malfunction, the
telltale will flash for approximately one
minute and then remain continuously
illuminated. This sequence will continue
upon subsequent vehicle 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 malfunctions may occur for
a variety of reasons, including the
installation of replacement or alternate
tires or wheels on the vehicle that
prevent the TPMS from functioning
properly. Always check the TPMS
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 to continue to function properly.
i Information
If the TPMS indicator does not illuminate
for 3 seconds when the ignition switch
is turned to the ON position or engine
is running, or if it comes on after
blinking for approximately one minute,
we recommend that you contact an
authorized HYUNDAI dealer.

Engine compartment .................................................................................... 10-4
Maintenance services
................................................................................... 10-6
Owner’s responsibility ............................................................................................ 10-6
Owner maintenance precautions........................................................................... 10-6
Owner maintenance ..................................................................................... 10-8
Owner maintenance schedule ............................................................................... 10-8
Scheduled maintenance service ................................................................ 10-10
Normal maintenance schedule - petrol engine .................................................... 10-11
Maintenance under severe usage conditions - petrol engine
............................ 10-15
Normal maintenance schedule - diesel engine ....................................................10-17
Maintenance under severe usage conditions - diesel engine ............................10-20
Explanation of scheduled maintenance items ..........................................10-24
Engine oil
..................................................................................................... 10-26
Checking the engine oil level (Petrol Engine) .......................................................10-28
Checking the engine oil level (Diesel Engine) ......................................................10-29
Changing the engine oil and filter
......................................................................... 10-31
Engine coolant .............................................................................................10-32
Checking the coolant level .................................................................................... 10-32
Recommended engine coolant .............................................................................10-34
Changing the coolant
............................................................................................10-34
Brake/clutch fluid ........................................................................................10-35
Checking the brake/clutch fluid level ................................................................... 10-35
Intelligent Manual Transmission (iMT) System actuator fluid .................. 10-37
Checking the iMT system actuator fluid level ...................................................... 10-37
Washer fluid ................................................................................................ 10-38
Checking the washer fluid level ............................................................................10-38
Parking brake .............................................................................................. 10-39
Checking the parking brake ..................................................................................10-39
Fuel filter (for diesel) ................................................................................... 10-40
Draining water from fuel filter .............................................................................. 10-40
Fuel filter cartridge replacement
......................................................................... 10-40
Air cleaner .................................................................................................... 10-41
Filter replacement .................................................................................................. 10-41
Climate control air filter.............................................................................. 10-43
Filter inspection ..................................................................................................... 10-43
Filter replacement ................................................................................................. 10-43
10. Maintenance
10

10
Wiper blades ............................................................................................... 10-45
Blade inspection .....................................................................................................10-45
Blade replacement .................................................................................................10-45
Battery ......................................................................................................... 10-48
For best battery service ........................................................................................ 10-48
Battery capacity label
........................................................................................... 10-50
Battery recharging ................................................................................................ 10-48
Reset items ............................................................................................................ 10-49
Battery replacement
............................................................................................. 10-49
Tires and wheels ......................................................................................... 10-50
Tire care ................................................................................................................. 10-50
Recommended cold tire inflation pressures ....................................................... 10-50
Checking tire inflation pressure
............................................................................ 10-51
Tire rotation
............................................................................................................10-52
Wheel alignment and tire balance ........................................................................10-53
Tire replacement ....................................................................................................10-54
Wheel replacement
................................................................................................10-55
Tire traction
............................................................................................................10-55
Tire maintenance .................................................................................................. 10-56
Tire sidewall labeling ............................................................................................. 10-56
Low aspect ratio tire.............................................................................................. 10-59
Fuses ............................................................................................................. 10-61
Instrument panel fuse replacement .....................................................................10-62
Engine compartment panel fuse replacement ................................................... 10-63
Fuse/relay panel description
................................................................................ 10-64
Light bulbs .................................................................................................... 10-75
Headlight, Position Light, Turn signal Light bulb replacement ........................... 10-76
Side repeater light replacement ........................................................................... 10-81
Rear combination light bulb replacement
........................................................... 10-81
High mounted stop light replacement ................................................................ 10-85
License plate light bulb replacement .................................................................. 10-85
Interior light bulb replacement ............................................................................ 10-86

10-4
Maintenance
1. Engine coolant reservoir
2. Engine oil filler cap
3. Brake/clutch* fluid reservoir
4. Air cleaner
5. Fuse box 6. Battery
7. Windshield washer fluid reservoir
8. Radiator cap
9. Engine oil dipstick
ENGINE COMPARTMENT
The actual engine room in the vehicle may differ from the illustration.
OBI3090001/OBC3090003ROBI3090001/OBC3090003R
„„Petrol Engine (Kappa 1.0 T-GDI)Petrol Engine (Kappa 1.0 T-GDI)
„„Petrol Engine (Smartstream G1.2)Petrol Engine (Smartstream G1.2)

