2021 HYUNDAI SONATA HYBRID boot

While Driving
6-8
Starting the engine
WARNING
• Always wear appropriate shoes when
operating your vehicle.
Unsuitable shoes, such as high heels,
ski boots, sandals, flip-flops, etc.,
may interfere with your ability to use
the brake and accelerator pedals.
• Do not start the vehicle with the
accelerator pedal depressed. The
vehicle can move and lead to an
accident.
• Wait until the engine rpm is normal.
The vehicle may suddenly move if
the brake pedal is released when the
rpm is high.
Information
• The engine will start by pressing the
Engine Start/Stop button, only when
the smart key is in the vehicle.
• Even if the smart key is in the vehicle,
if it is far away from the driver, the
engine may not start.
• When the Engine Start/Stop button
is in the ACC or ON position, if any
door is open, the system checks for the
smart key. If the smart key is not in the
vehicle, the “
” indicator will blink
and the warning "Key not in vehicle"
will come on and if all doors are closed,
the chime will also sound for about
5 seconds. Keep the smart key in the
vehicle when using the ACC position or
if the vehicle engine is ON.
1. Always carry the smart key with you.
2. Make sure the parking brake is
applied.
3. Make sure the gear is in P (Park).
4. Depress the brake pedal.
5. Press the Engine Start/Stop button. If
the vehicle starts, the “” indicator
will come on.
Information
• Do not wait for the engine to warm up
while the vehicle remains stationary.
Start driving at moderate engine
speeds. (Aggressive accelerating and
decelerating should be avoided.)
• Always start the vehicle with your foot
on the brake pedal. Do not depress the
accelerator while starting the vehicle.
Do not rev the engine while warming
it up.
• If ambient temperature is low,
the “
” indicator may remain
illuminated longer than the normal
amount of time.
NOTICE
To prevent damage to the vehicle:
• If the “
” indicator turns off while
you are in motion, do not attempt to
move the shift button to the P (Park)
position.
• Do not push or tow your vehicle to
start the engine.

06
6-73
„„Type A„„Type B
OTM058087LODN8059289L
Check Blind-Spot Collision-Avoidance
Assist (BCA) system
If there is a problem with BCA system,
a warning message will appear. The
system will turn off automatically. BCW
will still operate even if BCA system turns
off due to malfunction. Have the vehicle
inspected by an authorized HYUNDAI
dealer.
Limitations of the System
The driver must be cautious in the below
situations, because the system may not
detect other vehicles or objects in certain
circumstances.
• The system may not work around 15
seconds after starting the vehicle or
the initialization or rebooting of the
front view camera.
• When a trailer or carrier is installed.
• The vehicle drives in inclement
weather such as heavy rain or snow.
• The sensors are polluted with rain,
snow, mud, etc.
• The rear bumper where the sensors
are located is covered with a foreign
object such as a bumper sticker, a
bumper guard, a bike rack, etc.
• The rear bumper is damaged, or the
sensor is out of the original default
position.
• The vehicle height gets lower or
higher due to heavy loading in a trunk,
abnormal tire pressure, etc.
• When the temperature of the rear
bumper is high.
• When the sensors are blocked by
other vehicles, walls or parking-lot
pillars.
• The vehicle drives on a curved road.
• The vehicle drives through a tollgate.
• The road pavement (or the peripheral
ground) abnormally contains metallic
components (i.e. possibly due to
subway construction).
• There is a fixed object near the
vehicle, such as a guardrail.

