2021 HYUNDAI TUCSON HYBRID check oil

9. Maintenance
Engine compartment ........................................................................\
................9-3
Main tenance services
........................................................................\
............... 9-4
Owner’s responsibility ........................................................................\
........................ 9-4
Owner maint enance precautions........................................................................\
....... 9-4
Owner maintenance ........................................................................\
................. 9-5Owner maintenance schedule ........................................................................\
............9-5
Scheduled maintenance services .....................................................................9 -7Normal Maintenance Schedule ........................................................................\
.......... 9-8
Maint enance under severe usage conditions .......................................................... 9-
11
Explanation of scheduled maintenance items ..............................................9-13
E ngine oil
........................................................................\
.................................. 9-

15
Checking the engine oil level ........................................................................\
............9-15
Checking the engine oil and filt er ........................................................................\
..... 9-
16
Engine coolant/inverter coolant .....................................................................9-17Checking the coolant level ........................................................................\
................. 9-17
Changing coolan t ........................................................................\
............................... 9-
19
Hybrid Starter & Generator (HSG) belt ..........................................................9-20Checking the Hybrid Starter & Generator (HSG) belt .............................................9-20
Brake fluid ........................................................................\
............................... 9-20Checking the brake fluid level ........................................................................\
..........9-20
Washer fluid ........................................................................\
............................. 9-21Checking the washer fluid level ........................................................................\
........9-21
Air cleaner ........................................................................\
............................... 9-22Filter replacement ........................................................................\
..............................9-22
Cabin air filter ........................................................................\
..........................9-23Filter inspection ........................................................................\
.................................. 9-23
Filt er replacement ........................................................................\
.............................. 9-
23
Wiper blades ........................................................................\
...........................9-2 4Blade inspection ........................................................................\
.................................9-2 4
Blade replacement ........................................................................\
............................. 9
-24
Battery ........................................................................\
.....................................9-28Battery capacity label ........................................................................\
........................9-29
Ba ttery recharging ........................................................................\
............................. 9-
29
Reset items
........................................................................\
........................................ 9-

30
Maintenance
9

09
9 -7
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 5 miles (8 km) in normal temperature or
less than 10 miles (16 km) 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 heavy dust conditions
• 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, etc.)
Information
• As it is normal for engine oil to be consumed during driving, the engine oil level should
be checked on regular basis.
• The engine oil change interval for normal operating conditions is based on the use of
the recommended engine specification. If the recommended engine oil specification
is not used, then replace the engine oil according to the maintenance schedule under
severe operating conditions.
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 sErvicEs

Maintenance
9-8
The following maintenance services must be performed to ensure good emission control and performance.
Keep receipts for all vehicle emission services to protect your warranty. Where both mileage and time are shown, the frequency of
service is determined by whichever occurs first.
MAINTENANCE INTERVALS
MAINTENANCE
ITEM Number of months or driving distance, whichever comes first
Months 12 24 36 48 60 72 84 96 108 120 132 144 156 168 180 Milesx1,000 8 16 24 32 40 48 56 64 72 80 88 96 104 112 120Kmx1,000 13 26 39 52 65 78 91 104 117 130 143 156 169 182 195
HSG belts
*1
Inspect every 8,000 miles (13,000 km) or 12 months,
and replace every 56,000 miles(90,000 km) or 84 months
Engine oil and engine oil filter
*2 *3
R R R R R R R R R R R R R R R
Fuel additives
*4
Add every 8,000 miles (13,000 km) or 12 months
Air cleaner filter I I R I I R I I R I I R I I R
Spark plugs Replace every 46,000 miles (75,000 km)
Rotate tires Rotate tires every 8,000 miles (13,000 km)
Climate control air filter I R I R I R I R I R I R I R I
Vacuum hose I I I I I I I I I I I I I I I
Engine coolant / Inverter coolant At first, replace at 80,000 miles (130,000 km) or 10 years.
After that, replace every 24,000 miles (39,000 km) or 24 months
I : Inspect and if necessary, adjust, correct, clean or replace.
R : Replace or change.*1 : The drive belt should be replaced when cracks occur or tension is reduced excessively.
*2 : Requires API SN PLUS (or above) grade engine oil. If a lower grade engine oil is used, then the engine oil and engine oil filter
must be replaced at every 5,000 miles (8,000 km) or 6 months as indicated for severe maintenance condition.
*3 : As it is normal for engine oil to be consumed during driving, the amount of engine oil should be checked regularly.
*4 : If TOP TIER Detergent Gasoline is not available, one bottle of additive is recommended. Additives are available from your
authorized HYUNDAI dealer along with information on how to use them. Do not mix other additives.
Normal Maintenance Schedule

