
Convenient Features
5-136
Air conditioning system operation tips
• If the vehicle has been parked in
direct sunlight during hot weather,
open the windows for a short time
to let the hot air inside the vehicle
escape.
• After sufficient cooling has been
achieved, switch back from the
recirculated air to the fresh outside air
position.
• To help reduce moisture inside of
the windows on rainy or humid
days, decrease the humidity inside
the vehicle by operating the air
conditioning system with the windows
and sunroof closed.
• Use the air conditioning system
every month only for a few minutes
to ensure maximum system
performance.
• If you operate air conditioner
excessively, the difference between
the temperature of the outside air and
that of the windshield could cause
the outer surface of the windshield
to fog up, causing loss of visibility. In
this case, set the mode selection knob
or button to the
position and fan
speed control to the lower speed.
System Maintenance
Cabin air filter
OIK047401L[A] : Outside air, [B] : Recirculated air
[C] : Cabin air filter, [D] : Blower
[E] : Evaporator core, [F] : Heater core
The cabin air filter is installed behind
the glove box. It filters the dust or other
pollutants that enter the vehicle through
the heating and air conditioning system.
Have the cabin air filter replaced by an
authorized HYUNDAI dealer according to
the maintenance schedule. If the vehicle
is being driven in severe conditions such
as dusty or rough roads, more frequent
cabin air filter inspections and changes
are required.
If the air flow rate suddenly decreases,
the system should be checked at an
authorized HYUNDAI dealer.

05
5-145
interior FeAtures
Cup Holder
Front
ODN8059218
Rear
ODN8059219
Cups or small beverages cups may be
placed in the cup holders.
WARNING
• Avoid abrupt starting and braking
when the cup holder is in use to
prevent spilling your drink. If hot
liquid spills, you could be burned.
Such a burn to the driver could cause
loss of vehicle control resulting in an
accident.
• Do not place uncovered or unsecured
cups, bottles, cans, etc., in the cup
holder containing hot liquid while
the vehicle is in motion. Injuries may
result in the event of a sudden stop
or collision.
• Only use soft cups in the cup holders.
Hard objects can injure you in an
accident.
WARNING
Keep cans or bottles out of direct sun
light and do not put them in a hot
vehicle. It may explode.
NOTICE
• Keep your drinks sealed while driving
to prevent spilling your drink. If liquid
spills, it may get into the vehicle’s
electrical/electronic system and
damage electrical/electronic parts.
• When cleaning spilled liquids do not
use hot air to blow out or dry the cup
holder. This may damage the interior.
![HYUNDAI SONATA 2021 Owners Manual Convenient Features
5-148
Wireless Cellular Phone
Charging System (if equipped)
ODN8059223
[A]: Indicator light, [B]: Charging pad
On certain models, the vehicle comes
equipped with a wireless cellu HYUNDAI SONATA 2021 Owners Manual Convenient Features
5-148
Wireless Cellular Phone
Charging System (if equipped)
ODN8059223
[A]: Indicator light, [B]: Charging pad
On certain models, the vehicle comes
equipped with a wireless cellu](/manual-img/35/41164/w960_41164-277.png)
Convenient Features
5-148
Wireless Cellular Phone
Charging System (if equipped)
ODN8059223
[A]: Indicator light, [B]: Charging pad
On certain models, the vehicle comes
equipped with a wireless cellular phone
charger.
The system is available when all doors
are closed, and when the ignition switch
is ON.
To charge a cellular phone
The wireless cellular phone charging
system charges only the Qi-enabled
cellular phones. Read the label on the
cellular phone accessory cover or visit
your cellular phone manufacturer’s
website to check whether your cellular
phone supports the Qi technology.
The wireless charging process starts
when you put a Qi-enabled cellular
phone on the wireless charging unit.
1.
R
emove other items, including the
smart key, from the wireless charging
unit. If not, the wireless charging
process may be interrupted. Place
the cellular phone on the center of
the charging pad (
).
2.
The indica
tor light is orange when
the cellular phone is charging. The
indicator light turns green when
phone charging is complete.
