2003 Hyundai Sonata maintenance schedule

6- 6 DO-IT-YOURSELF MAINTENANCE
!WARNING:Be very careful when draining the engine oil
as it may be hot enough to burn you!
G040A02A-AATCHANGING THE OIL AND FILTERG030D01A-AATAdding Oil
If the oil level is close to or below the "L" mark,
add oil until it reaches the "F" mark. To add oil:
1. Remove the oil filler cap by turning it counter-
clockwise.
2. Add oil, then check the level again. Do not
overfill.
3. Replace the cap by turning it clockwise.
The distance between the "F" and "L" marks is
equal to about 1 quart of oil.The engine oil and filter should be changed at
those intervals specified in the maintenance
schedule in Section 5. If the car is being driven
in severe conditions, more frequent oil and filter
changes are required.
The procedure for changing the oil and filter is
as follows:
1. Park the car on level ground and set the
parking brake. Start the engine and let it
warm up until the needle on the coolant
temperature gauge moves above the lowest
mark. Turn the engine off and place the gear
selector lever in "P" (automatic) or reverse
gear (manual transaxle). Set the parking
brake.
2. Open the hood and remove the engine oil
filler cap.
3. Slide underneath the car and loosen the
drain plug by turning it counterclockwise with
a wrench of the proper size. Be sure that a
drain pan is in position to catch the oil as it
drains out, then remove the drain plug.
G030D01Y
HSM394
DOHC V6DOHC V6

6- 8 DO-IT-YOURSELF MAINTENANCE
G050D02A-AATTo Change the Engine CoolantThe engine coolant should be changed at those
intervals specified in the vehicle maintenance
schedule in Section 5.
CAUTION:Engine coolant can damage the finish of
your car. If you spill engine coolant on the
car, wash it off thoroughly with clean water.
1. Park the car on level ground, set the park-
ing brake and remove the radiator cap when
cool.
2. Be sure your drain receptacle is in place.
Open the drain cock on the radiator. Allow all
the engine coolant to drain from the cooling
system, then securely close the drain cock.
3. Check Section 9 for the capacity of the
cooling system in your car. Then, following
the manufacturer's directions on the engine
coolant container, add the appropriate quan-
tity of coolant to the radiator.
G050C01A-AAT
To Check the Coolant LevelThe coolant level can be seen on the side of the
plastic coolant reservoir. The level of the cool-
ant should be between the "L" and "F" lines on
the reservoir when the engine is cool. If the level
is below the "L" mark, add engine coolant to
bring it up between "L" and "F". If the level is low,
inspect for coolant leaks and recheck the fluid
level frequently. If the level drops again, visit
your Hyundai dealer for an inspection and
diagnosis of the reason.Ambient
temperature
°C ( °F)
-15 (5)
-25 (-13)
-35 (-31)
-45 (-49)
65%
60%
50%
40% 35%
40%
50%
60%Water Antifreeze
solution Engine Coolant concentration
G050B01A-AATRecommended Engine Coolant
Use a high quality ethylene-glycol coolant in a
50/50 mix with water. The engine coolant should
be compatible with aluminum engine parts.
Additional corrosion inhibitors or additives should
not be used. The cooling system must be
maintained with the correct concentration and
type of engine coolant to prevent freezing and
corrosion. Never allow the concentration of
antifreeze to exceed the 60% level or go below
the 35% level, or damage to the cooling system
may result. For proper concentration when
adding or replacing the engine coolant, refer to
the following table.
G050B01Y

