2020 Hyundai Sonata air filter

05
5-125
Air conditioning system operation tips
• If the vehicle has been parked in dir
ect sunlight during hot weather,
open the windows for a short time
to let the hot air inside the vehicle
escape.
• After sufficient cooling has been achieved, switch back from the
recirculated air to the fresh outside air
position.
• To help reduce moisture inside of the windows on rainy or humid
days, decrease the humidity inside
the vehicle by operating the air
conditioning system with the windows
and sunroof closed.
• Use the air conditioning system every month only for a few minutes
to ensure maximum system
performance.
• If you operate air conditioner excessively, the difference between
the temperature of the outside air and
that of the windshield could cause
the outer surface of the windshield
to fog up, causing loss of visibility. In
this case, set the mode selection knob
or button to the
position and fan
speed control to the lower speed.
System Maintenance
Cabin air filter
OIK047401LOIK047401L[A] : Outside air, [B] : Recirculated air
[C] : Cabin air filter, [D] : Blower
[E] : Evaporator core, [F] : Heater core
The cabin air filter is installed behind
the glove box. It filters the dust or other
pollutants that enter the vehicle through
the heating and air conditioning system.
Have the cabin air filter replaced by an
authorized HYUNDAI dealer according to
the maintenance schedule. If the vehicle
is being driven in severe conditions such
as dusty or rough roads, more frequent
cabin air filter inspections and changes
are required.
If the air flow rate suddenly decreases,
the system should be checked at an
authorized HYUNDAI dealer.
Checking the amount of air
conditioner refrigerant and
compressor lubricant
When the amount of refrigerant is low,
the performance of the air conditioning
is reduced. Overfilling also reduces the
performance of the air conditioning
system.
Therefore, if abnormal operation is
found, have the system inspected by an
authorized HYUNDAI dealer.

Convenient Features5-136
Air conditioning system operation tips
• If the vehicle has been parked in dir
ect sunlight during hot weather,
open the windows for a short time
to let the hot air inside the vehicle
escape.
• After sufficient cooling has been achieved, switch back from the
recirculated air to the fresh outside air
position.
• To help reduce moisture inside of the windows on rainy or humid
days, decrease the humidity inside
the vehicle by operating the air
conditioning system with the windows
and sunroof closed.
• Use the air conditioning system every month only for a few minutes
to ensure maximum system
performance.
• If you operate air conditioner excessively, the difference between
the temperature of the outside air and
that of the windshield could cause
the outer surface of the windshield
to fog up, causing loss of visibility. In
this case, set the mode selection knob
or button to the
position and fan
speed control to the lower speed.
System Maintenance
Cabin air filter
OIK047401LOIK047401L[A] : Outside air, [B] : Recirculated air
[C] : Cabin air filter, [D] : Blower
[E] : Evaporator core, [F] : Heater core
The cabin air filter is installed behind
the glove box. It filters the dust or other
pollutants that enter the vehicle through
the heating and air conditioning system.
Have the cabin air filter replaced by an
authorized HYUNDAI dealer according to
the maintenance schedule. If the vehicle
is being driven in severe conditions such
as dusty or rough roads, more frequent
cabin air filter inspections and changes
are required.
If the air flow rate suddenly decreases,
the system should be checked at an
authorized HYUNDAI dealer.

