2023 HYUNDAI SONATA engine

2-9
02
„„Smartstream G2.5 T-GDI
The actual engine room in the vehicle may differ from the illustration.ODN8N080009L
1. Engine coolant reservoir ......................8-26
2. Brake fluid reservoir .............................8-29
3. Air cleaner .............................................. 8-31
4. Engine oil dipstick ................................ 8-235. Engine oil filler cap
...............................8-23
6. Windshield washer fluid reservoir .......8-30
7. Fuse box ................................................ 8-56
8. Battery ................................................... 8-36

Vehicle Information and Reporting Safety Defects
2-10
DimEnsions
Itemsmm (in.)
Overall length
4,900 (192.9)
Overall width 1,860 (73.2)
Overall height 1,445 (56.9)
Front tread 205/65 R16 1,633 (64.3)
215/55 R17 1,623 (63.9)
235/45 R18 1,618 (63.7)
245/40 R19 1,610 (63.3)
Rear tread 205/65 R16 1,640 (64.6)
215/55 R17 1,630 (64.2)
235/45 R18 1,625 (64.0)
245/40 R19 1,617 (63.6)
Wheelbase 2,840 (111.8)
EnginE sPECifiCation
ItemSmartstream
G1.6 T-GDi Smartstream
G2.5 GDi Smartstream
G2.5 T-GDI
Displacement cc (cu. in.) 1,591 (97.08) 2,497 (152.37) 2,497 (152.4)
Bore x Stroke mm (in. )77 x 85.44
(3.03 x 3.06) 88.5 x 101.5
(3.47 x 4.00) 88.5 x 101.5
(3.47 x 4.00)
Firing order 1-3-4-2 1-3-4-2 1-3-4-2
No. of cylinders 4, in-line 4, in-line 4, in-line

Vehicle Information and Reporting Safety Defects
2-14
rECommEnDED luBriCants anD CaPaCitiEs
To help achieve proper engine and powertrain performance and durability, use only
lubricants of the proper quality. The correct lubricants also help promote engine
efficiency that results in improved fuel economy.
These lubricants and fluids are recommended for use in your vehicle.
Lubricant Volume Classification
Engine oil *1

(drain and refill) Smartstream
G1.6 T-GDi 4.8
ℓ (5.07 US qt.)
SAE 0W-20 / API SN PLUS/SP or
ILSAC GF-6 *2
Smartstream G2.5 GDi 5.8 ℓ (6.13 US qt.)
Smartstream
G2.5 T-GDi 6.13 US qt. (5.8 ℓ)
SAE 0W-30 API SN PLUS /SP or
ILSAC GF-6 *
2
Automatic transmission fluid 6.5 ℓ (6.89 US qt.) MICHANG ATF SP-IV, SK ATF SP IV,
NOCA ATF SP-IV, S-oil ATF SP-IV
HYUNDAI genuine ATF SP-IV
Dual clutch
transmission fluid Gear oil
3.3~3.4 L
(3.49~3.59 U.S.qt) GS WDCTF HD G(GS CALTEX)
Control oil 2.45~2.5 L
(2.59~2.64 U.S.qt) GS WDCTF HD H(GS CALTEX)
Coolant Smartstream
G1.6 T-GDi
8.03 US qt. (7.6 ℓ)
Mixture of antifreeze and distilled
water (Ethylene glycol base coolant
for aluminum radiator)
Smartstream G2.5 GDi
9.07 US qt. (8.59 ℓ)
Smartstream
G2.5 T-GDi 8.59 US qt. (8.13 ℓ)
Brake fluid *2
0.7 ~ 0.8
ℓ
(0.74 ~ 0.85 US qt.) DOT-4
Fuel 60
ℓ (15.85 US gal.)
56 ℓ (14.79 US gal.)
(for ECO package model) Refer to “Fuel requirements” in
chapter 1.
*1 : Refer to the recommended SAE viscosity numbers on page 12.
*2 : Requires < API SN PLUS (or above) Full synthetic> grade engine oil.

02
2-15
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 * 1Smartstream
G1.6 T-GDI
Smartstream G2.5 GDI
Smartstream G2.5 T-GDI
0W-30
0W-20
* 1
: Requires grade engine oil.
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.

02
2-17
tirE sPECifiCation anD PrEssurE laBEl
ODN8H019025L
The tires supplied on your new
vehicle are chosen to provide the best
performance for normal driving.
The tire label located on the driver’s
side center pillar gives the tire pressures
recommended for your car.
EnginE numBEr
ODN8019022
The engine number is stamped on the
engine block as shown in the drawing.

Seats & Safety System
3-16
„„Front
ODN8039019
„„Rear
ODN8039022
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:
- Front seat

UP UP
OFF
g HIGH () g HIGH ()
DOWN
h i DOWN
LOW () f MIDDLE () g HIGH ()
DOWN U
P
•
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.
- Front seat
OFF g HIGH ()
h i 30 MIN
LOW () f MIDDLE ()
60 MIN
- Rear seat (if equipped)
OFF g HIGH () g LOW ()
h
30 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.

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.

Seats & Safety System
3-42
WARNING
To reduce the risk of serious injury or
death from an inflating curtain air bag,
take the following precautions: • All seat occupants must wear
seat belts at all times to help keep
occupants positioned properly.
• Properly secure child restraints as far
away from the door as possible.
• Do not place any objects over the air
bag. Also, do not attach any objects
around the area the air bag inflates
such as the door, side door glass,
front and rear pillar, roof side rail.
• Do not hang other objects except
clothes, especially hard or breakable
objects. In an accident, it may cause
vehicle damage or personal injury.
• Do not allow passengers to lean their
heads or bodies onto doors, put their
arms on the doors, stretch their arms
out of the window, or place objects
between the doors and seats.
• Do not open or repair the side curtain air bags.How Does the Air Bag System
Operate?
ODN8039033
The SRS consists of the following
components:
1. Driver’s front air bag module
2. Passenger’s front air bag module
3. Side air bag modules (front)
4. Curtain air bag modules
5. Retractor pre-tensioner assemblies
6. Air bag warning light
7. SRS control module (SRSCM) /
Rollover sensor
8. Front impact sensors
9. Side impact sensors (acceleration)
10. Side impact sensors (pressure)
11. Driver’s knee air bag module
12. Occupant classification system
13. Side air bag modules (rear)
The SRSCM (Supplemental Restraint
System Control Module) continually
monitors all SRS components while the
Engine Start/Stop button is in the ON or
START position to determine if a crash
impact is severe enough to require air
bag deployment or pre-tensioner seat
belt deployment.