2023 HYUNDAI SONATA service

Maintenance
8-70
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
SyStEm
The emission control system of your
vehicle is covered by a written limited
warranty. Please see the warranty
information contained in the Service
Passport 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) Crankcase emission control system
(2) Evaporative emission control system
(3) Exhaust 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.

I
I-3
B
Basic Troubleshooting Guide .............................................................................. 7-20
Battery ................................................................................................................. 8-36
Battery Recharging ........................................................................................... 8-37
For Best Battery Service .................................................................................. 8-36
Reset Features .................................................................................................. 8-37
Before Driving ....................................................................................................... 6-5
Before Entering the Vehicle ............................................................................... 6-5
Before Starting ................................................................................................... 6-5
Blind View Monitor (BVM) ............................................................................. 6-104
Blind-Spot Collision Warning (BCW) /
Blind-Spot Collision-Avoidance Assist (BCA) ...................................................6-77
Detecting Sensors (Front View Camera and Rear Corner Radar) ....................6-82
Limitations of the System ................................................................................ 6-85
System Description .......................................................................................... 6-77
System Setting and Activation ......................................................................... 6-78
Warning and System Control ........................................................................... 6-80
Brake Fluid .......................................................................................................... 8-29
Checking the Brake Fluid Level ....................................................................... 8-29
Brake System ....................................................................................................... 6-30
Anti-Lock Brake System (ABS) ...................................................................... 6-37
Auto Hold ......................................................................................................... 6-34
Disc Brakes Wear Indicator .............................................................................. 6-30
Electronic Parking Brake (EPB) ...................................................................... 6-31
Electronic Stability Control (ESC) ................................................................... 6-39
Good Braking Practices .................................................................................... 6-42
Hill-Start Assist Control (HAC) ....................................................................... 6-42
Power Brakes .................................................................................................... 6-30
Vehicle Stability Management (VSM) .............................................................6-41
Bulb Wattage ........................................................................................................ 2-11
C Child Restraint System (CRS) ............................................................................. 3-29
Children Always in the Rear ............................................................................ 3-29
Installing a Child Restraint System (CRS) .......................................................3-31
Selecting a Child Restraint System (CRS) .......................................................3-30
Climate Control Additional Features ................................................................. 5-130
Automatic Ventilation .................................................................................... 5-130
Sunroof Inside Air Recirculation ................................................................... 5-130

I
I-9
M Maintenance Services ............................................................................................ 8-5
Owner Maintenance Precautions ........................................................................ 8-5
Owner’s Responsibility ...................................................................................... 8-5
Manual Climate Control System ....................................................................... 5-105
Mirrors ................................................................................................................. 5-31
Inside Rearview Mirror .................................................................................... 5-31
Reverse Parking Aid Function ......................................................................... 5-41
Side View Mirrors ............................................................................................ 5-39
NNavigation-Based Smart Cruise Control ..........................................................6-122
System Setting and Operation ........................................................................ 6-123
OOwner Maintenance ............................................................................................... 8-6
Owner Maintenance Schedule ............................................................................ 8-6
PPanoramic Sunroof ............................................................................................. 5-46
Closing the Sunroof .......................................................................................... 5-48
Resetting the Sunroof ....................................................................................... 5-49
Sliding the Sunroof........................................................................................... 5-47
Sunroof Open Warning ..................................................................................... 5-49
Sunshade ........................................................................................................... 5-47
Tilting the Sunroof .......................................................................................... 5-47
R
Rear Cross-Traffic Collision Warning (RCCW) / Rear Cross-Traffic Collision-
Avoidance Assist (RCCA) ................................................................................ 6-138
Detecting Sensors ........................................................................................... 6-144
Limitations of the System .............................................................................. 6-145
System Description ........................................................................................ 6-138
System Setting and Activation ....................................................................... 6-139
Warning and System Control ......................................................................... 6-141
Rear View Monitor (RVM) .................................................................................. 5-73
Rear View Monitor - Top View ........................................................................ 5-73
Rear View Monitor with Parking Guidance .....................................................5-73

