2023 HYUNDAI SONATA brake

2-6
Vehicle Information and Reporting Safety Defects
The actual shape may differ from the illustration.ODN8A011003C
1. Inside door handle .................................5-17
2. Seat position memory system * ..........5-24
3. Side view mirror control switch ...........5-40
4. Central door lock switch .......................5-18
5. Power window switches ......................5-43
6. Power window lock button ..................5-45
7. Steering wheel tilt/telescopic lever ....5-28
8. Steering wheel ....................................... 5-279.
Instrument panel illumination control
switch ...................................................... 4-4
10. Lane Keeping Assist system button * ..................................... 6-71
11. Trunk release button .............................5-51
12. ESC OFF button .................................... 6-39
13. EPB (Electronic Parking Brake) .............6-31
14. Hood release lever ................................5-50
* : if equipped
intErior ovErviEw

2-8
Vehicle Information and Reporting Safety Defects
„„Smartstream G1.6 T-GDi
„„Smartstream G2.5 GDi
The actual engine room in the vehicle may differ from the illustration.ODN8089103/ ODN8N080008L
EnginE ComPartmEnt
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
...............................8-24
6. Windshield washer fluid reservoir .......8-30
7. Fuse box ................................................ 8-56
8. Battery ................................................... 8-36

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
2-14
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.

03
3-11
WARNING
When returning the rear seatback from
a folded to an upright position, hold the
seatback and return it slowly. Ensure
that the seatback is completely locked
into its upright position by pushing on
the top of the seatback. In an accident
or sudden stop, an unlocked seatback
could allow cargo to move forward with
great force and enter the passenger
compartment, which could result in
serious injury or death.
WARNING
Do not place objects in the rear seats,
since they cannot be properly secured
and may hit vehicle occupants in a
collision causing serious injury or death.
WARNING
Make sure the vehicle is off, the shift
button is in P (Park), and the parking
brake is securely applied whenever
loading or unloading cargo. Failure
to take these steps may allow the
vehicle to move if the shift button
is inadvertently moved to another position. Armrest (if equipped)
ODN8039018
The armrest is located in the center of
the rear seat. Pull the armrest down from
the seatback to use it.
Head Restraints
The vehicle’s front and rear seats
have adjustable head restraints. The
head restraints provide comfort for
passengers, but more importantly they
are designed to help protect passengers
from whiplash and other neck and spinal
injuries during an accident, especially in
a rear impact collision.
WARNING
To reduce the risk of serious injury or
death in an accident, take the following
precautions when adjusting your head
restraints: • Always properly adjust the head
restraints for all passengers BEFORE
starting the vehicle.
• NEVER let anyone ride in a seat
with the head restraints removed or
reversed.

03
3-55
ODN8039052L
Front air bags are not designed to inflate
in rear collisions, because occupants
are moved backward by the force of the
impact. In this case, inflated air bags
would not provide any additional benefit.
ODN8A039053
Front air bags may not inflate in side
impact collisions, because occupants
move in the direction of the collision,
and thus in side impacts, front air bag
deployment would not provide additional
occupant protection.
However, side and curtain air bags may
inflate depending on the severity of impact.
ODN8039059
In an angled collision, the force of impact
may direct the occupants in a direction
where the air bags would not be able to
provide any additional benefit, and thus
the sensors may not deploy any air bags.
ODN8039054
Just before impact, drivers often brake
heavily. Such heavy braking lowers the
front portion of the vehicle causing it
to “ride” under a vehicle with a higher
ground clearance. Air bags may not
inflate in this “underride” situation
because deceleration forces that are
detected by sensors may be significantly
reduced by such “underride” collisions.

04
4-11
Warning and Indicator Lights
Information
Make sure that all warning lights are OFF
after starting the engine. If any light is still ON, this indicates a situation that needs attention.
Air Bag Warning Light
This warning light illuminates:
• When you place the ignition switch to the ON position.
- The air bag warning light illuminates for about 6 seconds and then turns
off when all checks have been
performed
• The air bag warning light will remain
illuminated if there is a malfunction
with the Safety Restraint System (SRS)
air bag operation.
In this case, have the vehicle
inspected by an authorized HYUNDAI
dealer.
Seat Belt Warning Light
This warning light informs the driver that
the seat belt is not fastened.
For more information, refer to “Seat
Belts” in chapter 3. Parking Brake & Brake Fluid
Warning Light
This warning light illuminates:
•
When you place the ignition switch to the ON position.
- The parking brake light illuminates for about 3 seconds and will then
turn off once the parking brake is
released.
• Whenever the parking brake is applied.
• Whenever the brake fluid level in the
reservoir is low.
- If the warning light illuminates with the parking brake released, it
indicates that the brake fluid level in
the reservoir is low.
If the brake fluid level in the reservoir is low:
1. Drive carefully to the nearest safe location and stop your vehicle.
2. With the engine stopped, check the brake fluid level immediately
and add fluid as required (For more
information, refer to "Brake Fluid" in
chapter 8) . After adding brake fluid,
check all brake components for fluid
leaks. If a brake fluid leak is found, or
if the warning light remains on, or if
the brakes do not operate properly, do
not drive the vehicle. Have the vehicle
inspected by an authorized HYUNDAI
dealer.

Instrument Cluster
4-12
Dual-diagonal braking system
Your vehicle is equipped with dual-
diagonal braking systems. This means
you still have braking on two wheels even
if one of the dual systems should fail.
With only one of the dual systems
working, more than normal pedal travel
and greater pedal pressure is required to
stop the vehicle.
If the brakes fail while you are driving,
shift to a lower gear for additional engine
braking and stop the vehicle as soon as it
is safe to do so.
WARNING
Parking Brake & Brake Fluid Warning
Light
Driving the vehicle with a warning light
ON is dangerous. If the Parking Brake &
Brake Fluid Warning Light illuminates
with the parking brake released, it
indicates that the brake fluid level is
low.
In this case, have the vehicle inspected
by an authorized HYUNDAI dealer. Anti-lock Brake System (ABS)
Warning Light
This warning light illuminates:
•
When you place the ignition switch to the ON position.
- The ABS warning light illuminates for about 3 seconds and then turns
off.
• Whenever there is a malfunction with the ABS.
Note that the hydraulic braking
system will still be operational even if
there is a malfunction with the ABS.
Electronic Brake Force
Distribution (EBD) System
Warning Light
These two warning lights illuminate at the same time while driving:
When the ABS and regular brake system
may not work normally.
In this case, have the vehicle inspected
by an authorized HYUNDAI dealer.
WARNING
Electronic Brake Force Distribution
(EBD) System Warning Light
When both ABS and Parking Brake &
Brake Fluid Warning Lights are on, the
brake system will not work normally
and you may experience an unexpected
and dangerous situation during sudden
braking.
In this case, avoid high speed driving
and abrupt braking.
Have the vehicle inspected by an
authorized HYUNDAI dealer as soon as possible.