2021 HYUNDAI SONATA trunk

3-10
Rear Seats
Folding the rear seat
The rear seatbacks can be folded to
facilitate carrying long items or to
increase the luggage capacity of the
vehicle.
WARNING
• Never allow passengers to sit on top
of the folded down seatback while
the vehicle is moving. This is not a
proper seating position and no seat
belts are available for use. This could
result in serious injury or death in
case of an accident or sudden stop.
• Objects carried on the folded down
seatback should not extend higher
than the top of the front seatbacks.
This could allow cargo to slide
forward and cause injury or damage
during sudden stops.
To fold down the rear seatback:
1.

Se
t the front seatback to the upright
position and if necessary, slide the
front seat forward.
ODN8039062L
2. Lower the rear head restraints to the lowest position by pushing and
holding the release button and
pushing down on the head restraint.
ODN8039063L
3. Pull on the sea tback folding lever
located in the trunk.
ODN8039064L
4. Fold the seatback toward the front of the vehicle.
5.

T
o use the rear seat, lift and pull the
seatback rearward. Pull the seatback
firmly until it clicks into place. Make
sure the seatback is locked in place.
Seats & Safety System

04
4-17
Door, Hood, Trunk Open Indicator
ODN8049012
This warning is displayed if any door or
the hood or the liftgate is left open. The
warning will indicate which door is open
in the display.
CAUTION
Before driving the vehicle, you should
confirm that the door/hood/liftgate
is fully closed. Also, check there is no
door/hood/liftgate open warning light
or message displayed on the instrument
cluster.
Sunroof Open (if equipped)
ODN8049013
This warning is displayed if you turn off
the engine when the sunroof is open.
Close the sunroof securely before leaving
your vehicle.
Low Pressure
ODN8049019L
This warning message is displayed if the
tire pressure is low. The corresponding
tire on the vehicle will be illuminated.
For more information, refer to "Tire
Pressure Monitoring System (TPMS)" in
chapter 7.
Lights Mode
OIK047145L
This indicator displays which exterior
light is selected using the lighting
control.

04
4-27
3. Door
ItemsExplanation
Auto Lock •
Disable : The auto door lock operation will be deactivated.
•
E

nable on Speed: All doors will be automatically locked when the
vehicle speed exceeds 9 mph (15 km/h).
•
E

nable on Shift: All doors will be automatically locked if the
automatic transmission shift button is pressed from the P (Park)
position to the R (Reverse), N (Neutral), or D (Drive) position. (Only
when the engine is running.)
Auto Unlock •
Disable : The aut

o door unlock operation will be canceled.
•
On k

ey out/Vehicle Off : All doors will be automatically unlocked
when the ignition key is removed from the ignition switch or the
Engine Start/Stop button is set to the OFF position.
•
On Shift t

o P: All doors will be automatically unlocked if the
automatic transmission shift button is pressed to P (Park) position.
(Only when the engine is running.)
Two Press Unlock •
Off: The tw

o press unlock function will be deactivated. Therefore,
all doors will unlock if the door unlock button is pressed.
•
On: Only the driv

er’s door will unlock if the door unlock button is
pressed. When the door unlock button is pressed again within 4
seconds, the remaining doors will unlock.
Horn Feedback To activate or deactivate the horn feedback.
If the horn feedback is activated, after locking the door by pressing
the lock button on the remote key, and pressing it again within 4
seconds, the horn feedback sound will operate once to indicate that
all doors are locked (if equipped with remote key).
Smart Trunk To activate or deactivate the smart trunk.
For more information, refer to “Smart trunk” in chapter 5.
4. Lights
Items
Explanation
One Touch Turn
Signal •
Off: The one touch turn signal function will be deactivated.
•
3, 5, 7 Flashes: The turn signal indica

tor will blink 3, 5, or 7 times
when the turn signal lever is moved slightly.
For more information, refer to “Lighting” in chapter 5.
Ambient Light
Brightness To adjust the brightness of the ambient light.
Ambient Light Color To select the ambient light color.
Headlight Delay •
To activate or deactivate the headlamp delay function.
For more information, refer to “Lighting” in chapter 5.
High Beam Assist •
To activate or deactivate the High Beam Assist (HBA) function.
For more information, refer to “High Beam Assist (HBA)” in
chapter 5.

