maintenance schedule HYUNDAI SONATA 2021 Owner's Manual

Maintenance
8-36
A cold tire means the vehicle has
been sitting for 3 hours and driven
for less than 1 mile (1.6 km) in that 3
hour period.
Allow the tire to cool before
measuring the inflation pressure.
Always be sure the tire is cold before
inflating to the recommended
pressure.Tire Rotation
To equalize tread wear, HYUNDAI
recommends that the tires
be rotated according to the
maintenance schedule or sooner if
irregular wear develops.
During rotation, check the tires for
correct balance.
When rotating tires, check for
uneven wear and damage. Abnormal
wear is usually caused by incorrect
tire pressure, improper wheel
alignment, out-of-balance wheels,
severe braking or severe cornering.
Look for bumps or bulges in the
tread or side of the tire. Replace
the tire if you find any of these
conditions. Replace the tire if fabric
or cord is visible. After rotation, be
sure to bring the front and rear tire
pressures to specification and check
lug nut tightness (proper torque is
79~94 lbf·ft [11~13 kgf·m]).
„„Without a spare tire
ODH073802
Disc brake pads should be inspected
for wear whenever tires are rotated.

08
8-69
Cleaning the seat belt webbing
Clean the belt webbing with any
mild soap solution recommended for
cleaning upholstery or carpet. Follow
the instructions provided with the soap.
Do not bleach or re-dye the webbing
because this may weaken the seat belt.
Cleaning the interior window glass
If the interior glass surfaces of the
vehicle become hazy (that is, covered
with an oily, greasy or waxy film), they
should be cleaned with glass cleaner.
Follow the directions on the glass cleaner
container.
NOTICE
Do not scrape or scratch the inside of
the rear window. This may result in
damage to the rear window defroster
grid.
EmiSSion Control
S y
St
E m
The emission control system of your
vehicle is covered by a written limited
warranty. Please see the warranty
information contained in the Owner’s
Handbook & Warranty Information
booklet in your vehicle.
Your vehicle is equipped with an
emission control system to meet all
applicable emission regulations. There
are three emission control systems, as
follows.
(1)

Cr
ankcase emission control system
(2)

E
vaporative emission control system
(3)

Exhaus
t emission control system
In order to ensure the proper function
of the emission control systems, it
is recommended that you have your
vehicle inspected and maintained
by an authorized HYUNDAI dealer in
accordance with the maintenance
schedule in this manual.
NOTICE
For the Inspection and Maintenance
Test (with Electronic Stability Control
(ESC) system)
• To prevent the vehicle from misfiring
during dynamometer testing, turn
the Electronic Stability Control
(ESC) system off by pressing the ESC
switch (ESC OFF light illuminated).
• After dynamometer testing is
completed, turn the ESC system back
on by pressing the ESC switch again.

Index
I-6
Emission control system ........................................................................\
.............. 8-69
Crankcase emission control system

................................................................ 8-70
Evaporative emission control System


.............................................................8-70
Exhaust emission control system
.................................................................... 8-70
Engine compartment


........................................................................\
.............. 2-6, 8-3
Engine compartment panel fuse replacement


......................................................8-50
Engine coolant


........................................................................\
............................. 8-21
Engine coolant temperature gauge........................................................................\
. 4-4
Engine number


........................................................................\
............................. 2-14
Engine oil


........................................................................\
..................................... 8-19
Engine specification........................................................................\
....................... 2-7
Engine Start/Stop button


........................................................................\
................ 6-9
Evaporative emission control System


.................................................................. 8-70
Event Data Recorder (EDR)


........................................................................\
.......... 1-8
Exhaust emission control system


........................................................................\
. 8-70
Explanation of scheduled maintenance items


......................................................8-16
Exterior care........................................................................\
................................. 8-63
Exterior features........................................................................\
........................... 5-64 Hood
........................................................................\
........................................ 5-64
Trunk

........................................................................\
....................................... 5-65
Emer

gency trunk safety release....................................................................... 5-66
Fuel Filler Door


........................................................................\
....................... 5-70
Exterior overview Front view
........................................................................\
................................. 2-2
Rear view


........................................................................\
.................................. 2-3
F
Flat tire


