engine HYUNDAI SONATA 2023 Owners Manual

8-3
08
1. Engine coolant reservoir
2. Brake fluid reservoir
3. Air cleaner
4. Engine oil dipstick 5. Engine oil filler cap
6. Windshield washer fluid reservoir
7.
Fuse box
8. Battery
EnginE CompartmEnt
„„Smartstream G1.6 T-GDI
„„Smartstream G2.5 GDI
The actual engine room in the vehicle may differ from the illustration.ODN8089103/ ODN8N080008L

8-4
Maintenance
„„Smartstream G2.5 T-GDI
The actual engine room in the vehicle may differ from the illustration.ODN8N080009L
1. Engine coolant reservoir
2. Brake fluid reservoir
3. Air cleaner
4. Engine oil dipstick 5. Engine oil filler cap
6. Windshield washer fluid reservoir
7.
Fuse box
8. Battery

Maintenance
8-6
WARNING
Performing maintenance work on a
vehicle can be dangerous. If you lack
sufficient knowledge and experience or
the proper tools and equipment to do
the work, have it done by an authorized
HYUNDAI dealer.
ALWAYS follow these precautions for
performing maintenance work: • Park your vehicle on level ground,
move the shift button into the P
(Park) position, place the ignition
switch in the LOCK/OFF position.
• Block the tires (front and back) to
prevent the vehicle from moving.
Remove loose clothing or jewelry
that can become entangled in
moving parts.
• If you must run the engine during
maintenance, do so out doors or in
an area with plenty of ventilation.
• Keep flames, sparks, or smoking
materials away from the battery and
fuel-related parts. The following lists are vehicle checks and
inspections that should be performed
by the owner or an authorized HYUNDAI
dealer 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 vehicle
checks are generally not covered by
warranties and you may be charged for
labor, parts and lubricants used.
Owner Maintenance Schedule
When you stop for fuel: •
Check the coolant level in the engine
coolant reservoir.
• Check the windshield washer fluid
level.
• Check the for low or under-inflated
tires.
WARNING
Be careful when checking your engine
coolant level when the engine is hot.
This may result in coolant being blown
out of the opening and cause serious
burns and other injuries.
ownEr maintEnanCE

08
8 -7
While operating your vehicle: •
Note any changes in the sound of the
exhaust or any smell of exhaust fumes
in the vehicle.
• Check for vibrations in the steering
wheel. Notice if there is any increased
steering effort or looseness in the
steering wheel, or change in its
straight-ahead position.
• Notice if your vehicle constantly turns
slightly or “pulls” to one side when
traveling on smooth, level road.
• When stopping, listen and check for
unusual sounds, pulling to one side,
increased brake pedal travel or “hard-
to-push” brake pedal.
• If any slipping or changes in the
operation of your transmission occurs,
check the transmission fluid level.
• Check the automatic transmission P
(Park) function.
• Check the parking brake.
• Check for fluid leaks under your
vehicle (water dripping from the air
conditioning system during or after use is normal).
At least monthly: • Check coolant level in the engine
coolant reservoir.
• Check the operation of all exterior
lights, including the brake lights, turn
signals and hazard warning flashers.
• Check the inflation pressures of all
tires including the spare for tires that
are worn, show uneven wear, or are damaged.
• Check for loose wheel lug nuts. At least twice a year:
(i.e., every Spring and Autumn) •
Check radiator, heater and air
conditioning hoses for leaks or damage.
• Check windshield washer spray and
wiper operation. Clean wiper blades
with a clean cloth dampened with
washer a fluid.
• Check headlamp alignment.
• Check muffler, exhaust pipes, shields and clamps.
• Check the seat belts for wear and function.
At least once a year: • Clean body and door drain holes.
• Lubricate door hinges and hood hinges.
• Lubricate door and hood locks and
latches.
• Lubricate door rubber weather strips.
• Lubricate door checker.
• Check the air conditioning system.
• Inspect and lubricate automatic
transmission linkage and controls.
• Clean the battery and terminals.
• Check the brake fluid level.

Maintenance
8-8
*1 : If TOP TIER Detergent Gasoline is not available, one bottle of Fuel Injector Cleaner is recommended. Fuel Injector Cleaners are
available from your authorized HYUNDAI dealer along with information on how to use them. Do not mix other Fuel Injector
Cleaners.Maintenance Schedule (Smartstream G1.6 T-GDI)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.
R : Replace A : Add S : Service I : Inspect L : Lubricate r : RotateSCHEDULED maintEnanCE SErviCESDESCRIPTION KILOMETERS X 1000
8 16 24 32 40 48 56 64 72 80 88 96 104 112 120 128 136 144 152 160
MONTHS 6 12 18 24 30 36 42 48 54 60 66 72 78 84 90 96 102 108 114 120Engine Oil And Filter
Replacement (Synthetic oil) R R R R R R R R R R R R R R R R R R R R
Steering gear box, linkage and
boots I I I I I I I I I I I I I I I I I I I I
Drive shafts and boots I I I I I I I I I I I I I I I I I I I I
Vacuum Hose I I I I I I I I I I I I I I I I I I I I
All Latch, Hinges and Locks L L L L L L L L L L L L L L L L L L L L
Rotate tire or perform seasonal
tire change r r r r r r r r r r
Fuel Injector Cleaner * 1
A A A A A A A A A A

