2021 HYUNDAI SONATA temperature

02
2-9
tirEs anD whEEls
Item Tire SizeWheel
Size Inflation pressure kPa (psi)
Wheel
lug nut torque kgf·m
(lbf·ft, N·m)
Normal load
*1Maximum load
Front RearFront Rear
Full size tire 205/65 R16 6.5Jx16 240 (35) 240 (35) 240 (35) 240 (35)
11~13
(79~94,
107~127)
215/55 R17 7.0Jx17 240 (35) 240 (35) 240 (35) 240 (35)
235/45 R18 7.5Jx18 240 (35) 240 (35) 240 (35) 240 (35)
245/40 R19 8.0JX19 240 (35) 240 (35) 240 (35) 240 (35)
Compact
spare tire
(if equipped) T125/80 D16 4Tx16 420 (60) 420 (60) 420 (60) 420 (60)
T135/80 D17 4Tx17 420 (60) 420 (60) 420 (60) 420 (60)
T135/80 D18 4Tx18 420 (60) 420 (60) 420 (60) 420 (60)
*1 : Normal load: Up to 3 persons
NOTICE
• It is permissible to add 3 psi to the standard tire pressure specification if colder
temperatures are expected soon.
Tires typically lose 1psi (7kPa) for every 12°F temperature drop. If extreme
temperature variations are expected, recheck your tire pressure as necessary to
keep them properly inflated.
• Tire inflation pressures will vary with changes in elevation. If driving in areas of
higher or lower elevation, be sure to check and adjust for proper tire inflation.
CAUTION
• When replacing tires, use the same size originally supplied with the vehicle.
Using tires of a different size can damage the related parts or not work properly.
• When replacing tires, ALWAYS use the same size, type, construction and tread
pattern supplied with the vehicle for all tires.

Vehicle Information
2-12
Recommended SAE Viscosity
Number
CAUTION
Always be sure to clean the area around
any filler plug, drain plug, or dipstick
before checking or draining any
lubricant. This is especially important
in dusty or sandy areas and when the
vehicle is used on unpaved roads.
Cleaning the plug and dipstick areas
will prevent dirt and grit from entering
the engine and other mechanisms that
could be damaged.Engine oil viscosity (thickness) has an
effect on fuel economy and cold weather
operating (engine start and engine oil
flowability). Lower viscosity engine oils
can provide better fuel economy and
cold weather performance, however,
higher viscosity engine oils are required
for satisfactory lubrication in hot
weather.
Using oils of any viscosity other than
those recommended could result in
engine damage.
When choosing an oil, consider the
range of temperature your vehicle will be
operated in before the next oil change.
Proceed to select the recommended oil
viscosity from the chart.
Temperature Range for SAE Viscosity Numbers
Temperature °C
-30 -20 -10 0 10 20 30 40 50
(°F) -100 20 40 60 80 100 120
Engine Oil *
10W-20
*1 : Requires grade engine oil. If a lower grade
engine oil (mineral oil including Semi-synthetic) is used, then the engine oil and engine
oil filter must be replaced as indicated for severe maintenance condition.
An engine oil displaying this American Petroleum Institute(API)
Certification Mark conforms to the International Lubricant Specification
Advisory Committee (ILSAC). It is recommended to only use engine oils
that uphold this API Certification Mark.

03
3-15
Seat Warmers and Air Ventilation
Seats
Front seat warmers (if equipped)
Seat warmers are provided to warm the
seats during cold weather.
WARNING
The seat warmers can cause a SERIOUS
BURN, even at low temperatures and
especially if used for long periods of
time.
Passengers must be able to feel if the
seat is becoming too warm so they can
turn it off, if needed.
People who cannot detect temperature
change or pain to the skin should
use extreme caution, especially the
following types of passengers:
• Infants, children, elderly or disabled
persons, or hospital outpatients.
• People with sensitive skin or who
burn easily.
• Fatigued individuals.
• Intoxicated individuals.
• People taking medication that can
cause drowsiness or sleepiness.
WARNING
NEVER place anything on the seat
that insulates against heat when the
seat warmer is in operation, such as a
blanket or seat cushion. This may cause
the seat warmer to overheat, causing a
burn or damage to the seat.
NOTICE
To prevent damage to the seat warmers
and seats:
Never use a solvent such as paint
thinner, benzene, alcohol or gasoline to
clean the seats.
Do not place heavy or sharp objects on
seats equipped with seat warmers.
Do not change the seat cover. It
may damage the seat warmer or air
ventilation system.

