Hyundai Sonata

Maintenance
10
7
NORMAL MAINTENANCE SCHEDULE (CONT.)
I : Inspect and if necessary, adjust, correct, clean or replace.
R : Replace or change.* 8
: Manual transaxle fluid should be changed anytime they have been submerged in water.
Number of months or driving distance, whichever comes first
Months1224364860728496
Km×1,000153045607590105120
Steering gear rack, linkage and bootsIIIIIIII
Driveshaft and bootsIIII
Tyre (pressure & tread wear) IIIIIIII
Front suspension ball jointsIIIIIIII
Bolt and nuts on chassis and bodyIIIIIIII
Air conditioner refrigerant (if equipped)IIIIIIII
Air conditioner compressor (if equipped)IIIIIIII
Climate control air filter (if equipped)RRRRRRRR
Manual transaxle fluid (if equipped) * 8II
Automatic transaxle fluid(if equipped) No check, No service required
Exhaust systemIIII
MAINTENANCE
INTERVALS
MAINTENANCE ITEM

711
Maintenance
MAINTENANCE UNDER SEVERE USAGE CONDITIONS
The following items must be serviced more frequently on cars mainly used under severe driving conditions.
Refer to the chart below for the appropriate maintenance intervals.
R : Replace I : Inspect and if necessary, adjust, correct, clean or replace
Maintenance itemMaintenance operationMaintenance intervalsDriving condition
Engine oil and engine oil filterREvery 7,500 km or 6 months A, B, C, D, E, F, G, H, I, K
Air cleaner filterRReplace more frequently
depending on the conditionC, E
Spark plugs RReplace more frequently
depending on the conditionB, H
Steering gear rack, linkage and bootsIInspect more frequently
depending on the conditionC, D, E, F, G
Front suspension ball jointsIInspect more frequently
depending on the conditionC, D, E, F, G
Disc brakes and pads, calipers and rotorsIInspect more frequently
depending on the conditionC, D, E, G, H
Parking brakeIInspect more frequently
depending on the conditionC, D, G, H

Maintenance
12
7
Severe driving conditions
A : 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 F : More than 50 % driving in heavy city traffic during hot
weather above 32°C (90°F)
G : Driving in mountainous areas
H : Towing a trailer
I : Driving for patrol car, taxi, commercial car or vehicle tow- ing
J : Driving over 140 km/h
K : Driving over 170 km/h
Maintenance itemMaintenance operationMaintenance intervalsDriving condition
Driveshaft and bootsIInspect more frequently
depending on the conditionC, D, E, F
Manual transaxle fluid (if equipped)REvery 120,000 kmC, D, E, G, H, I, K
Automatic transaxle fluid (if equipped)REvery 100,000 km A, C, D, E, F, G, H, I, K
Climate control air filter (if equipped)RReplace more frequently
depending on the conditionC, E

713
Maintenance
EXPLANATION OF SCHEDULED MAINTENANCE ITEMS
Engine oil and filter The engine oil and filter should be
changed at the intervals specified in the
maintenance schedule. If the car is being
driven in severe conditions, more fre-quent oil and filter changes are required. Drive belts
Inspect all drive belts for evidence of
cuts, cracks, excessive wear or oil satu-
ration and replace if necessary. Drive
belts should be checked periodically forproper tension and adjusted as neces-
sary. 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 exces-
sive amount of foreign matter accumu-
lates 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 authorised HYUNDAI
dealer.
Fuel lines, fuel hoses and con- nections
Check the fuel lines, fuel hoses and con-
nections for leakage and damage. Have
an authorised HYUNDAI dealer replace
any damaged or leaking parts immedi-
ately.Vapour hose and fuel filler cap
The vapour hose and fuel filler cap
should be inspected at those intervals
specified in the maintenance schedule.
Make sure that a new vapour hose or fuelfiller cap is correctly replaced.
Vacuum crankcase ventilation hoses (if equipped)
Inspect the surface of hoses for evidence
of heat and/or mechanical damage. Hard
and brittle rubber, cracking, tears, cuts,
abrasions, and excessive swelling indi-
cate deterioration. Particular attention
should be paid to examine those hose
surfaces nearest to high heat sources,
such as the exhaust manifold. Inspect the hose routing to assure that the hoses do not come in contact with
any heat source, sharp edges or movingcomponent which might cause heat dam-
age or mechanical wear. Inspect all hose
connections, such as clamps and cou-
plings, to make sure they are secure, and
that no leaks are present. Hoses should
be replaced immediately if there is any
evidence of deterioration or damage.

Maintenance
14
7
Air cleaner filter
A Genuine HYUNDAI air cleaner filter is recommended when the filter isreplaced. Spark plugs
Make sure to install new spark plugs of
the correct heat range.
Valve clearance
Inspect excessive valve noise and/or
engine vibration and adjust if necessary.
An authorised HYUNDAI dealer should
perform the operation. Cooling system
Check cooling system components, such
as radiator, coolant reservoir, hoses and
connections for leakage and damage.
Replace any damaged parts. Coolant The coolant should be changed at the
intervals specified in the maintenance
schedule.
Manual transaxle fluid (if equipped)
Inspect the manual transaxle fluid
according to the maintenance schedule.
Automatic transaxle fluid (if equipped)
Automatic transaxle fluid should not be
checked under normal usage conditions.
But in severe conditions, the fluid should
be changed at an authorised HYUNDAIdealer in accordance to the scheduledmaintenance at the beginning of this
chapter.
✽✽
NOTICE
Automatic transaxle fluid colour is basi-
cally red.
As the vehicle is driven, the automatic
transaxle fluid will begin to look darker.
It is normal condition and you should
not judge the need to replace the fluid
based upon the changed colour.
CAUTION
The use of a non-specified fluid could result in transaxle malfunc-
tion and failure.
Use only specified automatictransaxle fluid. (Refer to“Recommended lubricants and
capacities” in section 8.)