Engine Compartment ........................................................................\
............ 8-3
Maintenance Services ........................................................................\
...........8-4
Owner’s Responsibility ........................................................................\
.................... 8-4
Owner Maintenance Precautions ........................................................................\
.... 8-4
Owner Maintenance ........................................................................\
.............. 8-5Owner Maintenance Schedule ........................................................................\
........ 8-5
Scheduled Maintenance Services ................................................................ 8-7Normal Maintenance Schedule (Smartstream G1.6 T-GDi) ...................................8-8
Maintenance Under Severe Usage Conditions (Smartstream G1.6 T-GDi) ......... 8-11
Severe Driving Conditions ........................................................................\
.............. 8-11
Normal Maintenance Schedule (Smartstream G2.5 GDi) ..................................... 8-12
Maintenance Under Severe Usage Conditions (Smartstream G2.5 GDi) ................8-15
Severe Driving Conditions ........................................................................\
..............8-15
Explanation of Scheduled Maintenance Items .......................................... 8-16
Engine Oil ........................................................................\
............................. 8-19
Checking the Engine Oil Level ........................................................................\
........8-19
Checking the Engine Oil and Filter ....................................................................... 8-20
Engine Coolant ........................................................................\
......................8-21Checking the Engine Coolant Level ....................................................................... 8-21
Engine Coolant ........................................................................\
................................ 8-21
Changing Engine Coolant ........................................................................\
.............. 8-23
Brake fluid ........................................................................\
............................ 8-24Checking the Brake Fluid Level ........................................................................\
..... 8-24
Washer Fluid ........................................................................\
......................... 8-25Checking the Washer Fluid Level ........................................................................\
.. 8-25
Air Cleaner ........................................................................\
............................ 8-26Filter Replacement ........................................................................\
......................... 8-26
Climate Control Air Filter ........................................................................\
..... 8-28
Filter Inspection........................................................................\
.............................. 8-28
Filter Replacement ........................................................................\
......................... 8-28
Wiper Blades ........................................................................\
........................ 8-29Blade Inspection ........................................................................\
............................ 8-29
Blade Replacement ........................................................................\
........................ 8-29
Battery ....................................................................\
.......................................8-31For Best Battery Service ........................................................................\
................ 8-32
Battery Recharging ........................................................................\
........................ 8-32
Reset Features ........................................................................\
................................ 8-33
8. Maintenance
8

Maintenance8-8
Normal Maintenance Schedule (Smartstream G1.6 T-GDi)
MAINTENANCE INTERVALS
MAINTENANCE
ITEM Months 12 24 36 48 60 72 84 96 108 120 132 144 156 168 180
Miles×1,000 6 12 18 24 30 36 42 48 54 60 66 72 78 84 90 Km×1,000 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150
Drive belts
*1
At first, inspect at 60,000 miles or 72 months.
Thereafter, inspect every 12,000 miles or 24 months
Engine oil and engine oil filter R R R R R R R R R RRRRR R
Fuel additives
*2
Add fuel additives every 6,000 miles or 12 months
Air cleaner filter I I I R I I I R I I I R I I I
Spark plugs Replace every 42,000 miles
Valve clearance
*3
Inspect every 60,000 miles or 72 months
Rotate tires Rotate tires every 6,000 miles
Climate control air filter Replace every 12 months
Vacuum hose I I I I I I I I I IIIII I
Engine coolant At first, replace at 120,000 miles or 120 months.
Thereafter, replace every 30,000 miles or 24 months
R: Replace or change.
I : Inspect and if necessary, adjust, correct, clean or replace.*1 :
The drive belt should be replaced when cracks occur or tension is reduced excessively.
*2 :
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.
*3 :
Inspect for excessive valve noise and/or engine vibration and adjust if necessary. Have an authorized HYUNDAI dealer perform
the operation.

Maintenance8-10
Normal Maintenance Schedule (Smartstream G1.6 T-GDi) (CONT)
MAINTENANCE INTERVALS
MAINTENANCE
ITEM Months 12 24 36 48 60 72 84 96 108 120 132 144 156 168 180
Miles×1,000 6 12 18 24 30 36 42 48 54 60 66 72 78 84 90 Km×1,000 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150
Intercooler, in/out hose, air intake hose I I I I I I I I IIIIII I
Steering gear rack, linkage and boots I I I I I I I I IIIIII I
Vapor hose, fuel filler cap and fuel tank IIII I I I
Fuel tank air filter *
4
IIII I I I
Fuel filter *
4
IIII I I I
Fuel lines, hoses and connections I I I
Parking brake IIII I I I
Brake fluid IIII I I I
R: Replace or change.
I : Inspect and if necessary, adjust, correct, clean or replace.*4 : Fuel filter & Fuel tank air filter are considered to be maintenance free but periodic inspection is recommended for this
maintenance schedule depends on fuel quality. If there are some important safety matters like fuel flow restriction, surging,
loss of power, hard starting problem, etc. replace the fuel filter immediately regardless of maintenance schedule and consult an
authorized HYUNDAI dealer for details

