2003 Hyundai Sonata Owner's Manual

4- 4 CORROSION PREVENTION AND APPEARANCE CARE
E040B01A-AATTo Clean the Leather Upholstery
(If installed)
In the normal course of use, leather upholstered
surfaces will, like any material, pick-up dust and
dirt. This dust and dirt must be cleaned off or it
may work into the surface of the leather, caus-
ing damage.
Fine leather needs care, and should be cleaned
when necessary. Washing leather thoroughly
with soap and water will keep your leather
lustrous, beautiful and ensure you have many
years of wear.
E040A01A-AATCLEANING THE INTERIOR
To Clean the Vinyl Upholstery
To clean the vinyl upholstery, first remove loose
dirt and dust with a vacuum cleaner. Then apply
a solution of mild soap or detergent and water
using a clean sponge or soft cloth. Allow this to
stay on the surface to loosen the dirt, then wipe
with a clean damp sponge or cloth. If all the dirt
stains are not removed, repeat this procedure
until the upholstery is clean. Do not use gaso-
line, solvent, paint thinner or other strong clean-
ers.
E030E01A-AATMaintaining Bumpers
Special precautions must be observed to pre-
serve the appearance of the bumpers on your
Hyundai. They are:
o Be careful not to spill battery electrolyte or
hydraulic brake fluid on the bumpers. If you
do, wash it off immediately with clear water.
o Be gentle when cleaning the bumper sur-
faces. They are made of soft plastic and the
surface can be damaged if mistreated. Do
not use abrasive cleaners. Use warm water
and mild soap or car-washing solution.
o Do not expose the bumpers to high tem-
peratures. For example, if you have your car
repainted, do not leave the bumpers on the
car if the car is going to be placed in a high-
temperature paint booth.
E030D01A-AATWhen to Wax Again
You should polish and wax the car again when
water no longer beads on a clean surface but
spreads out over a larger area.
E030C01A-AATPolishing and Waxing
Always wash and dry the car before polishing
or waxing or using a combination cleaner and
wax. Use a good quality commercial product
and follow the manufacturer's directions on the
container. Polish and wax the bright trim pieces
as well as the paint.
E030B01A-AAT
Spot Cleaning
Don't use gasoline, strong solvents or corro-
sive cleaning agents. These can damage the
finish of the car. To remove road tar, use
turpentine on a clean, soft cloth. Be gentle.
To remove dead insects or tree sap, use warm
water and mild soap or car-washing solution.
Soak the spot and rub gently. If the paint has lost
its luster, use a commercial car-cleaning polish. underside of the doors are open. Paint damage
can be caused by small accumulation of tar,
industrial precipitation, tree resin, insects and
bird droppings, when not removed immediately.
If water alone is not strong enough to remove the
accumulated dirt, use a mild car washing solu-
tion. Be sure to rinse the surface after washing
to remove the solution. Never allow the solution
to dry on the painted surfaces.

CORROSION PREVENTION AND APPEARANCE CARE 4- 5
Take a piece of cheese cloth and using any mild
soap and lukewarm water, work up a good
lather. Thoroughly wash the leather. Wipe clean
with a slightly damp cloth and dry with soft cloth.
Do this as often as the leather becomes
soiled.
During tanning operations, sufficient oils are
incorporated through processing that none need
be applied during the life of the leather. Oil
applied to the finished surface will in no way help
the leather and may do more harm than good.
Varnishes and furniture polishes should never
be used under any conditions.E040D01A-AATCleaning the Seat Belts
To clean the seat belts, use a cloth or sponge
with mild soap or detergent and warm water. Do
not use strong detergents, dye, bleach or abra-
sive materials on the seat belts as this may
weaken the fabric.
While cleaning the belts, inspect them for ex-
cessive wear, cuts, fraying or other signs of
damage and replace them if necessary.
E040C01A-AATCleaning the Carpets
Use a foam-type carpet cleaner. Cleaners of
this type are available in aerosol cans in liquid
form or powder. Read the instructions and
follow them exactly. Using a vacuum cleaner
with the appropriate attachment, remove as
much dirt from the carpets as possible. Apply
the foam following the manufacturer's direc-
tions, then rub in overlapping circles. Do not add
water. These cleaners work best when the
carpet is kept as dry as possible.
E050A01A-AATAny Questions?
If you have any questions about the care of your
car, consult your Hyundai dealer.
E040E01A-AATCleaning the Windows
You may use any household window cleaner on
the windows. However, when cleaning the in-
side of the rear window be careful not to damage
the rear window defroster wiring.

