belt HYUNDAI SONATA 2021 Repair Manual

Maintenance
8-16
Engine Oil and Filter
The engine oil and filter should be
changed at the intervals specified in the
maintenance schedule. If the vehicle
is being driven in severe conditions,
more frequent oil and filter changes are
required.
Drive Belts
Inspect all drive belts for evidence
of cuts, cracks, excessive wear or oil
saturation and replace if necessary. Drive
belts should be checked periodically
for proper tension and adjusted as
necessary.
Fuel Filter
A clogged-up fuel filter may limit the
vehicle driving speed, damage the
emission system, and cause the hard
starting. When a considerable amount
of foreign substances are accumulated
in the fuel tank, the fuel filter should be
replaced.
Upon installing a new fuel filter, operate
the engine for several minutes, and
check the connections for any leakages.
Fuel filters should be installed by an
authorized HYUNDAI dealer.
Fuel Lines, Fuel Hoses and
Connections
Check the fuel lines, fuel hoses and
connections for leakage and damage.
Have an authorized HYUNDAI dealer
replace any damaged or leaking parts
immediately.
Vapor Hose and Fuel Filler Cap
The vapor hose and fuel filler cap should
be inspected at those intervals specified
in the maintenance schedule. Make sure
a new vapor hose or fuel filler cap is
correctly replaced.
Air Cleaner Filter
A genuine HYUNDAI air cleaner filter
is recommended when the filter is
replaced.
Spark Plugs
Make sure to install new spark plugs of
the correct heat range.
Cooling System
Check cooling system components, such
as radiator, coolant reservoir, hoses and
connections for leakage and damage.
Replace any damaged parts.
Explanation of SChEdulEd maintEnanCE itEmS

08
8-41
3. Checking tire life (TIN : Tire
Identification Number)
Any tires that are over six years old,
based on the manufacturing date,
(including the spare tire) should be
replaced by new tires. You can find
the manufacturing date on the tire
sidewall (possibly on the inside of
the wheel), displaying the DOT Code.
The DOT Code is a series of numbers
on a tire consisting of numbers and
English letters. The manufacturing
date is designated by the last four
digits (characters) of the DOT code.
DOT : XXXX XXXX OOOO
The front part of the DOT shows a
plant code number, tire size and
tread pattern and the last four
numbers indicate week and year
manufactured.
For example:
DOT XXXX XXXX 1420 represents that
the tire was produced in the 14th
week of 2020.
4.

Tir
e ply composition and material
The number of layers or plies of
rubber-coated fabric in the tire. Tire
manufacturers also must indicate the
materials in the tire, which include
steel, nylon, polyester, and others.
The letter “R” means radial ply
construction; the letter “D” means
diagonal or bias ply construction;
and the letter “B” means belted-bias
ply construction. 5.

M
aximum permissible inflation
pressure
This number is the greatest amount
of air pressure that should be put in
the tire. Do not exceed the maximum
permissible inflation pressure. Refer
to the Tire and Loading Information
label for recommended inflation
pressure.
6.
M
aximum load rating
This number indicates the maximum
load in kilograms and pounds that
can be carried by the tire. When
replacing the tires on the vehicle,
always use a tire that has the same
load rating as the factory installed
tire.
7.
U

niform tire quality grading
Quality grades can be found where
applicable on the tire sidewall
between tread shoulder and
maximum section width.
For example:
TREAD WEAR 200
TRACTION AA
TEMPERATURE A

08
8-43
Curb Weight
This means the weight of a motor
vehicle with standard and optional
equipment including the maximum
capacity of fuel, oil and coolant, but
without passengers and cargo.
DOT Markings
A code molded into the sidewall
of a tire signifying that the tire
is in compliance with the U.S.
Department of Transportation motor
vehicle safety standards. The DOT
code includes the Tire Identification
Number (TIN), an alphanumeric
designator which can also identify
the tire manufacturer, production
plant, brand and date of production.
GVWR
Gross Vehicle Weight Rating
GAWR FRT
Gross Axle Weight Rating for the
Front Axle.
GAWR RR
Gross Axle Weight Rating for the
Rear axle.
Intended Outboard Sidewall
The side of an asymmetrical tire,
that must always face outward when
mounted on a vehicle.
Kilopascal (kPa)
The metric unit for air pressure.
Light truck (LT) tire
A tire designated by its manufacturer
as primarily intended for use on
lightweight trucks or multipurpose
passenger vehicles.Tire Terminology and Definitions
Air Pressure
The amount of air inside the tire
pressing outward on the tire. Air
pressure is expressed in pounds per
square inch (psi) or kilopascal (kPa).
Accessory Weight
This means the combined weight
of optional accessories. Some
examples of optional accessories
are automatic transmission, power
seats, and air conditioning
.
Aspect Ratio
The relationship of a tire’s height to
its width.
Belt
A rubber coated layer of cords that
is located between the plies and the
tread. Cords may be made from steel
or other reinforcing materials.
Bead
The tire bead contains steel wires
wrapped by steel cords that hold the
tire onto the rim.
Bias Ply Tire
A pneumatic tire in which the plies
are laid at alternate angles less than
90 degrees to the centerline of the
tread.
Cold Tire Pressure
The amount of air pressure in a tire,
measured in pounds per square inch
(psi) or kilopascals (kPa) before a tire
has built up heat from driving.