10-6
Maintenance
You should exercise the utmost care
to prevent damage to your vehicle and
injury to yourself whenever performing
any maintenance or inspection
procedures. Inadequate, incomplete
or insufficient servicing may result in
operational problems with your vehicle
that could lead to vehicle damage, an
accident, or personal injury.
Owner’s responsibility
i Information
Maintenance Service and Record
Retention are the owner’s responsibility.
We recommend in general that you have
your vehicle serviced by an authorized
HYUNDAI dealer.
You should retain documents that show
proper maintenance has been performed
on your vehicle in accordance with
the scheduled maintenance service
charts shown on the following pages.
You need this information to establish
your compliance with the servicing
and maintenance requirements of your
vehicle warranties.
Detailed warranty information is
provided in your Service Passport.
Repairs and adjustments required as
a result of improper maintenance or a
lack of required maintenance are not
covered when your vehicle is covered by
warranty.
Owner maintenance
precautions
Improper or incomplete service may
result in problems. This chapter gives
instructions only for the maintenance
items that are easy to perform.
i Information
Improper owner maintenance during the
warranty period may affect warranty
coverage. For details, read the separate
Service Passport provided with the
vehicle. If you’re unsure about any
servicing or maintenance procedure, we
recommend that the system be serviced by
an authorized HYUNDAI dealer.
WARNING
Maintenance work
• Performing maintenance work on a
vehicle can be dangerous. You can
be seriously injured while performing
some maintenance procedures.
If you lack sufficient knowledge
and experience or the proper tools
and equipment to do the work, we
recommend that the system be
serviced by an authorized HYUNDAI
dealer.
• Working under the hood with the
engine running is dangerous. It
becomes even more dangerous when
you wear jewelry or loose clothing.
These can become entangled in
moving parts and result in injury.
Therefore, if you must run the engine
while working under the hood, make
certain that you remove all jewelry
(especially rings, bracelets, watches,
and necklaces) and all neckties,
scarves, and similar loose clothing
before getting near the engine or
cooling fans.
MAINTENANCE SERVICES

10-8
Maintenance
The following lists are vehicle checks
and inspections that should be
performed at the frequencies indicated
to help ensure safe, dependable
operation of your vehicle.
Any adverse conditions should be
brought to the attention of your dealer
as soon as possible.
These Owner Maintenance Checks are
generally not covered by warranties and
you may be charged for labor, parts and
lubricants used.
WARNING
Diesel Engine
Never manipulate or modify the
injection system while running the
diesel engine or within 30 seconds
after turning OFF the diesel engine. The
high-pressure pump, high-pressure
pipes, rail, and injectors are still subject
to high pressure immediately after
stopping the diesel engine.
When the fuel leakage vents out, it
may cause serious body injury. Any
people, who are implanted with the
artificial cardiac pacemaker, should
remain away from the ECU or the
wiring harness by at least 30 cm,
while running the diesel engine. The
high currents of the electronic engine
control system produce a considerable
amount of magnetic fields.
Owner maintenance schedule
When you stop for fuel:
• Check the engine oil level.
• Check the coolant level in coolant
reservoir.
• Check the windshield washer fluid
level.
• Look for low or under-inflated tires.
• Check the radiator and condenser.
Check if the front of the radiator and
condenser are clean and not blocked
with leaves, dirt or insects etc.
If any of the above parts are extremely
dirty or you are not sure of their
condition, we recommend that you
contact an authorized HYUNDAI
dealer.
WARNING
Be careful when checking your engine
coolant level when the engine is hot.
Scalding hot coolant and steam may
blow out under pressure. This could
cause burns or other serious injury.
OWNER MAINTENANCE

10-10
Maintenance
Follow Normal Maintenance Schedule if the vehicle is usually operated where none of
the following conditions apply.
If any of the following conditions apply, you must follow the Maintenance Under
Severe Usage Conditions.
• Repeated driving short distance of less than 8 km (5 miles) in normal temperature
or less than 16 km(10 miles) in freezing temperature
• Extensive engine idling or low speed driving for long distances
• Driving on rough, dusty, muddy, unpaved, graveled or salt-spread roads
• Driving in areas using salt or other corrosive materials or in very cold weather
• Driving in the condition of inflowing sand or dust into engine
• Driving in heavy traffic area
• Driving on uphill, downhill, or mountain road repeatedly
• Using for towing or camping, and driving with loading on the roof
• Driving as a patrol car, taxi, other commercial use of vehicle towing
• Frequently driving under high speed or rapid acceleration
• Frequently driving in stop-and-go condition
• Engine oil usage which is not recommended (Mineral type, Semi-synthetic, Lower
grade spec, etc.)
If your vehicle is operated under the above conditions, you should inspect, replace
or refill more frequently than the following Normal Maintenance Schedule. After the
periods or distance shown in the chart, continue to follow the prescribed maintenance
intervals.
SCHEDULED MAINTENANCE SERVICE