DO-IT-YOURSELF MAINTENANCE 6- 9
!
4. Turn the radiator cap counterclockwise with-
out pressing down on it, until it stops. This
relieves any pressure remaining in the cool-
ing system. And remove the radiator cap by
pushing down and turning counterclock-
wise.
Now fill the radiator with clean demineralized
or distilled water. Continue to add clean
demineralized or distilled water in small quan-
tities until the fluid level stays up in the
radiator neck.
5. Start the engine, top off the radiator with
water and then add coolant to the reservoir
until the level is between "L" and "F".
6. Replace the radiator and reservoir caps and
check to be sure the drain cocks are fully
closed and not leaking.G060A02Y-AATSPARK PLUGS
Your engine was originally equipped with plati-
num-tipped spark plugs.
Platinum-tipped spark plugs will last longer than
conventional type spark plugs and can be
identified by blue lines on the ceramic shell.
NOTE:Do not clean or regap platinum-tipped spark
plugs.
WARNING:The cooling fan is controlled by engine
coolant temperature and may sometimes
operate even when the engine is not run-
ning. Use extreme caution when working
near the blades of the coolant fan so that
you are not injured by a rotating fan blade.
As the engine coolant temperature de-
creases, the fan will automatically shut off.
This is a normal condition.
HSM392G060B04Y-AAT
Replacing the Spark PlugsThe spark plugs should be changed at the
intervals specified in the vehicle maintenance
schedule in Section 5 or whenever engine
performance indicates they should be changed.
Symptoms that suggest poor spark plug perfor-
mance include engine misfiring under load, loss
of fuel economy, poor acceleration, etc. When
spark plugs are replaced, always use spark
plugs recommended by Hyundai. The use of
other spark plugs can result in loss of perfor-
mance, radio interference or engine damage.
NOTE:When replacing the spark plugs, always use
the genuine parts recommended.
Recommended Spark Plugs:
Type
RN10PYP4 (CHAMPION)
PGR5C-11 (NGK)
RC10PYB4 (CHAMPION)
PFR5N-11 (NGK)Remark
For 2.4L only
For 2.7L only
DOHC V6
0.1~1.1 mm 0.1~1.1 mm

6- 12 DO-IT-YOURSELF MAINTENANCE
!
G110B03A-AAT
Recommended Fluid
Your Hyundai automatic transaxle is specially
designed to operate with HYUNDAI GENUINE
ATF or DIAMOND ATF SP-III or SK ATF SP-III.
Damage caused by a nonspecified fluid is not
covered by your new vehicle limited warranty.
G110A01A-AAT
CHECKING THE TRANSAXLE FLUID
(AUTOMATIC)
Transaxle fluid in the automatic transaxle should
be checked at those intervals specified in the
vehicle maintenance schedule in Section 5.
G100B02A-AATTo Check the Manual Transaxle Fluid
Level
G100A03Y-AATCHECKING THE TRANSAXLE OIL
(MANUAL)
Transaxle lubricant in the manual transaxle
should be checked at those intervals specified
in the vehicle maintenance schedule in Section
5.
Recommended Oil
Use only HYUNDAI GENUINE PARTS MTF
75W/90 (API GL-4) or equivalent in the manual
transaxle.
Manual Transaxle Oil Capacity
The oil capacity of the manual transaxle is 2.2
U.S. quarts (2.1 liters).Park the car on level ground with the engine off.
1. Using a wrench of the correct size, loosen
the oil filler plug by turning it counterclock-
wise and remove it with your fingers.2. Use your finger or suitable tool to feel inside
the hole. The oil level should be at its bottom
edge. If it is not, check for leaks before
adding oil. To refill the transaxle or bring the
oil level up,add oil slowly until it reaches the
proper level. Do not overfill.
3. Replace the plug and washer, screw it in with
your fingers and then tighten securely with
the wrench.
WARNING:It is always better to check the transaxle oil
level when the engine is cool or cold. If the
engine is hot, you should exercise great
caution to avoid burning yourself on hot
engine or exhaust parts.
G100A03Y
SSA6100B
Filler plug
Drain plug