Maintenance
8-46
All Season Tires
HYUNDAI specifies all season
tires on some models to provide
good performance for use all year
round, including snowy and icy
road conditions. All season tires
are identified by ALL SEASON and/
or M+S (Mud and Snow) on the tire
sidewall. Snow tires have better
snow traction than all season tires
and may be more appropriate in
some areas.
Summer Tires
HYUNDAI specifies summer tires on
some models to provide superior
performance on dry roads. Summer
tire performance is substantially
reduced in snow and ice. Summer
tires do not have the tire traction
rating M+S (Mud and Snow) on
the tire side wall. If you plan to
operate your vehicle in snowy or icy
conditions, HYUNDAI recommends
the use of snow tires or all season
tires on all four wheels.
Snow Tires
If you equip your car with snow
tires, they should be the same size
and have the same load capacity as
the original tires. Snow tires should
be installed on all four wheels;
otherwise, poor handling may result.
Snow tires should carry 4 psi (28 kPa)
more air pressure than the pressure
recommended for the standard
tires on the tire label on the driver’s
side of the center pillar, or up to the
maximum pressure shown on the tire
sidewall, whichever is less. Do not
drive faster than 75 mph (120 km/h)
when your vehicle is equipped with
snow tires.
Radial-Ply Tires
Radial-ply tires provide improved
tread life, road hazard resistance
and smoother high speed ride. The
radial-ply tires used on this vehicle
are of belted construction, and are
selected to complement the ride
and handling characteristics of your
vehicle.
Radial-ply tires have the same load
carrying capacity, as bias-ply or
bias belted tires of the same size,
and use the same recommended
inflation pressure. Mixing of radial-
ply tires with bias-ply or bias belted
tires is not recommended. Any
combinations of radial-ply and bias-
ply or bias belted tires when used
on the same vehicle will seriously
deteriorate vehicle handling. The
best rule to follow is: Identical pairs
of radial-ply tires should always be
used as a set for the front tires and a
set for the rear tires.
Longer wearing tires can be more
susceptible to irregular tread wear.
It is very important to follow the tire
rotation interval in this chapter to
achieve the tread life potential of
these tires. Cuts and punctures in
radial-ply tires are repairable only in
the tread area, because of sidewall
flexing. Consult your tire dealer for
radial-ply tire repairs.
WARNING
Do not mix bias ply and radial ply
tires under any circumstances.
This may cause unusual handling
characteristics that may cause loss
of vehicle control resulting in an
accident.

Maintenance
8-68
NOTICE
Using anything but recommended
cleaners and procedures may affect the
fabric’s appearance and fire-resistant
properties.
Leather (if equipped)
• Features of seat leather
- L

eather is made from the outer skin
of an animal, which goes through a
special process to be available for
use. Since it is a natural product,
each part differs in thickness or
density.
Wrinkles may appear as a natural
result of stretching and shrinking
depending on the temperature and
humidity.
- The sea

t is made of stretchable
fabric to improve comfort.
- The parts con

tacting the body are
curved and the side supporting
area is high which provides driving
comfort and stability.
- W