Index
I-10
Recommended Lubricants and Capacities ...........................................................2-14
Recommended SAE Viscosity Number ...........................................................2-15
Remote Smart Parking Assist (RSPA) ................................................................. 5-91
Additional Instructions ................................................................................... 5-100
Display Operation Status ................................................................................ 5-101
How Remote Smart Parking Assist System Works ..........................................5-95
How the Remote Moving Forward/Backward System Works .......................5-102
Operating Condition ......................................................................................... 5-92
Reporting Safety Defects ..................................................................................... 2-18
Reverse Parking Collision-Avoidance Assist .....................................................5-76
Detecting Sensor .............................................................................................. 5-79
Limitations of the System ................................................................................ 5-80
System Malfunction ......................................................................................... 5-80
System Setting and Operation .......................................................................... 5-76
Warning and System Control ........................................................................... 5-77
Reverse Parking Distance Warning (PDW) ........................................................5-82
Non-Operational Conditions of Reverse Parking Distance Warning System ..5-84
Operation of Reverse Parking Distance Warning System ................................5-82
Reverse Parking Distance Warning System Precautions.................................. 5-85
To Turn off Reverse Parking Distance Warning System .................................5-84
S
Safe Exit Warning (SEW) .................................................................................... 6-90
Function Malfunction and Limitations .............................................................6-94
Function Operation ........................................................................................... 6-92
Function Settings .............................................................................................. 6-91
Safety Messages..................................................................................................... 1-4 Scheduled Maintenance Services .......................................................................... 8-8
Maintenance Schedule (Smartstream G1.6 T-GDI) ...........................................8-8
Maintenance Schedule (Smartstream G2.5 GDI) .............................................8-12
Maintenance Schedule (Smartstream G2.5 T-GDI) .........................................8-16
Seat Belts ............................................................................................................. 3-19
Additional Seat Belt Safety Precautions ..........................................................3-26
Care of Seat Belts ............................................................................................. 3-28
Seat Belt Restraint System ............................................................................... 3-21
Seat Belt Safety Precautions ............................................................................ 3-19
Seat Belt Warning Light ................................................................................... 3-20

Index
I-12
Tire Specification and Pressure Label ................................................................. 2-17
Tires and Wheels ....................................................................................... 2-12/ 8-38
All Season Tires ............................................................................................... 8-48
Check Tire Inflation Pressure ........................................................................... 8-39
Radial-Ply Tires ................................................................................................ 8-48
Recommended Cold Tire Inflation Pressures ...................................................8-38
Snow Tires ........................................................................................................ 8-48
Summer Tires ................................................................................................... 8-48
Tire Care ........................................................................................................... 8-38
Tire Maintenance .............................................................................................. 8-42
Tire Replacement ............................................................................................. 8-41
Tire Rotation ..................................................................................................... 8-40
Tire Sidewall Labeling ..................................................................................... 8-42
Tire Terminology and Definitions .................................................................... 8-45
Tire Traction ..................................................................................................... 8-42
Wheel Alignment and Tire Balance ................................................................. 8-40
Wheel Replacement .......................................................................................... 8-42
Towing ................................................................................................................. 7-18
Emergency Towing .......................................................................................... 7-19
Towing Service ................................................................................................. 7-18
Trailer Towing ................................................................................................... 6-161
If you Have a Flat Tire While Driving ...............................................................7-3
V
Vehicle Break-In Process ....................................................................................... 1-7
Vehicle Certification Label .................................................................................. 2-16
Vehicle Data Collection and Event Data Recorders ..............................................1-8
Vehicle Identification Number (VIN) .................................................................. 2-16
Vehicle Load Limit ............................................................................................ 6-156
Tire Loading Information Label ..................................................................... 6-156
Vehicle Modifications ............................................................................................ 1-7
Volume and Weight .............................................................................................. 2-13
W
Washer Fluid ........................................................................................................ 8-30
Checking the Washer Fluid Level .................................................................... 8-30
Windows .............................................................................................................. 5-42
Power Windows ................................................................................................ 5-43