3-16
„„Front
ODN8039019
While the engine is running, push either
of the switches to warm the driver’s seat
or front passenger’s seat.
During mild weather or under conditions
where the operation of the seat warmer
is not needed, keep the switches in the
OFF position.
• Manual temperature control Each time you push the switch, the
temperature setting of the seat is
changed as follows:
- F

ront seat
UP UP
OFF g HIGH () g HIGH ()
DOWN h i DOWN
LOW () f MIDDLE () g HIGH ()

DOWN UP
• Automatic temperature control The seat warmer starts to automatically
control the seat temperature in order
to prevent low-temperature burns after
being manually turned ON.
- F

ront seat
OFF g HIGH ()
h i 30 MIN
LOW () f MIDDLE ()
60 MIN
You may manually press the switch to
increase seat temperature. However, it
soon returns the automatic mode again.
• When pressing the switch for more
than 1.5 seconds with the seat warmer
operating, the seat warmer will turn OFF.
• The seat warmer defaults to the OFF
position whenever the ignition switch is
in the ON position. However, if the Auto
Comfort Control function is ON, the
driver’s seat warmer will turn on and off
depending on the ambient temperature.
• Auto Comfort Control (for driver’s seat, if
equipped)
The seat warmer automatically controls
the seat temperature depending on the
ambient temperature when the engine
is running. If the seat warmer switch is
pushed, the seat warmer will have to be
controlled manually. To use this function,
it must be activated from the Settings
menu in the AVN system screen. For
more information, refer to the separately
supplied Car Infotainment System
manual.
Seats & Safety System

03
3-17
Front air ventilation seat
(if equipped)
ODN8039023
The air ventilation seats are provided
to cool the front seats by blowing air
through small vent holes on the surface
of the seat cushions and seatbacks.
When the operation of the air ventilation
seat is not needed, keep the switches in
the OFF position.
While the engine is running, push the
switch to cool the driver’s seat or the
front passenger’s seat.
• Each time you push the switch, the airflow
changes as follows:
DOWN DOWN
OFF g HIGH () g HIGH ()
UP h i UP
LOW () f MIDDLE () g HIGH ()

UP DOWN
• When pressing the switch for more than
1.5 seconds with the air ventilation seat
operating, the operation will turn OFF.
• The air ventilation seat defaults to the
OFF position whenever the ignition switch
is in the ON position. However, if the
Auto Comfort Control function is ON,
the driver’s air ventilation seat will turn
on and off depending on the ambient
temperature.
• Auto Comfort Control (for driver’s seat, if
equipped)
The air ventilation seat automatically
controls the seat temperature depending
on the ambient temperature when the
engine is running. If the air ventilation
seat switch is pushed, the seat warmer
will have to be controlled manually. To use
this function, it must be activated from
the Settings menu in the AVN system
screen. For more information, refer to
the separately supplied Car Infotainment
System manual.

4-2
Instrument Cluster
ODN8A049039/Odn8a049032/ODN8A049002
Instrument Cluster
1. Tachometer
2.

Speedome
ter
3.

E
ngine coolant temperature gauge 4. F
uel gauge
5.
W
arning and indicator lights
6.

L
CD display (including trip computer)
The actual cluster in the vehicle may differ from the illustration.
For more information, refer to the "Gauges and Meters" in this chapter.
„„Type A
„
„Type B
„
„Type C

Instrument Cluster
4-4
Engine coolant temperature gauge
ODN8A049041
ODN8A049006This gauge indicates the temperature
of the engine coolant when the ignition
switch is in the ON position.
NOTICE
If the gauge pointer moves beyond
the normal range area toward the "H"
position, it indicates overheating that
may damage the engine.
Do not continue driving with an
overheated engine. If your engine
overheats, refer to "If the Engine
Overheats" in chapter 7.
WARNING
Never remove the radiator cap or
reservoir cap when the engine is hot.
The engine coolant is under pressure
and could severely burn. Wait until the
engine is cool before adding coolant to
the reservoir.
Fuel gauge
ODN8A049040
ODN8A049007This gauge indicates the approximate
amount of fuel remaining in the fuel tank.
Information
• The fuel tank capacity is given in
chapter 2.
• The fuel gauge is supplemented by
a low fuel warning light, which will
illuminate when the fuel tank is nearly
empty.
• On inclines or curves, the fuel gauge
pointer may fluctuate or the low fuel
warning light may come on earlier than
usual due to the movement of fuel in
the tank.
„„Type A, B
„
„Type C „
„Type A, B
„
„Type C

04
4-5
WARNING
Running out of fuel can expose vehicle
occupants to danger.
You must stop and obtain additional
fuel as soon as possible after the
warning light comes on or when the
gauge indicator comes close to the "E
(Empty)" level.
NOTICE
Avoid driving with an extremely low
fuel level. Running out of fuel could
cause the engine to misfire and damage
the catalytic converter.
Outside temperature gauge
OTMA048112
oDN8A049031This gauge indicates the current outside
air temperature by 1°F (1°C).
- T
emperature range: -40°F ~ 140°F
(40°C ~ 60°C)
Note that the temperature indicated
on the LCD display may not change
as quickly as the outside temperature
(there may be a slight delay before the
temperature changes.) You can change the temperature unit
from °F to °C or °C to °F in the User
Settings mode in the cluster:
-
Go
to User Settings Mode → Other →
T

emperature Unit.
For vehicles equipped with Automatic
Climate Control, you can also:
- Pr
ess and hold the AUTO and OFF
buttons on the climate control unit for
3 seconds
Both the temperature unit on the cluster
LCD display and climate control screen
will change.
Odometer
OTMA048183
ODN8A049037The odometer indicates the total
distance that the vehicle has been
driven and should be used to determine
when periodic maintenance should be
performed.
„„Type C
„
„Type A, B
„
„Type C
„
„Type A, B