........................................................................\
......................................... 7-12
Changing spare tire


........................................................................\
................ 7-12
Floor mat anchor(s)........................................................................\
.................... 5-151
Fluid Brake fluid


........................................................................\
............................... 8-24
Washer fluid


........................................................................\
............................ 8-25
Forward Collision-Avoidance Assist (FCA)


.......................................................6-40
FCA-Junction Turning function


...................................................................... 6-55
Forward/Reverse Parking Distance Warning (PDW)
..........................................5-99

I
I-11
LCD display modes ........................................................................\
.....................4-20
T rip computer mode

........................................................................\
................ 4-21
Turn By Turn (TBT) mode
........................................................................\
...... 4-21
Driving assist mode


........................................................................\
................. 4-21
Master warning mode


........................................................................\
.............. 4-22
User settings mode


........................................................................\
.................. 4-22
Light


........................................................................\
............................................. 5-74
AUTO headlamp position


........................................................................\
....... 5-74
Daytime running light (DRL)........................................................................\
.. 5-74
Parking lamp position


........................................................................\
............. 5-75
Headlamp position


........................................................................\
.................. 5-75
High beam operation


........................................................................\
............... 5-75
High Beam Assist (HBA)


........................................................................\
....... 5-76
Turn signals
........................................................................\
............................. 5-79
Lane change signals


........................................................................\
................ 5-79
Battery saver function
........................................................................\
............. 5-79
Headlamp delay function


........................................................................\
........ 5-79
Headlamp leveling device


........................................................................\
....... 5-80
Light bulbs


........................................................................\
................................... 8-57
Lubricants and capacities


........................................................................\
............. 2-11
Luggage compartment lamp


........................................................................\
........ 5-82
M
Maintenance Maintenance services
........................................................................\
................ 8-4
Owner maintenance


........................................................................\
................... 8-5
Scheduled maintenance services


....................................................................... 8-7
Normal maintenance schedule


.................................................................... 8-8,12
Maintenance under severe usage conditions


..............................................8-11,15
Explanation of scheduled maintenance items


.................................................8-16
Tire maintenance


........................................................................\
..................... 8-39
Maintenance services


........................................................................\
..................... 8-4

I
I-13
R
Range ........................................................................\
............................................. 4-6
Rear Cross-Traffic Collision Warning (RCCW)


................................................6-128
Rear Cross-Traffic Collision Avoidance Assist (RCCA)
...................................6-128
Rear Occupant Alert (ROA) system
.................................................................... 5-36
Rear seat adjustment
........................................................................\
.................... 3-10
Folding the rear seat


........................................................................\
................ 3-10
Rear seat head restraints
........................................................................\
.............. 3-14
Adjusting the height up and down


.................................................................. 3-14
Rear View Monitor (RVM)
........................................................................\
.......... 5-86
Recommended cold tire inflation pressures


.........................................................8-34
Recommended lubricants and capacities


.............................................................2-11
Refrigerant label


........................................................................\
.......................... 2-15
Remote key


........................................................................\
.................................... 5-4
Locking


........................................................................\
..................................... 5-4
Unlocking

........................................................................\
.................................. 5-4
T

runk unlocking

........................................................................\
........................ 5-5
Mechanical key


........................................................................\
......................... 5-5
Battery replacement


........................................................................\
.................. 5-6
Remote Smart Parking Assist (RSPA)
............................................................... 5-104
Remote start


........................................................................\
................................. 6-12
Reverse Parking Collision-Avoidance Assist (PCA)


...........................................5-89
Reverse Parking Distance Warning (PDW)
.........................................................5-95
Rocking the vehicle
........................................................................\
................... 6-140
Rotation (T

ire) ........................................................................\
............................. 8-36
S
Safe Exit Assist (SEA)
........................................................................\
................. 6-80
Function settings


........................................................................\
..................... 6-81
Function operation


........................................................................\
.................. 6-82
Function malfunction and limitations


.............................................................6-84
Safety messages
........................................................................\
............................. 1-4
Scheduled maintenance services........................................................................\
.... 8-7
Seat belt warning light Driver

’s seat ........................................................................\
............................ 3-20
Front passenger’s seat

........................................................................\
............ 3-20