06
6-83
Leading Vehicle Departure Alert
After the vehicle in front departs an alert
informs the driver.
System setting
With the engine ON, Leading Vehicle
Departure Alert function turns on and
gets ready to be activated when the
‘User Settings → Driver Assistance → Driver Attention Warning → Leading Vehicle Departure Alert’ is selected on
the cluster. The function stops operation
when the setting is deactivated.
However, if the engine is turned off then
on again, the function maintains the
previous state.
Operating conditions
ODN8059263L
After the vehicle in front departs, the
message is displayed on the cluster with
the alarm.
WARNING
• Leading Vehicle Departure Alert
function only assists the driver
and the function may not sound
the alarm even the vehicle in front
departs.
• Even though the function allows the
driver to recognize the departure of
the vehicle in front, the driver should
always be aware of the surroundings
and operate the vehicle.
CAUTION
• Leading Vehicle Departure Alert
function is using the front view
camera. To optimize the function
of the front view camera, the driver
should manage carefully. For
detailed information, please refer
to the warning statements in Lane
Keeping Assist system section.
• Leading Vehicle Departure Alert
function will not be in the ENABLED
state when:
-The vehicle stops on a speed bump
or on a slope.
-The vehicle stops during turning
right or driving on a curve.
-The function may not work
around 15 seconds after starting
the vehicle or the initialization
or rebooting of the front view
camera.

08
8-9
Normal Maintenance Schedule (CONT.)
MAINTENANCE

INTERVALS
MAINTENANCE
ITEM Number of months or driving distance, whichever comes first
Months 1224 3648 60 7284 96108 120 132144 156168 180
Miles 7. 51522.5 3037.5 4552.5 6067.5 7583 90 98105 113
Km 1224 3648 60 7284 96108 120 132144 156168 180
Battery condition IIIIIIIIIIIIIII
Brake lines, hoses and connections IIIIIIIIIIIIIII
Brake hoses and lines IIIIIIIIIIIIIII
Disc brakes and pads IIIIIIIIIIIIIII
Steering gear rack, linkage and boots IIIIIIIIIIIIIIIDriveshaft and boots IIIIIIIIIIIIIII
Suspension mounting bolts IIIIIIIIIIIIIII
Air conditioner refrigerant IIIIIIIIIIIIIII
Air conditioner compressor IIIIIIIIIIIIIII
Exhaust pipe and muffler IIIIIII
Automatic transmission fluid No check, No service required
Vapor hose, fuel filler cap and fuel tank IIII : Inspect and if necessary, adjust, correct, clean or replace.
R : Replace or change.

Maintenance
8-12
Maintenance ItemMaintenance
operation Maintenance Intervals Driving
condition
Rear brake disc/pads IMore frequently C, D, G, F
Steering gear box,
linkage & boots/ lower
arm ball joint, upper arm
ball joint I
More frequently C, D, E, F, G,
H, I
Drive shafts and boots IEvery 7,500 miles (12,000 km) or
6 months C, D, E, F,
G, H, I, J
Automatic transmission
fluid R
Every 60,000 miles (96,000 km) A, C, D, E, F,

G, H, I, K
Parking brake IMore frequently C, D, G, H
Severe driving conditions
A. Repeatedly driving short distance of less than 5 miles (8 km) in normal temperature
or less than 10 miles (16 km) in freezing temperature
B. Extensive engine idling or low speed driving for long distances
C. Driving on rough, dusty, muddy, unpaved, graveled or saltspread roads
D. Driving in areas using salt or other corrosive materials or in very cold weather
E. Driving in sandy areas
F. Driving in heavy traffic area over 90°F (32°C)
G. Driving on uphill, downhill, or mountain road
H. Towing a Trailer, or using a camper, or roof rack
I. Driving as a patrol car, taxi, other commercial use or vehicle towing
J. Driving over 106 mph (170 km/h)
K. Frequently driving in stop-and-go conditions