3.
Y
ou can turn ON or OFF the wireless
charging function in the user settings
mode on the instrument cluster. For
further information, refer to the “LCD
Display Modes” in this chapter.
If your cellular phone is not charging:
-
Sligh
tly change the position of the
cellular phone on the charging pad.
-
Mak
e sure the indicator light is
orange.
The indicator light will blink orange for 10
seconds if there is a malfunction in the
wireless charging system.
In this case, temporarily stop the
charging process, and re-attempt to
charge your cellular phone again.
The system warns you with a message
on the LCD display if the cellular phone
is still on the wireless charging unit after
the engine is turned OFF and the front
door is opened.
Information
For some manufacturers’ cellular phones,
the system may not warn you even though
the cellular phone is left on the wireless
charging unit. This is due to the particular
characteristic of the cellular phone and
not a malfunction of the wireless charging.
NOTICE
• The wireless cellular phone charging system may not support certain
cellular phones, which are not
verified for the Qi specification (
).
•
When placing y
our cellular phone
on the charging mat, position the
phone in the middle of the mat for
optimal charging performance. If
your cellular phone is off to the side,
the charging rate may be less and in
some cases the cellular phone may
experience higher heat conduction.
•
In some cases, the wir
eless charging
may stop temporarily when the
Remote Key or Smart Key is used,
either when starting the vehicle or
locking/unlocking the doors, etc.
•
When char
ging certain cellular
phones, the charging indicator
may not change to green when the
cellular phone is fully charged.

Lane Keeping Assist (LKA) ........................................................................\
..6-59LKA Operation ........................................................................\
................................ 6-61
LKA S ystem Function Change ........................................................................\
....... 6-61
Warning Light and Message
........................................................................\
.......... 6-64
Limitations of the System
........................................................................\
.............. 6-65
Blind-Spot Collision Warning (BCW) /
Blind-Spot Collision-Avoidance Assist (BCA)
............................................6-67
System Description ........................................................................\
........................ 6-67
S ystem Setting and Activation ........................................................................\
...... 6-68
Warning and System Control
........................................................................\
......... 6-70
Detecting Sensors
(Front view camera and Rear corner radar).......................................................... 6-72
Limitations of the System
........................................................................\
.............. 6-75
Declaration of Conformity ........................................................................\
...6- 79The radio frequency components (Rear Corner Radar) complies: .....................6- 79
Safe Exit Assist (SEA) ........................................................................\
.........6-80Function settings ........................................................................\
............................ 6-81
F unction operation ........................................................................\
......................... 6-82
Function malfunction and limitations
................................................................... 6-84
Driver Attention Warning (DAW) ................................................................6-86System Setting and Operation ........................................................................\
...... 6-86
R esetting the System ........................................................................\
..................... 6-88
System Standby
........................................................................\
.............................. 6-89
System Malfunction
........................................................................\
....................... 6-89
Leading Vehicle Departure Alert
........................................................................\
... 6-91
Blind-Spot View Monitor (BVM) .................................................................6-94
Smart cruise con trol (SCC) ........................................................................\
. 6-95
Smart Cruise Control Switch ........................................................................\
......... 6-96
T o Convert to Cruise Control Mode ...................................................................... 6-96
Smart Cruise Con
trol Speed ........................................................................\
.......... 6-97
Smart Cruise Control Vehicle-to-Vehicle Distance
............................................6-103
Limitations of the System
........................................................................\
............ 6-108
Navigation-Based Smart Cruise Control ..................................................6- 112System Setting and Operation ........................................................................\
.....6- 113
Lane Following Assist (LFA) .......................................................................6- 116LFA Operation ........................................................................\
................................6- 118
Warning Message ........................................................................\
.......................... 6-118
Limitations of the System
........................................................................\
............ 6-120
6

Highway Driving Assist (HDA) ...................................................................6- 122System Setting and Operation ........................................................................\
.....6- 123
Warning Message ........................................................................\
.......................... 6-125
Rear Cross-Traffic Collision Warning (RCCW) /
Rear Cross-Traffic Collision-Avoidance Assist (RCCA)
...........................6-128
System Description ........................................................................\
....................... 6- 128
System Setting and Activation ........................................................................\
..... 6-129
Warning and System Control