5. VEHICLE MAINTENANCE
REQUIREMENTS
Maintenance intervals ...................................................................... 5-2
Scheduled maintenance ................................................................... 5-4
Maintenance under severe usage conditions ................................... 5-6
Explanation of scheduled maintenance items .................................. 5-7
5

5- 2 VEHICLE MAINTENANCE REQUIREMENTS
F010D01A-AATGeneral Checks
These are the regular checks you should per-
form when you drive your Hyundai or you fill the
fuel tank. A list of these items will be found on
page 6-4.
F010C01A-AATSpecified Scheduled Procedures
These are the procedures such as inspections,
adjustments and replacements that are listed in
the maintenance charts starting on page 5-4.
These procedures must be performed at the
intervals shown in the maintenance schedule to
assure that your warranty remains in effect.
Although it is strongly recommended that they
be performed by the trained technicians at your
Hyundai dealer, these procedures may be per-
formed at any qualified service facility.
It is suggested that genuine Hyundai service
parts be used for any required repairs or re-
placements. Other parts of equivalent quality
such as engine oil, engine coolant, manual or
auto transaxle oil, brake fluid and so on which
are not supplied by Hyundai Motor Company or
its distributor may be used without affecting
your warranty coverage but you should always
be sure these are equivalent to the quality of the
original Hyundai parts. Your Owner's Hand-
book provides further information about your
warranty coverage.
F010A01A-AATMAINTENANCE INTERVALS
Service Requirements
To ensure that you receive the greatest number
of miles of satisfying operation from your Hyundai,
certain maintenance procedures must be per-
formed. Although careful design and engineer-
ing have reduced these to a minimum, those that
are required are of the utmost importance.
It is your responsibility to have these mainte-
nance procedures performed to comply with
the terms of the warranties covering your new
Hyundai. The Owner's Handbook supplied with
your new vehicle provides further information
about these warranties.
F010B01A-AATMaintenance Requirements
The maintenance required for your Hyundai
can be divided into three main areas:
o Specified scheduled procedures
o General checks
o Do-it-yourself maintenance
F010E01A-AATDo-It-Yourself Maintenance
If you are mechanically inclined, own a few tools
that are required and want to take the time to do
so, you can inspect and service a number of
items. For more information about doing it your-
self, see Section 6.
F010F01A-AATA Few Tips
o Whenever you have your Hyundai serviced,
keep copies of the service records in your
glovebox. This will help ensure that you can
document that the required procedures have
been performed to keep your warranties in
effect. This is especially important when
service is not performed by an authorized
Hyundai dealer.
o If you choose to do your own maintenance
and repairs, you may find it helpful to have
an official Hyundai Shop Manual. A copy of
this publication may be purchased at your
Hyundai dealer's parts department.

VEHICLE MAINTENANCE REQUIREMENTS 5- 3
F020A02Y-AATSCHEDULED MAINTENANCE
REQUIREMENTS
o Inspection should be performed any time a
malfunction is experienced or suspected.
o Receipts for all emission control system
services should be retained to demonstrate
compliance with conditions of the emissions
system warranty.
o After 120 months or 150,000 miles (240,000
km), continue to follow the prescribed main-
tenance intervals.
o For severe usage maintenance require-
ments, see page 5-6 of this section.
F020A02Y-AAT
SCHEDULED MAINTENANCE
REQUIREMENTS
o Inspection should be performed any time a
malfunction is experienced or suspected.
o Receipts for all emission control system
services should be retained to demonstrate
compliance with conditions of the emissions
system warranty.
o After 120 months or 150,000 miles (240,000
km), continue to follow the prescribed main-
tenance intervals.
o For severe usage maintenance require-
ments, see page 5-6 of this section.

5- 4 VEHICLE MAINTENANCE REQUIREMENTS
F030A01A-AATSCHEDULED MAINTENANCE
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.
DESCRIPTION
EMISSION CONTROL ITEMS
ENGINE OIL AND FILTER
FUEL FILTER
FUEL LINES, FUEL HOSES AND CONNECTIONS
VACUUM AND CRANKCASE VENTILATION HOSES
VAPOR HOSE AND FUEL FILLER CAP
AIR CLEANER FILTER
SPARK PLUGS (PLATINUM COATED) No.
1
2
3
4
5
6
7MILES X 1000
KILOMETERS X 1000
MONTHS7.5
12
6
R15
24
12
R22.5
36
18
R30
48
24
R
I
I
R37.5
60
30
R45
72
36
R52.5
84
42
R
R
I60
96
48
R
I
I
R
R67.5
108
54
R75
120
60
R82.5
132
66
R90
144
72
R
I
I
R97.5
156
78
R105
168
84
R
R
I112.5
180
90
R120
192
96
R
I
I
R
R127.5
204
102
R135
216
108
R142.5
228
114
R150
240
120
R
I
I
R
F030B02Y-AATR :Replace I : Inspect and, after Inspection, clean, adjust, repair or replace if necessary.