rinkles may appear naturally
from usage. It is not a fault of the
products.
CAUTION
• Wrinkles or abrasions which appear
naturally from usage are not covered
by warranty.
• Belts with metallic accessories,
zippers or keys inside the back
pocket may damage the seat fabric.
• Make sure not to wet the seat. It may
change the nature of natural leather.
• Jeans or clothes which could bleach
may contaminate the surface of the
seat covering fabric. •
Caring for the leather seats
- V
acuum the seat periodically to
remove dust and sand on the seat. It
will prevent abrasion or damage of
the leather and maintain its quality.
- Wipe the na
tural leather seat cover
often with dry or soft cloth.
- U
se of proper leather protector may
prevent abrasion of the cover and
helps maintain the color. Be sure to
read the instructions and consult
a specialist when using leather
coating or protective agent.
- Ligh
t colored (beige, cream beige)
leather is easily contaminated and
the stain is noticeable. Clean the
seats frequently.
- A
void wiping with wet cloth. It may
cause the surface to crack.
• Cleaning the leather seats
- R
emove all contaminations
instantly. Refer to instructions below
for removal of each contaminant.
- Cosme
tic products (sunscreen,
foundation, etc.)
Apply cleansing cream on a cloth
and wipe the contaminated spot.
Wipe off the cream with a wet cloth
and remove water with a dry cloth. - Be verages (coffee, soft drink, etc.)
Apply a small amount of neutral
detergent and wipe until
contaminations do not smear.
- Oil R

emove oil instantly with
absorbable cloth and wipe with
stain remover used only for natural
leather.
- Che

wing gum
Harden the gum with ice and
remove gradually.

08
8-69
Cleaning the seat belt webbing
Clean the belt webbing with any
mild soap solution recommended for
cleaning upholstery or carpet. Follow
the instructions provided with the soap.
Do not bleach or re-dye the webbing
because this may weaken the seat belt.
Cleaning the interior window glass
If the interior glass surfaces of the
vehicle become hazy (that is, covered
with an oily, greasy or waxy film), they
should be cleaned with glass cleaner.
Follow the directions on the glass cleaner
container.
NOTICE
Do not scrape or scratch the inside of
the rear window. This may result in
damage to the rear window defroster
grid.
EmiSSion Control
S y
St
E m
The emission control system of your
vehicle is covered by a written limited
warranty. Please see the warranty
information contained in the Owner’s
Handbook & Warranty Information
booklet in your vehicle.
Your vehicle is equipped with an
emission control system to meet all
applicable emission regulations. There
are three emission control systems, as
follows.
(1)

Cr
ankcase emission control system
(2)

E
vaporative emission control system
(3)

Exhaus
t emission control system
In order to ensure the proper function
of the emission control systems, it
is recommended that you have your
vehicle inspected and maintained
by an authorized HYUNDAI dealer in
accordance with the maintenance
schedule in this manual.
NOTICE
For the Inspection and Maintenance
Test (with Electronic Stability Control
(ESC) system)
• To prevent the vehicle from misfiring
during dynamometer testing, turn
the Electronic Stability Control
(ESC) system off by pressing the ESC
switch (ESC OFF light illuminated).
• After dynamometer testing is
completed, turn the ESC system back
on by pressing the ESC switch again.

Maintenance
8-72
Perchlorate Material-special handling may apply, See:
www.dtsc.ca.gov/hazardouswaste/perchlorate.
Notice to California Vehicle Dismantlers:
Perchlorate containing materials, such as air bag inflators, seatbelt pretensioners and
keyless remote entry batteries, must be disposed of according to Title 22 California
Code of Regulations Section 67384.10 (a).
California pErChloratE no tiCE

Index
I-4
Bulb replacement ........................................................................\
.........................8-57
Headlamp

........................................................................\
................................ 8-57
Parking lamp


........................................................................\
........................... 8-57
Daytime running light
........................................................................\
............. 8-57
T

urn signal lamp

........................................................................\
...................... 8-57
Cornering lamp ........................................................................\
....................... 8-57
Side marker


........................................................................\
............................. 8-57
Auxiliary lamp


........................................................................\
........................ 8-57
Side repeater lamp


........................................................................\
................... 8-58
Rear combination light bulb


........................................................................\
.... 8-58
High mounted stop lamp


........................................................................\
......... 8-60
License plate light


........................................................................\
.................. 8-60
Interior light


........................................................................\
........................... 8-61
Bulb wattage


........................................................................\
.................................. 2-8
C
California perchlorate notice


........................................................................\
....... 8-72
Capacities (Lubricants)


........................................................................\
................ 2-11
Care Tire care


........................................................................\
................................... 8-34
Exterior care


........................................................................\
............................ 8-63
Interior care


........................................................................\
............................. 8-67
Center console storage


........................................................................\
............... 5-144
Central door lock/unlock switch


........................................................................\
.. 5-33
Certification label


........................................................................\
........................ 2-13
Check tire inflation pressure


........................................................................\
........ 8-35
Child restraint system (CRS)


........................................................................\
....... 3-29
Selecting a child restraint system (CRS)


.........................................................3-30
Rearward-facing child restraint system