Instrument Cluster
4-42
3. Door
ItemsExplanation
Auto Lock •
Disable : The auto door lock operation will be deactivated.
•

E
nable on Speed: All doors will be automatically locked when the
v

ehicle speed exceeds 9 mph (15 km/h).
•

E
nable on Shift: All doors will be automatically locked if the
aut

omatic transmission shift button is pressed from the P (Park)
position to the R (Reverse), N (Neutral), or D (Drive) position. (Only
when the engine is running.)
Auto Unlock •

Disable
: The auto door unlock operation will be canceled.
•

On
key out/Vehicle Off : All doors will be automatically unlocked
when the ignition k

ey is removed from the ignition switch or the
Engine Start/Stop button is set to the OFF position.
•

On
Shift to P: All doors will be automatically unlocked if the
aut

omatic transmission shift button is pressed to P (Park) position.
(Only when the engine is running.)
Two Press Unlock •

Off:
The two press unlock function will be deactivated. Therefore,
all door

s will unlock if the door unlock button is pressed.
•

On:
Only the driver’s door will unlock if the door unlock button is
pr

essed. When the door unlock button is pressed again within 4
seconds, the remaining doors will unlock.
Horn Feedback To activate or deactivate the horn feedback.
If the horn feedback is activated, after locking the door by pressing
the lock button on the remote key, and pressing it again within 4
seconds, the horn feedback sound will operate once to indicate that
all doors are locked (if equipped with remote key).
Smart Trunk To activate or deactivate the smart trunk.
For more information, refer to “Smart trunk” in chapter 5.
4. Lights
Items
Explanation
One Touch Turn
Signal •
Off: The one touch turn signal function will be deactivated.
•

3,
5, 7 Flashes: The turn signal indicator will blink 3, 5, or 7 times
when the turn signal le

ver is moved slightly.
For more information, refer to “Lighting” in chapter 5.
Ambient Light
Brightness To adjust the brightness of the ambient light.
Ambient Light Color To select the ambient light color.
Headlight Delay •
To activate or deactivate the headlamp delay function.
For more information, refer to “Lighting” in chapter 5.
High Beam Assist •
To activate or deactivate the High Beam Assist (HBA) function.
For more information, refer to “High Beam Assist (HBA)” in chapter 5.

5. Convenient Features
Convenient Features
Accessing Your Vehicle ........................................................................\
..........5-4Remote Key ........................................................................\
...................................... 5-4
Smart K ey ........................................................................\
.......................................... 5 -7
Immobilizer System
........................................................................\
........................ 5-14
Hyundai Digital Key
........................................................................\
......................... 5-15
Door Locks ........................................................................\
............................. 5- 31Operating Door Locks from Outside the Vehicle ..................................................5- 31
Operating Door Locks from Inside the Vehicle ....................................................5-32
Automatic Door Lock and Unlock Features
..........................................................5-34
Child-Protector Rear Door Locks

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

35
Rear Occupant Alert (ROA) System
....................................................................... 5-36
Vehicle Auto-Shut Off Function

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

37
Theft-Alarm System ........................................................................\
.............5- 38
Driver Position Memory System ................................................................. 5-39
Storing Positions into Memory ........................................................................\
..... 5- 39
Recalling Positions from Memory ........................................................................\
. 5-40
R
esetting the Driver’s Seat Memory System ........................................................5-40
Easy Access Function
........................................................................\
...................... 5-41
Steering Wheel ........................................................................\
.....................5-42Electric Power Steering (EPS) ........................................................................\
........5-42
Tilt S teering / Telescope Steering ........................................................................\
. 5-43
H
eated Steering Wheel ........................................................................\
.................. 5-44
Horn........................................................................\
................................................. 5-45
Mirrors ........................................................................\
.................................. 5-46Inside Rearview Mirror ........................................................................\
...................5-46
Side Vie w Mirrors ........................................................................\
........................... 5-53
Reverse Parking Aid Function

........................................................................\
........ 5-55
Windows ........................................................................\
............................... 5-56Power Windows ........................................................................\
..............................5-57
Panoramic Sunroof ........................................................................\
..............5-60Sunshade ........................................................................\
......................................... 5-61
Sliding the Sunr oof ........................................................................\
.......................... 5-61
Tilting the Sunroof
........................................................................\
.......................... 5-61
Closing the Sunroof
........................................................................\
....................... 5-62
Resetting the Sunroof
........................................................................\
.................... 5-63
Sunroof Open Warning
........................................................................\
.................. 5-63
Exterior Features ........................................................................\
..................5-64Hood ........................................................................\
................................................ 5-64
T runk ........................................................................\
................................................ 5-65
Emergency Trunk Safety Release
........................................................................\
.. 5-66
Fuel Filler Door
........................................................................\
............................... 5-70
5

Convenient Features
5-4
Remote Key (if equipped)
OIG046001
Your HYUNDAI uses a remote key, which
you can use to lock or unlock the driver
and passenger doors or the rear trunk.
(1)
Door L
ock
(2)

Door Unlock
(3

)
T
runk Unlock
(4)
P

anic
Locking your vehicle
To lock your vehicle:
1.
Mak
e sure all doors, the engine hood
and the trunk are closed.
2.