VEHICLE MAINTENANCE REQUIREMENTS 5- 5
Note :
*1. FOR CALIFORNIA, THIS MAINTENANCE IS RECOMMENDED, BUT NOT REQUIRED.
*2. FOR EVERY 12 MONTHS OR 12,000 MILES (20,000 KM), WHICHEVER OCCURS FIRST : "R"
F030C07Y-AAT
R : Replace I : Inspect and, after inspection, clean, adjust, repair or replace if necessary
GENERAL ITEMS
DRIVE BELT
COOLANT
TIMING BELT
MANUAL TRANSAXLE OIL
AUTOMATIC TRANSAXLE FLUID AND FILTER
BRAKE FLUID
BRAKE HOSES AND LINES
REAR BRAKE DRUMS/LININGS, PARKING BRAKE
BRAKE PADS, CALIPERS AND ROTORS
EXHAUST PIPE AND MUFFLER
SUSPENSION MOUNTING BOLTS
STEERING GEAR BOX, LINKAGE & BOOTS/LOWER ARM
BALL JOINT, UPPER ARM BALL JOINT
POWER STEERING PUMP AND HOSES
DRIVESHAFTS AND BOOTS
AIR CONDITIONING REFRIGERANT
AIR FILTER (For Evaporator and Blower unit) 1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16 No. DESCRIPTIONMILES X 1000
KILOMETERS X 1000
MONTHS
2.4DOHC (ALT, W/PUMP)
2.7V6 ( ALT, P/STR'G, A/CON)7.5
12
6
I15
24
12
I
I
I
I
I
I
I
I
I22.5
36
18
I30
48
24
I
I
R
I
I
I
I
I
I
I
I
I
I
I
I
I37.5
60
30
I45
72
36
I
I
I
I
I
I
I
I
I52.5
84
42
I60
96
48
R
I
R
R*¹
I
I
I
I
I
I
I
I
I
I
I
I67.5
108
54
I75
120
60
R
I
I
I
I
I
I
I
I82.5
132
66
I90
144
72
I
I
R
I
I
I
I
I
I
I
I
I
I
I
I
I97.5
156
78
I105
168
84
I
R
I
I
I
I
I
I
I112.5
180
90
I120
192
96
R
I
R
R*¹
I
I
I
I
I
I
I
I
I
I
I
I127.5
204
102
I135
216
108
I
I
I
I
I
I
I
I
I142.5
228
114
I150
240
120
I
R
R
I
I
I
I
I
I
I
I
I
I
I
I
I
See Note *
2

5- 6 VEHICLE MAINTENANCE REQUIREMENTS
SEVERE DRIVING CONDITIONSA - Repeated short distance driving
B - Extensive idling
C - Driving in dusty, rough roads
D - Driving in areas using salt or other corrosive materials or in
very cold weather
E - Driving in sandy areas
F040A04Y-AATMAINTENANCE UNDER SEVERE USAGE CONDITIONS
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 I : Inspect and, after inspection, clean, adjust, repair or replace if necessary
F - More than 50% driving in heavy city traffic during hot weather
above 90°F (32°C)
G - Driving in mountainous areas
H - Towing a trailer
I - Driving for patrol car, taxi or commercial car and vehicle towing
J - Driving over 100 mph ENGINE OIL AND FILTER
AIR CLEANER FILTER
SPARK PLUGS
BRAKE PADS, CALIPERS AND ROTORS
REAR BRAKE DRUMS/LININGS,
PARKING BRAKE
STEERING GEAR BOX, LINKAGE & BOOTS/
LOWER ARM BALL JOINT, UPPER ARM BALL JOINT
DRIVESHAFTS AND BOOTS
MANUAL TRANSAXLE OIL
AUTOMATIC TRANSAXLE FLUID AND FILTER
AIR FILTER (FOR EVAP. AND BLOWER UNIT)
MAINTENANCE ITEM
R
R
R
I
I
I
I
R
R
RVERY 3,000 MILES (4,800 KM) OR 3 MONTHS
MORE FREQUENTLY
MORE FREQUENTLY
MORE FREQUENTLY
MORE FREQUENTLY
MORE FREQUENTLY
EVERY 7,500 MILES (12,000 KM) OR 6 MONTHS
EVERY 60,000 MILES (96,000 KM)
EVERY 30,000 MILES (48,000 KM)
MORE FREQUENTLY
DRIVING
CONDITION MAINTENANCE
INTERVALS MAINTENANCE
OPERATION
A, B, C, F, H
C, E
B, H
C, D, G, H
C, D, G, H
C, D, E, F, G
C, E, F
A, C, D, E, F, G, H, I, J
A, C, E, F, G, H, I
C, E