09
9-13
Engine oil and filter
The engine oil and filter should be
changed at the intervals specified in the
maintenance schedule. If the vehicle
is being driven in severe conditions,
more frequent oil and filter changes are
required.
HSG (Hybrid Starter & Generator)
belt
The HSG belt should be changed at the
intervals specified in the maintenance
schedule.
Fuel lines, fuel hoses and
connections
Check the fuel lines, fuel hoses and
connections for leakage and damage.
We recommend an authorized HYUNDAI
dealer replace any damaged or leaking
parts immediately.
Fuel filter
A clogged filter can limit the speed
at which the vehicle may be driven,
damage the emission system and cause
multiple issues such as hard starting. If
an excessive amount of foreign matter
accumulates in the fuel tank, the
filter may require replacement more
frequently. After installing a new filter,
run the engine for several minutes,
and check for leaks at the connections.
Fuel filters should be installed by an
authorized HYUNDAI dealer.
Vapor hose and fuel filler cap
The vapor hose and fuel filler cap should
be inspected at those intervals specified
in the maintenance schedule. Your
HYUNDAI dealer will help to determine if
replacement is needed.
Air cleaner filter
A genuine HYUNDAI air cleaner filter
is recommended when the filter is
replaced.
Spark plugs
Make sure to install new spark plugs of
the correct heat range.
When installing new spark plugs, be sure
that the ignition coils are clean and free
of any oil or debris. Clean and wipe off
the bottom portion of the ignition coil in
order to prevent any contamination with
the spark plug during installation.
WARNING
Do not remove spark plugs from the
vehicle when the engine is hot. You
may damage the engine and may also
risk burn injury.
Cooling system
Check cooling system components, such
as radiator, coolant reservoir, hoses and
connections for leakage and damage.
Replace any damaged parts.
Engine coolant/inverter coolant
The coolant should be changed at the
intervals specified in the maintenance
schedule.
Automatic transmission fluid
The automatic transmission fluid level
does not need to be checked under
normal usage conditions.
We recommend that the automatic
transmission fluid is changed by an
authorized HYUNDAI dealer according to
the maintenance schedule.
Explanation of schEdulEd maintEnancE itEms

09
9-15
Checking the engine oil level
Engine oil is used for lubricating,
cooling, and operating various hydraulic
components in the engine. Engine oil
consumption while driving is normal,
and it is necessary to check and refill the
engine oil regularly. Also, check and refill
the oil level within the recommended
maintenance schedule to prevent
deterioration of oil performance.
Check the engine oil following the below
procedure.
1.
Follo
w all of the oil manufacturer’s
precautions.
2.
Be sure the v

ehicle is on the level
ground in P (Park) with the parking
brake set and the wheels blocked.
3.
Turn the engine on and w

arm
the engine up until the coolant
temperature reaches a constant
normal temperature.
4.
Turn the engine o

ff, remove the oil
filler cap and pull the dipstick out.
Wait for 15 minutes for the oil to return
to the oil pan.
5.
Wipe the dipstick clean and r

e-insert
it fully.
ONX4H090002
6. Pull the dipstick out again and check
the le vel. The level should be between
F (Full) and L (Low).
ONX4H090020
7. Check if the oil lev el is between the
F-L line and refill it if the oil level is
below the L, add enough oil to bring
the level to F.
Use only the specified engine oil (Refer
to “Recommended Lubricants and
Capacities” section in chapter 2).
NOTICE
To prevent damage to your engine:
• Do not overfill with engine oil. Add oil
in small quantities and recheck level
to ensure engine is not overfilled.
• The engine oil consumption may
increase while you break in a new
vehicle and it will be stabilized after
driving 3,750 miles.
• The engine oil consumption can be
affected by driving habits, climate
conditions, traffic conditions,
oil quality, etc. Therefore, it is
recommended that you inspect the
engine oil level regularly and refill it
if necessary.
EnginE oil