6- 14 DO-IT-YOURSELF MAINTENANCE
!
!
G120E02A-AATAdding Brake Fluid
G120D01A-AATTo Check the Fluid Level
The fluid level in the brake fluid reservoir should
be checked periodically. The level should be
between the "MIN" and "MAX" marks on the side
of the reservoir. If the level is at or below the
"MIN" mark, carefully add fluid to bring it up to
"MAX". Do not overfill.
G120C02A-AATRecommended Brake Fluid
Use only hydraulic brake fluid conforming to
DOT 3 or DOT 4 specifications in your braking
system. Follow the instructions printed on the
container.
G120B01A-AATChecking the Brake Fluid Level
G120A01A-AATCHECKING THE BRAKES
WARNING:
The cooling fan is controlled by engine
coolant temperature and may sometimes
operate even when the engine is not run-
ning. Use extreme caution when working
near the blades of the cooling fan, so that
you are not injured by a rotating fan blade.
As the engine coolant temperature de-
creases, the fan will automatically shut off.
This is a normal condition.
CAUTION:Because brakes are essential to the safe
operation of the car, it is suggested that
they be checked and inspected by your
Hyundai dealer. The brakes should be
checked and inspected for wear at those
intervals specified in the vehicle mainte-
nance schedule in Section 5.
!
WARNING:Use caution when handling brake fluid. It
can damage your vision if it gets into your
eyes. It will also damage your vehicle's
paint if spilled on it and not removed imme-
diately.
!
HKSOM120
HEF-234
Fluid level should be within "HOT" range

7- 2 EMISSION CONTROL SYSTEMS
H010E01Y-AATEGR System (If installed)
This system helps reduce nitrogen oxides by
recirculating a part of the exhaust gas into the
engine, thereby reducing cylinder combustion
temperature, which results in lower output of
oxides of nitrogen.
H010D01A-AAT3. Exhaust Emission Control System
The Exhaust Emission Control System is a
highly effective system which controls exhaust
emissions while maintaining good vehicle
performace.
H010B01A-AAT1. Crankcase Emission Control
System
The positive crankcase ventilation system is
employed to prevent air pollution caused by
blow-by gases being emitted from the crank-
case. This system supplies filtered air to the
crankcase through the air intake hose. Inside
the crankcase, the fresh air mixes with blow-by
gases, which then pass through the PCV valve
and into the induction system.
H010A01L-AATEMISSION CONTROL SYSTEM
Your Hyundai is equipped with an emission
control system to meet all requirements of the
U.S. Environmental Protection Agency or Cali-
fornia Air Resources Board.
There are three emission control systems which
are as follows.
(1) Crankcase emission control system
(2) Evaporative emission control system
(3) Exhaust emission control system
In order to assure the proper function of the
emission control systems, it is recommended
that you have your car inspected and main-
tained by an authorized Hyundai dealer in ac-
cordance with the maintenance schedule in this
manual.
Caution for Inspection and Maintenance
Test (2.7 V6 Vehicle with Traction Control
System)
o To prevent the vehicle from misfiring
during dynamometer testing, discon-
nect the ABS connector located on the
left side of the engine compartment.
o For more information, see shop manual
(BR-67, Wheel Speed Sensor)
H010C02S-AAT
2. Evaporative Emission Control
(Including ORVR: Onboard Refueling
Vapor Recovery) System
The Evaporative Emission Control System is
designed to prevent fuel vapors from escaping
into the atmosphere.
(The ORVR system is designed to allow the
vapors from the fuel tank to be loaded into a
canister while refueling at the gas station, pre-
venting the escape of fuel vapors into the
atmosphere.)
Canister
Fuel vapors generated inside the fuel tank are
absorbed and stored in the onboard canister.
When the engine is running, the fuel vapors
absorbed in the canister are drawn into the
surge tank through the purge control solenoid
valve.
Purge Control Solenoid Valve (PCSV)
The purge control solenoid valve is controlled
by the Engine Control Module (ECM); when the
engine coolant temperature is low during idling,
the PCSV closes so that evaporated fuel is not
taken into the engine. After the engine warms-
up during ordinary driving, the PCSV opens to
introduce evaporated fuel to the engine.