715
Maintenance
Brake hoses and lines
Visually check for proper installation,
chafing, cracks, deterioration and any
leakage. Replace any deteriorated or
damaged parts immediately. Brake fluid
Check brake fluid level in the brake fluid
reservoir. The level should be between
“MIN” and “MAX” marks on the side of
the reservoir. Use only hydraulic brake
fluid conforming to DOT 3 or DOT 4specification.
Parking brake
Inspect the parking brake system includ-
ing the parking brake pedal or lever and
cables.Brake discs, pads, calipers and
rotors
Check the pads for excessive wear, discs
for run out and wear, and calipers for fluid
leakage. Suspension mounting bolts
Check the suspension connections for
looseness or damage. Retighten to the
specified torque.
Steering gear box, linkage &
boots/lower arm ball joint
With the vehicle stopped and engine off,
check for excessive free-play in the
steering wheel.
Check the linkage for bends or damage.
Check the dust boots and ball joints for
deterioration, cracks, or damage.
Replace any damaged parts.Power steering pump, belt and hoses
Check the power steering pump and
hoses for leakage and damage. Replace
any damaged or leaking parts immedi-
ately. Inspect the power steering belt (or
drive belt) for evidence of cuts, cracks,
excessive wear, oiliness and proper ten-
sion. Replace or adjust it if necessary. Drive shafts and boots
Check the drive shafts, boots and clamps
for cracks, deterioration, or damage.
Replace any damaged parts and, if nec-
essary, repack the grease.
Air conditioning refrigerant (if equipped)
Check the air conditioning lines and con-
nections for leakage and damage.

Maintenance
16
7
ENGINE OIL
Checking the engine oil level
1. Be sure the vehicle is on level ground.
2. Start the engine and allow it to reach normal operating temperature. 3. Turn the engine off and wait for a few
minutes (about 5 minutes) for the oil to
return to the oil pan.
4. Pull the dipstick out, wipe it clean, and re-insert it fully.
5. Pull the dipstick out again and check the level. The level should be betweenF and L.
If it is near or at L, add enough oil to bring
the level to F.Do not overfill.
Use a funnel to help prevent oil frombeing spilled on engine components.
Use only the specified engine oil. (Refer to “Recommended lubricants and capaci-
ties” in section 8.)
WARNING - Radiator hose
Be very careful not to touch the
radiator hose when checking or
adding the engine oil as it may be
hot enough to burn you.
CAUTION
Do not overfill with engine oil. Engine damage may result.
OYF079003
OYF071003N
2.0L
2.4LOYF079004
OYF071004N
2.0L
2.4L

717
Maintenance
Changing the engine oil and filter
Have engine oil and filter changed by an
authorised HYUNDAI dealer according tothe Maintenance Schedule at the begin-ning of this section.
WARNING
Used engine oil may cause irrita- tion or cancer of the skin if left in
contact with the skin for prolonged
periods of time. Used engine oil
contains chemicals that have
caused cancer in laboratory ani-
mals. Always protect your skin by
washing your hands thoroughlywith soap and warm water as soon
as possible after handling used oil.

Maintenance
18
7
ENGINE COOLANT
The high-pressure cooling system has a
reservoir filled with year-round antifreeze
coolant. The reservoir is filled at the fac-
tory.
Check the antifreeze protection and
coolant level at least once a year, at thebeginning of the winter season, and
before travelling to a colder climate. Checking the coolant level
WARNING
- Removing
radiator cap
Never attempt to remove the radi- ator cap whilst the engine is
operating or hot. Doing so mightlead to cooling system and
engine damage and could result
in serious personal injury fromescaping hot coolant or steam.
Turn the engine off and wait until it cools down. Use extreme care
when removing the radiator cap.
Wrap a thick towel around it, and
turn it counterclockwise slowly to
the first stop. Step back whilst
the pressure is released from the
cooling system. When you aresure all the pressure has been
released, press down on the cap,
using a thick towel, and continue
turning counterclockwise to
remove it.
(Continued)
(Continued)
Even if the engine is not operat-ing, do not remove the radiator cap or the drain plug whilst the
engine and radiator are hot. Hot
coolant and steam may still blow
out under pressure, causing seri-
ous injury.

719
Maintenance
Check the condition and connections of all cooling system hoses and heater
hoses. Replace any swollen or deterio-
rated hoses.
The coolant level should be filled
between F and L marks on the side of the
coolant reservoir when the engine iscool.
If the coolant level is low, add enough
specified coolant to provide protection
against freezing and corrosion. Bring the
level to F, but do not overfill. If frequent
additions are required, see an authorised
HYUNDAI dealer for a cooling systeminspection.
Recommended engine coolant
When adding coolant, use only deion-ized water or soft water for your vehicle
and never mix hard water in the
coolant filled at the factory. An improp-
er coolant mixture can result in serious
malfunction or engine damage.
The engine in your vehicle has alu- minum engine parts and must be pro-
tected by an ethylene-glycol-based
coolant to prevent corrosion and freez-ing.
DO NOT USE alcohol or methanol coolant or mix them with the specifiedcoolant.
Do not use a solution that contains more than 60% antifreeze or less than
35% antifreeze, which would reduce
the effectiveness of the solution. For mixture percentage, refer to the fol-
lowing table.
-15°C (5°F) 35 65
-25°C (-13°F) 40 60
-35°C (-31°F) 50 50
-45°C (-49°F) 60 40
Ambient
Temperature Mixture Percentage (volume)
Antifreeze Water
OYF079005