Pr
ess the Door Lock button (1) on the
remote key to lock all doors.
3.

If the Door L
ock button (1) is pressed
once more within four seconds, the
horn will beep once and the hazard
warning lights will blink.
4.
Mak

e sure the doors are locked by
checking the position of the door lock
button inside the vehicle.
WARNING
Do not leave the keys in your
vehicle with unsupervised children.
Unattended children could place the
key in the ignition switch and may
operate power windows or other
controls, or even make the vehicle
move, which could result in serious
injury or death.
Unlocking your vehicle
To unlock your vehicle:
1.

Pr
ess the Door Unlock button (2) on
the remote key.
2.

The driv
er’s door will unlock. The
hazard warning lights will blink two
times.
• Two press unlock setting:
If you press the Door Unlock button
on the remote key again within
four seconds, then all the doors will
unlock.
Two press unlock setting can be
changed according to owner’s
preference in the cluster User Settings
mode or with the remote key.
• User settings mode method:
Select or deselect the ‘Two Press
Unlock’ feature in the User Settings
mode on the cluster LCD display (User
Settings
→ Door → Two Press Unlock).
Information
After unlocking the doors, the doors will
automatically relock after 30 seconds
unless a door is opened.
Accessing Your Vehicle

05
5-5
Trunk unlocking
To unlock the trunk :
1.
Pr
ess and hold the Trunk Unlock
button (3) on the remote key for more
than one second.
2.

The hazar
d warning lights will blink
two times and the trunk will be
unlocked.
3.

Once the trunk is opened and then
closed, the trunk will aut

omatically
re-lock after 30 seconds.
Information
The word “HOLD” is written on the
button to inform you that you must press
and hold the button for more than one
second.
Panic button (4)
Press and hold the Panic button (4) for
more than one second. The horn sounds
and hazard warning lights flash for about
30 seconds.
To cancel the panic mode, press any
button on the remote key.
Start-up
For information, refer to the “Key
Ignition Switch” section in chapter 6.
NOTICE
To prevent damaging the remote key:
• Keep the remote key away from
water or any liquid and fire. Internal
circuits may malfunction if the inside
of the remote key gets damp (from
liquids or moisture) or if it is heated.
This can exclude the remote key from
being covered under warranty.
• Avoid dropping or throwing the
remote key.
• Protect the remote key from extreme
temperatures.
Mechanical key
OIG046004
If the remote key does not operate
normally, you can lock or unlock the
driver’s door by using the mechanical
key.
To unfold the mechanical key, press the
release button on the remote.
To return the key to its stored position,
press the release button and fold the key
back into the remote.
Remote key precautions
The remote key will not work if any of the
following occur:
• The key is in the ignition switch.
• You exceed the operating distance
limit (about 90 feet [30 m]).
• The remote key battery is weak.
• Other vehicles or objects may be
blocking the signal.
• The weather is extremely cold.
• The remote key is close to a radio
transmitter such as a radio station or
an airport which can interfere with
normal operation of the remote key.
If the remote key does not work
correctly, open and close the door
with the mechanical key. If you have a
problem with the remote key contact an
authorized HYUNDAI dealer.

05
5 -7
Smart Key (if equipped)
„„Type A
ODN8059006
„„Type B
ODN8059007
Your HYUNDAI uses a smart key, which
you can use to lock or unlock a door (and
trunk) and even start the engine even just
carrying the key.
(1)
Door L
ock
(2)

Door Unlock
(3

)
T
runk Open
(4)
P

anic
(5)

R
emote Smart Parking Assist
(rearward)
(6)

R
emote Smart Parking Assist
(forward)
(7)

R
emote Start
Locking your vehicle (Button type)
ODN8059001
1. Close all o f the doors, the hood and
the trunk.
2.

Mak
e sure you have the smart key in
your possession and press either the
button on the door handle or the Door
Lock button (1) on the smart key.
3.

The door
s, the hood and the trunk are
locked. The chime will sound once
and the hazard warning lights will
blink.
• The door handle button will only
operate when the smart key is within
28~40 inches (0.7~1 m) from the
outside door handle.
• Make sure the doors are locked by
pulling the door handle.