10- 4 INDEX
K
Key ..................................................................................................... 1-3
If you lose your keys ...................................................................3-11
Positions......................................................................................... 2-3
M
Maintenance Intervals
Explanation of scheduled maintenance items ............................... 5-7
Maintenance under severe usage conditions ............................... 5-6
Scheduled maintenance ................................................................ 5-4
Service requirements .................................................................... 5-2
Map lamp ...........................................................................................1-49
Mirrors
Day-night inside rearview ............................................................1-52
Outside rear view .........................................................................1-50
O
Odometer..........................................................................................1-39
Outside rear view mirror heater .......................................................1-51
P
Parking Brake ....................................................................................1-56
Passenger Presense Detection .......................................................1-31
Power Driver seat .............................................................................1-13
Power Outlet ......................................................................................1-61
Power Steering Fluid Level ...............................................................6-20R
Radio (H240, H260, H290) ........................................... 1-80, 1-85, 1-90
Rear Seat
Fold down .....................................................................................1-15
Rear View mirror ...............................................................................1-52
Rear Window Defroster Switch ........................................................1-44
Reporting Safety Defects ................................................................... 8-7
S
Seat
Front.............................................................................................1-10
Seat Belts
3-Point system .............................................................................1-18
Adjusting your seat belt ...............................................................1-20
Care of seat belts .........................................................................1-17
Precautions..................................................................................1-16
Shop Manual ........................................................................................ 8-5
Spark Plugs ......................................................................................... 6-9
Speedometer.....................................................................................1-38
Starting Procedure .............................................................................. 2-4
Steering Wheel
Free play ......................................................................................6-16
Steering Wheel Tilt Lever ..................................................................1-61
Stereo Radio Operation (H240, H260, H290) .............. 1-80, 1-85, 1-90
Stereo Sound System .......................................................................1-78
Sun Visor ...........................................................................................1-60
Sunroof..............................................................................................1-47

Seoul KoreaPrinting: FEB. 10, 2002
Publication No.: A38O-EU32I
Printed in Korea
SERVICE STATION INFORMATION
FUEL:
UNLEADED gasoline only
Pump Octane Rating of 87 (Research Octane Number 91) or higher.
FUEL TANK CAPACITY
US.gal (Imp.gal., liter) 17.2 (14.3, 65)
TIRE PRESSURE:
See the label on the driver's side of the center pillar outer panel.
OTHER TIRE INFORMATION:
See pages 8-2 through 8-6
HOOD RELEASE:
Pull handle under left side of dash.
ENGINE OIL:
API grade SH, SG or SG/CD multigrade and fuel efficient oil. Use SAE
10W-30, 10W-40 or 10W-50 if normal temperatures are above -10°F
(-23°C). For other viscosity recommendations, see page 6-5 or 9-4.
MANUAL TRANSAXLE:
HYUNDAI GENUINE PARTS MTF 75W/90 (API GL-4) Oil level
should be up to filler-bolt hole in housing beside differential.
AUTOMATIC TRANSAXLE:
Apply the parking brake, with the engine running, shift the selector
lever through all ranges and return to “N” (Neutral) position. Then
check the level of fluid on the dipstick. Use only HYUNDAI GENU-
INE ATF available at your dealer or DIAMOND ATF SP-III or SK
ATF SP-III.
QUICK INDEX
o Car will not start ....................................................................... 3-2
o Flat tire ..................................................................................... 3-5
o Warning light/chime comes on .............................................. 1-35
o Engine overheats ...................................................................... 3-3
o Towing of your vehicle ............................................................. 3-9
o Starting the engine ................................................................... 2-3
o Driving tips for first 1,200 miles (2,000 km) .......................... 1-3
o Scheduled maintenance ............................................................ 5-4
o Reporting safety defects ........................................................... 8-7