........................................................................\
........ 6-131
Detecting Sensors
........................................................................\
.........................6-134
Limitations of the System
........................................................................\
............. 6-135
Special Driving Conditions ........................................................................\
6- 140Hazardous Driving Conditions ........................................................................\
....6- 140
Rocking the Vehicle ........................................................................\
..................... 6-140
Smooth Cornering
........................................................................\
......................... 6-141
Driving at Night
........................................................................\
............................. 6-141
Driving in the Rain
........................................................................\
......................... 6-141
Driving in Flooded Areas
........................................................................\
............... 6-142
Highway Driving
........................................................................\
............................ 6-142
Winter Driving ........................................................................\
....................6- 143Snow or Icy Conditions ........................................................................\
.................6-143
Win ter Precautions ........................................................................\
....................... 6-144
Vehicle load limit........................................................................\
................ 6-146
Tire Loading Information Label ........................................................................\
...6- 146
Trailer Towing ........................................................................\
......................6- 151
Lane Keeping Assist (LKA) ........................................................................\
..6-59LKA Operation ........................................................................\
................................ 6-61
LKA System Function Change ........................................................................\
....... 6-61
Warning Light and Message ........................................................................\
.......... 6-64
Limitations of the System ........................................................................\
.............. 6-65
Blind-Spot Collision Warning (BCW) /
Blind-Spot Collision-Avoidance Assist (BCA) ............................................6-67
System Description ........................................................................\
........................ 6-67
System Setting and Activation ........................................................................\
...... 6-68
Warning and System Control ........................................................................\
......... 6-70
Detecting Sensors
(Front view camera and Rear corner radar).......................................................... 6-72
Limitations of the System ........................................................................\
.............. 6-75
Declaration of Conformity ........................................................................\
...6-79The radio frequency components (Rear Corner Radar) complies: ..................... 6-79
Safe Exit Assist (SEA) ........................................................................\
.........6-80Function settings ........................................................................\
............................ 6-81
Function operation ........................................................................\
......................... 6-82
Function malfunction and limitations ................................................................... 6-84
Driver Attention Warning (DAW) ................................................................ 6-86System Setting and Operation ........................................................................\
...... 6-86
Resetting the System ........................................................................\
..................... 6-88
System Standby ........................................................................\
.............................. 6-89
System Malfunction ........................................................................\
....................... 6-89
Leading Vehicle Departure Alert ........................................................................\
... 6-91
Blind-Spot View Monitor (BVM) ................................................................. 6-94
Smart cruise control (SCC) ........................................................................\
. 6-95
Smart Cruise Control Switch ........................................................................\
......... 6-96
To Convert to Cruise Control Mode ...................................................................... 6-96
Smart Cruise Control Speed ........................................................................\
.......... 6-97
Smart Cruise Control Vehicle-to-Vehicle Distance ............................................ 6-103
Limitations of the System ........................................................................\
............ 6-108
Navigation-Based Smart Cruise Control ..................................................6-112System Setting and Operation ........................................................................\
..... 6-113
Lane Following Assist (LFA) ....................................................................... 6-116LFA Operation ........................................................................\
................................ 6-118
Warning Message ........................................................................\
.......................... 6-118
Limitations of the System ........................................................................\
............ 6-120
6
6. While Driving

6-6
Key Ignition Switch (if equipped)
WARNING
To reduce the risk of SERIOUS INJURY or
DEATH, take the following precautions:
• NEVER allow children or any person
who is unfamiliar with the vehicle to
touch the ignition switch or related
parts. Unexpected and sudden
vehicle movement can occur.
• NEVER reach through the steering
wheel for the ignition switch, or any
other control, while the vehicle is in
motion. The presence of your hand
or arm in this area may cause a loss
of vehicle control resulting in an
accident.