Maintenance
8-14
Information
Automatic transmission fluid color is red
when new.
As the vehicle is driven, the automatic
transmission fluid will begin to look
darker. This is a normal condition and you
should not judge the need to replace the
fluid based upon the changed color.
NOTICE
The use of a non-specified fluid could
result in transmission malfunction
and failure. Use only the specified
automatic transmission fluid (refer
to “Recommended Lubricants and
Capacities” in chapter 2).
Engine Clutch Actuator Fluid
The engine clutch actuator fluid level
should be inspected or replaced to the
intervals specified in the maintenance
schedule.
Brake Hoses and Lines
Visually check for proper installation,
chafing, cracks, deterioration and any
leakage. Replace any deteriorated or
damaged parts immediately.
Brake Fluid
Check the brake fluid level in the brake
fluid reservoir. The level should be
between the MIN and the MAX marks
on the side of the reservoir. Use only
hydraulic brake fluid conforming to DOT
4 specification.
Parking Brake
Inspect the parking brake system.
Brake Discs, Pads, Calipers and
Rotors
Check the pads, the disc, and the rotor
for any excessive wear-out. Inspect
calipers for any fluid leakage
Exhaust Pipe and Muffler
Visually inspect the exhaust pipes,
muffler and hangers for cracks,
deterioration, or damage. Start
the engine and listen carefully for
any exhaust gas leakage. Tighten
connections or replace parts as
necessary.
Suspension Mounting Bolts
Check the suspension connections for
looseness or damage. Retighten to the
specified torque.
Steering Gear Box, Linkage &
Boots/Lower Arm Ball Joint
With the vehicle stopped and the hybrid
system off, check for excessive free-play
in the steering wheel. Check the linkage
for bends or damage. Check the dust
boots and ball joints for deterioration,
cracks, or damage.
Replace any damaged parts.
Drive Shafts and Boots
Check the drive shafts, boots and clamps
for cracks, deterioration, or damage.
Replace any damaged parts and, if
necessary, repack the grease.
Air Conditioning Refrigerant
Check the air conditioning lines and
connections for leakage and damage.

Maintenance
8-50
Exterior Care
Exterior general caution
It is very important to follow the label
directions when using any chemical
cleaner or polish. Read all warning and
caution statements that appear on the
label.
Finish maintenance
Washing
To help protect your vehicle’s finish from
rust and deterioration, wash it thoroughly
and frequently at least once a month
with lukewarm or cold water.
If you use your vehicle for off-road
driving, you should wash it after each
off-road trip. Pay special attention to the
removal of any accumulation of salt, dirt,
mud, and other foreign materials. Make
sure the drain holes in the lower edges
of the doors and rocker panels are kept
clear and clean.
Insects, tar, tree sap, bird droppings,
industrial pollution and similar deposits
can damage your vehicle’s finish if not
removed immediately.
Even prompt washing with plain water
may not completely remove all these
deposits. A mild soap, safe for use on
painted surfaces, should be used.
After washing, rinse the vehicle
thoroughly with lukewarm or cold water.
Do not allow soap to dry on the finish.
High-pressure washing
• When using high-pressure washers,
make sure to maintain sufficient
distance from the vehicle.
Insufficient clearance or excessive
pressure can lead to component
damage or water penetration.
• Do not spray the camera, sensors or
its surrounding area directly with a
high pressure washer. Shock applied
from high pressure water may cause
the device to not operate normally.
• Do not bring the nozzle tip close to
boots (rubber or plastic covers) or
connectors as they may be damaged
if they come into contact with high
pressure water.
WARNING
After washing the vehicle, test the
brakes while driving slowly to see
if they have been affected by water
before getting on the road. If braking
performance is impaired, dry the
brakes by applying them lightly while
maintaining a slow forward speed.
NOTICE
• Do not use strong soap, chemical
detergents or hot water, and do not
wash the vehicle in direct sunlight
or when the body of the vehicle is
warm.
• Be careful when washing the side
windows of your vehicle.
• Especially, with high-pressure water,
water may leak through the windows
and wet the interior.
• To prevent damage to the plastic
parts, do not clean with chemical
solvents or strong detergents.
• To prevent damage to the charging
door, make sure to close and lock the
vehicle doors when washing (high-
pressure washing, automatic car
washing, etc.) the vehicle.
APPEARANCE CARE