Maintenance
8-10
Maintenance Schedule (Smartstream G1.6 T-GDI) (CONT)R : Replace A : Add S : Service I : Inspect L : Lubricate r : RotateDESCRIPTIONKILOMETERS X 1000
8 16 24 32 40 48 56 64 72 80 88 96 104 112 120 128 136 144 152 160
MONTHS 6 12 18 24 30 36 42 48 54 60 66 72 78 84 90 96 102 108 114 120Fuel Tank, Fuel Filler Cap,
Canister, Vapor Hose I I I I I
Fuel Tank Air Filter I I I I I
Fuel Filter I I I I I
Fuel Lines, Hoses and Connections I I I I I
Air Cleaner Filter I R I R I R I R I R Brake fluid I I R I I R I I R ISpark plugs Replace every 72,000 km
Engine Coolant First, replace 192,000 km or 120 months.
After that, replace every 48,000 km or 24 months

Maintenance
8-12
*1 : If TOP TIER Detergent Gasoline is not available, one bottle of Fuel Injector Cleaner is recommended. Fuel Injector Cleaners are
available from your authorized HYUNDAI dealer along with information on how to use them. Do not mix other Fuel Injector
Cleaners.Maintenance Schedule (Smartstream G2.5 GDI)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.
R : Replace A : Add S : Service I : Inspect L : Lubricate r : RotateDESCRIPTION KILOMETERS X 1000
8 16 24 32 40 48 56 64 72 80 88 96 104 112 120 128 136 144 152 160
MONTHS 6 12 18 24 30 36 42 48 54 60 66 72 78 84 90 96 102 108 114 120Engine Oil And Filter
Replacement (Synthetic oil) R R R R R R R R R R R R R R R R R R R R
Steering gear box, linkage and
boots I I I I I I I I I I I I I I I I I I I I
Drive shafts and boots I I I I I I I I I I I I I I I I I I I I
Vacuum Hose I I I I I I I I I I I I I I I I I I I I
All Latch, Hinges and Locks L L L L L L L L L L L L L L L L L L L L
Rotate tire or perform seasonal
tire change r r r r r r r r r r
Fuel Injector Cleaner * 1
A A A A A A A A A A

Maintenance
8-14
Maintenance Schedule (Smartstream G2.5 GDI) (CONT)R : Replace A : Add S : Service I : Inspect L : Lubricate r : RotateDESCRIPTIONKILOMETERS X 1000
8 16 24 32 40 48 56 64 72 80 88 96 104 112 120 128 136 144 152 160
MONTHS 6 12 18 24 30 36 42 48 54 60 66 72 78 84 90 96 102 108 114 120Fuel Tank, Fuel Filler Cap,
Canister, Vapor Hose I I I I I
Fuel Tank Air Filter I I I I I Fuel Filter I I I I I
Fuel Lines, Hoses and Connections I I I I I
Air Cleaner Filter I R I R I R I R I R Brake fluid I I R I I R I I R ISpark plugs Replace every 160,000 km or 84 months
Engine Coolant First, replace 192,000 km or 120 months.
After that, replace every 48,000 km or 24 months

Maintenance
8-16
*1 : If TOP TIER Detergent Gasoline is not available, one bottle of Fuel Injector Cleaner is recommended. Fuel Injector Cleaners are
available from your authorized HYUNDAI dealer along with information on how to use them. Do not mix other Fuel Injector
Cleaners.Maintenance Schedule (Smartstream G2.5 T-GDI)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.
R : Replace A : Add S : Service I : Inspect L : Lubricate r : RotateDESCRIPTION KILOMETERS X 1000
8 16 24 32 40 48 56 64 72 80 88 96 104 112 120 128 136 144 152 160
MONTHS 6 12 18 24 30 36 42 48 54 60 66 72 78 84 90 96 102 108 114 120Engine Oil And Filter
Replacement (Synthetic oil) R R R R R R R R R R R R R R R R R R R R
Steering gear box, linkage and
boots I I I I I I I I I I I I I I I I I I I I
Drive shafts and boots I I I I I I I I I I I I I I I I I I I I
Vacuum Hose I I I I I I I I I I I I I I I I I I I I
All Latch, Hinges and Locks L L L L L L L L L L L L L L L L L L L L
Rotate tire or perform seasonal
tire change r r r r r r r r r r
Fuel Injector Cleaner * 1
A A A A A A A A A A

Maintenance
8-18
Maintenance Schedule (Smartstream G2.5 T-GDI) (CONT)R : Replace A : Add S : Service I : Inspect L : Lubricate r : RotateDESCRIPTIONKILOMETERS X 1000
8 16 24 32 40 48 56 64 72 80 88 96 104 112 120 128 136 144 152 160
MONTHS 6 12 18 24 30 36 42 48 54 60 66 72 78 84 90 96 102 108 114 120Fuel Tank, Fuel Filler Cap,
Canister, Vapor Hose I I I I I
Fuel Tank Air Filter I I I I I Fuel Filter I I I I I
Fuel Lines, Hoses and Connections I I I I I
Air Cleaner Filter I R I R I R I R I R Brake fluid I I R I I R I I R ISpark plugs Replace every 160,000 km or 84 months
Engine Coolant First, replace 192,000 km or 120 months.
After that, replace every 48,000 km or 24 months