OAE056172L
Whenever the front door is opened, the
ignition switch will illuminate, provided
the ignition switch is not in the ON
position. The light will go off immediately
when the ignition switch is turned on or
go off after about 30 seconds when the
door is closed. (if equipped)
WARNING
NEVER turn the ignition switch to the
LOCK or ACC position while the vehicle
is in motion except in an emergency.
This will result in the engine turning
off and loss of power assist for the
steering and brake systems. This may
lead to loss of directional control and
braking function, which could cause an
accident.
Before leaving the driver's seat, always
make sure the shift button is in P (Park)
position, apply the parking brake,
and turn ignition switch to the LOCK
position.
Unexpected vehicle movement may
occur if these precautions are not
followed.
ignition Switch
LOCK ACC
ON
START
While Driving

6-20
BrAke SySteM
Power Brakes
Your vehicle has power-assisted brakes
that adjust automatically through normal
usage.
If the engine is not running or is turned
off while driving, the power assist for
the brakes will not work. You can still
stop your vehicle by applying greater
force to the brake pedal than typical.
The stopping distance, however, will be
longer than with power brakes.
When the engine is not running, the
reserve brake power is partially depleted
each time the brake pedal is applied.
Do not pump the brake pedal when the
power assist has been interrupted.
Only pump the brakes on slippery
surfaces if the power assist has been
interrupted to maintain steering control.
Do not pump the brakes on slippery
surfaces if the brakes are operating
normally.
WARNING
Take the following precautions:
• Do not drive with your foot resting
on the brake pedal. This will create
abnormal high brake temperatures,
excessive brake lining and pad wear,
and increased stopping distances.
• When descending down a long or
steep hill, move the gear shift button
to Manual Shift Mode and manually
downshift to a lower gear in order
to control your speed without using
the brake pedal excessively. Applying
the brakes continuously will cause
the brakes to overheat and could
result in a temporary loss of braking
performance.
• Wet brakes may impair the vehicle's
ability to safely slow down; the
vehicle may also pull to one side
when the brakes are applied.
Applying the brakes lightly will
indicate whether they have been
affected in this way. Always test your
brakes in this fashion after driving
through deep water. To dry the
brakes, lightly tap the brake pedal to
heat up the brakes while maintaining
a safe forward speed until brake
performance returns to normal.
Avoid driving at high speeds until the
brakes function correctly.
Disc Brakes Wear Indicator
When your brake pads are worn and new
pads are required, you will hear a high
pitched warning sound from your front
or rear brakes. You may hear this sound
come and go or it may occur whenever
you depress the brake pedal.
Note that some driving conditions or
climates may cause a brake squeal
when you first apply (or lightly apply)
the brakes. This is normal and does not
indicate a problem with your brakes.
NOTICE
To avoid costly brake repairs, do not
continue to drive with worn brake pads.
Information
Always replace brake pads as complete
front or rear axle sets.
While Driving

06
6-21
Electronic Parking Brake (EPB)
Applying the parking brake
ODN8069012
To apply the EPB (Electronic Parking
Brake):
1.
Depr
ess the brake pedal.
2.
Pull up the EPB s
witch.
Make sure the parking brake
warning light comes on.
WARNING
To reduce the risk of SERIOUS INJURY
or DEATH, do not operate the EPB
while the vehicle is moving except
in an emergency situation. It could
damage the brake system and lead to
an accident.
Releasing the parking brake
ODN8069013
To release the EPB (Electronic Parking
Brake):
• Place the ignition switch in the ON
position.
• Depress and hold the brake pedal.
• Press the EPB switch.
Make sure the Parking Brake Warning
Light goes off.
To release EPB (Electronic Parking Brake)
automatically:
• Satisfy the following conditions
1.
E
nsure seat belts are fastened
and the doors, hood and trunk are
closed.
2.
With the engine running, depr
ess
the brake pedal and shift out of P
(Park) to R (Reverse), D (Drive) or
Manual shift mode.
3.
Depr
ess the accelerator pedal.
Make sure the parking brake warning
light goes off.