Maintenance
9-16
Checking the engine oil and
filter
We recommend that the engine oil
and filter be changed by an authorized
HYUNDAI dealer according to the
Maintenance Schedule at the beginning
of this chapter.
• If the maintenance schedule to
replace engine oil is exceeded,
the engine oil performance may
deteriorate, and the engine condition
may be affected. Therefore, replace
the engine oil according to the
maintenance schedule.
• To keep the engine in optimal
condition, use the recommended
engine oil and filter. If the
recommended engine oil and filter are
not used replace it according to the
maintenance schedule under severe
usage conditions.
• The engine oil change interval is
set for the purpose of preventing
oil deterioration, and is not related
the amount of oil consumption; so,
check and refill the amount of the oil
regularly.
Information
When the oil pressure is low due to
insufficient engine oil, the Engine
Oil Pressure (
) warning light will
illuminate. In addition, the enhanced
engine protection system, which limits
the engine’s power is activated and the
Malfunction Indicator Lamp (
) will
illuminate when the vehicle is driven in
this state continuously. When oil pressure
is restored, the Engine Oil Pressure
warning light will turn off and the engine
power will no longer be limited.
WARNING
CALIFORNIA PROPOSITION 65
WARNING
Engine oil contains chemicals known to
the State of California to cause cancer,
birth defects and reproductive harm.
Used engine oil may cause irritation or
cancer of the skin if left in contact with
the skin for prolonged periods of time.
Always protect your skin by washing
your hands thoroughly with soap and
warm water as soon as possible after
handling used oil.

09
9-21
washEr fluid
Checking the washer fluid level
ONX4H090010
Check the fluid level in the washer fluid
reservoir and add fluid if necessary.
Plain water may be used during summer
months if washer fluid is not available.
However, use washer solvent with
antifreeze characteristics in cold climates
to prevent freezing.
WARNING
To prevent serious injury or death, take
the following safety precautions when
using washer fluid:
• Do not use engine coolant or
antifreeze in the washer fluid
reservoir. Engine coolant can
severely obscure visibility when
sprayed on the windshield and
may cause loss of vehicle control
resulting in an accident or damage to
paint and body trim.
• Do not allow sparks or flame to
contact the washer fluid or the
washer fluid reservoir. Washer fluid
may contain alcohol and can be
flammable.
• Do not drink washer fluid and avoid
contact with skin. Washer fluid is
harmful to humans and animals.
• Keep washer fluid away from
children and animals.
WARNING
Do not allow brake fluid to come in
contact with your eyes. If brake fluid
comes in contact with your eyes, flush
your eyes with clean water for at least
15 minutes and get immediate medical
attention.
NOTICE
• Do not allow brake fluid to contact
the vehicle’s body paint, as paint
damage will result.
• Brake fluid, which has been exposed
to open air for an extended time
should NEVER be used as its quality
cannot be guaranteed. It should be
disposed of properly.
• Do not use the wrong kind of brake
fluid. A few drops of mineral based
oil, such as engine oil, in your brake
system can damage brake system
parts.
Information
Use only the specified brake fluid (refer
to “Recommended Lubricants and
Capacities” section in chapter 2).

Maintenance
9-22
Filter replacement
ONX4H090011
Do not attempt to wash or to rinse it, as
water will damage the filter.
If soiled, the air cleaner filter must be
replaced.
Replace the filter according to the
Maintenance Schedule.
ONX4H090012
1. Loosen the air cleaner cover attaching
clips and open the cover.
OTMH090023
2. Wipe the inside of the air cleaner .
3.
Replace the air cleaner filt
er.
4.
Lock the co

ver with the cover
attaching clips.
5.
Check that the co

ver is firmly
installed.
Information
If the vehicle is operated in extremely
dusty or sandy areas, replace the air
cleaner filter more often than the
usual recommended intervals (Refer
to “Maintenance Under Severe Usage
Conditions” section in this chapter).
NOTICE
• Do not drive with the air cleaner filter
removed. This will result in excessive
engine wear.
• When removing the air cleaner filter,
be careful that dust or dirt does not
enter the air intake, or damage may
result.
• Use HYUNDAI genuine parts or the
equivalent speficied for your vehicle.
Use of parts without the matching
quality could damage the air flow
sensor.
air clEanEr