08
8-11
Maintenance Under Severe Usage Conditions (Smartstream G1.6 T-GDi)
The following items must be serviced more frequently on cars normally used under
severe driving conditions. Refer to the chart below for the appropriate maintenance
intervals.
R: Replace or change.
I : Inspect and if necessary, adjust, correct, clean or replace.
MAINTENANCE ITEMMAINTENANCE
OPERATION MAINTENANCE
INTERVALS DRIVING
CONDITION
Engine oil and filter RE
very 3,000 miles or
6 months A, B, C, D, E,
F, G, H, I, J, K
Air cleaner filter RMore frequently C, E
Spark plugs RMore frequently A, B, H, I, K
Automatic transmission fluid
(if equipped) R Every 60,000 miles A, C, E, F, G, I
Front brake disc/pads, calipers IMore frequently C, D, G, H
Rear brake shoes or disc/pads IMore frequently C, D, G, F
Parking brake IMore frequently C, D, G, H
Steering gear box, linkage &
boots/ lower arm ball joint,
upper arm ball joint I
More frequently C, D, E, F, G,
H, I
Suspension mounting bolts IMore frequently C, D, E, F, G,
H, I
Drive shafts and boots IEvery 3,000 miles or
6 months C, D, E, F, G,
H, I
Climate control air filter
(for evaporator and blower unit) R
More frequently C, E
Severe Driving Conditions
A. Repeatedly driving short distances
of less than 5 miles (8 km) in normal
temperature or less than 10 miles (16
km) in freezing temperature
B. Extensive engine idling or low speed driving for long distances
C. Driving on rough, dusty, muddy, unpaved, graveled or salt- spread
roads
D. Driving in areas using salt or other corrosive materials or in very cold
weather E. Driving in sandy areas
F. Driving in heavy traffic area over 90°F
(32°C)
G. Driving on uphill, downhill, or mountain road
H. Towing a Trailer, or using a camper, or roof rack
I. Driving as a patrol car, taxi, other commercial use or vehicle towing
J. Driving over 106 mph (170 km/h)
K. Frequently driving in stop-and-go conditions

Maintenance8-12
Normal Maintenance Schedule (Smartstream G2.5 GDi)
MAINTENANCE INTERVALS
MAINTENANCE
ITEM Months 12 24 36 48 60 72 84 96 108 120 132 144 156 168 180
Miles×1,000 7.5 15 22.5 30 37.5 45 52.5 60 67.5 75 82.5 90 97.5 105 112.5 Km×1,000 12 24 36 48 60 72 84 96 108 120 132 144 156 168 180
Drive belts
*1
At first, inspect at 60,000 miles or 72 months.
Thereafter, inspect every 15,000 miles or 24 months
Engine oil and engine oil filter R R R R R R R R R RRRRR R
Fuel additives
*2
Add fuel additives every 7,500 miles or 12 months
Air cleaner filter I I I R I I I R I I I R I I I
Spark plugs Replace every 97,500 miles
Rotate tires Rotate tires every 7,500 miles
Climate control air filter Replace every 12 months
Vacuum hose I I I I I I I I I IIIII I
Engine coolant At first, replace at 120,000 miles or 120 months.
Thereafter, replace every 30,000 miles or 24 months
R: Replace or change.
I : Inspect and if necessary, adjust, correct, clean or replace.*1 :
The drive belt should be replaced when cracks occur or tension is reduced excessively.
*2 :
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.

Maintenance8-14
Normal Maintenance Schedule (Smartstream G2.5 GDi) (CONT)
MAINTENANCE INTERVALS
MAINTENANCE
ITEM Months 12 24 36 48 60 72 84 96 108 120 132 144 156 168 180
Miles×1,000 7.5 15 22.5 30 37.5 45 52.5 60 67.5 75 82.5 90 97.5 105 112.5 Km×1,000 12 24 36 48 60 72 84 96 108 120 132 144 156 168 180
Vapor hose, fuel filler cap and fuel tank IIII I I I
Fuel tank air filter *
3
IIII I I I
Fuel filter *
3
IIII I I I
Fuel lines, hoses and connections I I I
Parking brake IIII I I I
Brake fluid IIII I I I
R: Replace or change.
I : Inspect and if necessary, adjust, correct, clean or replace.*3 : Fuel filter & Fuel tank air filter are considered to be maintenance free but periodic inspection is recommended for this
maintenance schedule depends on fuel quality. If there are some important safety matters like fuel flow restriction, surging,
loss of power, hard starting problem, etc. replace the fuel filter immediately regardless of maintenance schedule and consult an
authorized HYUNDAI dealer for details.