...........................................................3-30
Forward-facing child restraint system


.............................................................3-31
Booster seats........................................................................\
............................ 3-31
Installing a child restraint system (CRS)


........................................................3-31
Lower anchors and tether for Children (LATCH System)
..............................3-32
Lower anchors

........................................................................\
........................ 3-33
T

ether anchors

........................................................................\
......................... 3-34
Lap/shoulder belt


........................................................................\
..................... 3-35
Child-protector rear door lock


........................................................................\
..... 5-35
Climate control air filter


........................................................................\
.............. 8-28

Index
I-8
Horn ........................................................................\
.............................................5-45
How to use this manual

........................................................................\
................. 1-4
Hyundai digital key........................................................................\
...................... 5-15 Digital key application


........................................................................\
............ 5-15
Digital key (smartphone) NFC function


.........................................................5-15
Digital key (smartphone)........................................................................\
......... 5-16
Digital key (card key)........................................................................\
.............. 5-23
I
If the engine doesn’t turn over or turns over slowly
.............................................. 7-3
If the engine overheats


........................................................................\
................... 7-6
If the engine stalls at a crossroad or crossing


........................................................7-2
If the engine stalls while driving


........................................................................\
... 7-2
If the engine turns over normally but doesn’t start


................................................7-3
If the engine will not start


........................................................................\
.............. 7-3
If you have a flat tire while driving


....................................................................... 7-3
Ignition switch


........................................................................\
............................... 6-6
Key ignition switch


........................................................................\
................... 6-6
Engine Start/Stop button
........................................................................\
........... 6-9
Remote start


........................................................................\
............................ 6-12
Immobilizer system


........................................................................\
..................... 5-14
Improtant safety precautions........................................................................\
.......... 3-2 Always wear your seat belt


........................................................................\
....... 3-2
Restrain all children


........................................................................\
.................. 3-2
Air bag hazards
........................................................................\
......................... 3-2
Driver distraction


........................................................................\
...................... 3-2
Control your speed


........................................................................\
.................... 3-2
Keep your vehicle in safe condition


.................................................................. 3-2
In case of emergency while driving


....................................................................... 7-2
Infotainment system........................................................................\
................... 5-152 AUX, USB and iPo
d® port ........................................................................\
..... 5-152
Antenna

........................................................................\
................................. 5-152
Steering wheel audio controls


....................................................................... 5-153
Bluetooth
® Wireless Technology hands-free ................................................. 5-154
Audio /
Video / Navigation system

............................................................... 5-154
Blue Link
® center ........................................................................\
.................. 5-154
Inside rearview mirror

........................................................................\
................. 5-46

Index
I-12
Manual climate control system ........................................................................\
.. 5-118
Heating and air conditioning

........................................................................\
. 5-119
Mode selection


........................................................................\
...................... 5-120
Instrument panel vents


........................................................................\
.......... 5-122
Temperature control


........................................................................\
.............. 5-122
Air intake control


........................................................................\
.................. 5-122
Fan speed control


........................................................................\
.................. 5-123
Air conditioning


........................................................................\
.................... 5-123
System operation


........................................................................\
................... 5-124
System maintenance


........................................................................\
.............. 5-125
Air conditioning refrigerant label.................................................................. 5-126
Mirrors
........................................................................\
......................................... 5-46
Inside rearview mirror


........................................................................\
............. 5-46
HomeLink
® system........................................................................\
.................. 5-47
Side view mirrors

........................................................................\
.................... 5-53
Adjusting the side view mirrors


...................................................................... 5-54
Folding the side view mirrors


........................................................................\
. 5-54
Reverse parking aid function


........................................................................\
.. 5-55
N
Navigation-based Smart Cruise Control (NSCC)


..............................................6-112
O
Occupant Classification System (OCS)


............................................................... 3-47
Odometer
........................................................................\
....................................... 4-5
Oil (Engine)


........................................................................\
................................. 8-19
Outside temperature gauge


........................................................................\
............ 4-5
Owner maintenance


........................................................................\
....................... 8-5
P
Panoramic sunroof
........................................................................\
....................... 5-60
Parking lamp position


........................................................................\
.................. 5-75
Passenger’s front air bag


........................................................................\
.............. 3-39
Power brakes

........................................................................\
................................ 6-20
Power outlet
........................................................................\
............................... 5-146
Power window lock switch

........................................................................\
.......... 5-59
Pre-tensioner seat belt


........................................................................\
.................. 3-24
Retractor pretensioner


........................................................................\
............. 3-24