engine HYUNDAI SONATA 2021 Owners Manual

Foreword
1-2
IntroductIon
Congratulations, and thank you for choosing HYUNDAI. We are pleased to welcome
you to the growing number of discerning people who drive HYUNDAIs. We are very
proud of the advanced engineering and high-quality construction of each HYUNDAI
we build.
Your Owner’s Manual will introduce you to the features and operation of your new
HYUNDAI. To become familiar with your new HYUNDAI, so that you can fully enjoy it,
read this Owner’s Manual carefully before driving your new vehicle.
This manual contains important safety information and instructions intended to
familiarize you with your vehicle’s controls and safety features so you can safely
operate your vehicle.
This manual also contains information on maintenance designed to enhance safe
operation of the vehicle. It is recommended that all service and maintenance on your
car be performed by an authorized HYUNDAI dealer. HYUNDAI dealers are prepared
to provide high-quality service, maintenance and any other assistance that may be
required.
This Owner’s Manual should be considered a permanent part of your vehicle, and
should be kept in the vehicle so you can refer to it at any time. The manual should stay
with the vehicle if you sell it to provide the next owner with important operating, safety
and maintenance information.
HyundaI Motor aMerIca
CAUTION
Severe engine and transmission damage may result from the use of poor quality
fuels and lubricants that do not meet HYUNDAI specifications. You must always use
high quality fuels and lubricants that meet the specifications listed on Page 2-11 in
the Vehicle Specifications section of the Owner’s Manual.
Copyright 2020 HYUNDAI Motor America. All rights reserved. No part of this
publication may be reproduced, stored in any retrieval system or transmitted in
any form or by any means without the prior written permission of HYUNDAI Motor
America.

01
1-3
1. What are HYUNDAI Genuine Parts?HYUNDAI Genuine Parts are the
same parts used by HYUNDAI Motor
Company to manufacture vehicles.
They are designed and tested for the
optimum safety, performance, and
reliability for our customers.2. Why Hyundai Genuine Parts?HYUNDAI Genuine Parts are
engineered and built to meet rigid
manufacturing requirements.
Damage caused by using imitation,
counterfeit or used salvage parts is
not covered under the HYUNDAI New
Vehicle Limited Warranty or any other
HYUNDAI warranty.
In addition, any damage to or failure
of HYUNDAI Genuine Parts caused
by the installation or failure of an
imitation, counterfeit or used salvage
part is not covered by any HYUNDAI
Warranty.
3. How can you tell if you are purchasing HYUNDAI Genuine Parts?
Look for the HYUNDAI Genuine Parts
Logo on the package (see below).
HYUNDAI Genuine Parts exported
to the U.S. are packaged with labels
written only in English.
HYUNDAI Genuine Parts are only
sold through authorized HYUNDAI
Dealerships.
GuIde to HyundaI GenuIne Parts

01
1-5
Your new vehicle is designed to obtain
maximum performance with UNLEADED
FUEL, as well as minimize exhaust
emissions and spark plug fouling.
Your new vehicle is designed to use only
unleaded fuel having an octane number
((R+M)/2) of 87 (Research Octane
Number 91) or higher. (Do not use
methanol blended fuels)
NOTICE
To prevent damage to the engine and
engine components, never add any fuel
system cleaning agents to the fuel tank
other than what has been specified.
Consult an authorized HYUNDAI dealer
for additional information.
WARNING
• Do not “top off” after the nozzle
automatically shuts off when
refueling.
• Always check that the fuel cap is
installed securely to prevent fuel
spillage in the event of an accident.
fuel requIreMents
Throughout this manual DANGER,
WARNING, CAUTION, NOTICE and the
SAFETY ALERT SYMBOL will be used.
This is the safety alert symbol. It
is used to alert you to potential
physical injury hazards. Obey
all safety messages that follow
this symbol to avoid possible
injury or death. The safety alert
symbol precedes the signal
words DANGER, WARNING and
CAUTION.
DANGER
DANGER indicates a hazardous
situation which, if not avoided, will
result in death or serious injury.
WARNING
WARNING indicates a hazardous
situation which, if not avoided, could
result in death or serious injury.
CAUTION
CAUTION indicates a hazardous
situation which, if not avoided, could
result in minor or moderate injury.
NOTICE
NOTICE indicates a situation which,
if not avoided, could result in vehicle
damage.

Foreword
1-6
Gasoline containing alcohol or
methanol
Gasohol, a mixture of gasoline and
ethanol (also known as grain alcohol) are
being marketed along with or instead
of leaded or unleaded gasoline. For
example, “E15” is a gasohol comprised of
15% ethanol and 85% gasoline.
Do not use gasohol containing more than
15% ethanol, and do not use gasoline or
gasohol containing any methanol. Either
of these fuels may cause drivability
problems and damage to the fuel
system, engine control system and
emission control system.
Discontinue using gasohol of any kind if
drivability problems occur.
“E85” fuel is an alternative fuel
comprised of 85 percent ethanol and 15
percent gasoline, and is manufactured
exclusively for use in Flexible Fuel
Vehicles. “E85” is not compatible with
your vehicle. Use of “E85” may result in
poor engine performance and damage
to your vehicle’s engine and fuel system.
HYUNDAI recommends that customers
do not use fuel with an ethanol content
exceeding 15 percent.
NOTICE
To prevent damage to your vehicle’s
engine and fuel system:
• Never use gasohol which contains
methanol.
• Never use gasohol containing more
than 15% ethanol.
• Never use leaded fuel or leaded
gasohol.
• Never use “E85” fuel.
Your New Vehicle Limited Warranty
does not cover damage to the fuel
system or any performance problems
caused by the use of “E85” fuel.
Using Fuel Additives (except
Detergent Fuel Additives)
Using fuel additives such as:
- Silicone fuel additiv
e
- F

errocene (iron-based) fuel additive
- Other me

tallic-based fuel additives
may result in cylinder misfire, poor
acceleration, engine stalling, damage
to the catalyst, or abnormal corrosion,
and may cause damage to the engine
resulting in a reduction in the overall life
of the powertrain.
- The Malfunction Indica

tor Lamp (MIL)
may illuminate.
NOTICE
Damage to the fuel system or
performance problem caused by the
use of these fuels or fuel additives may
not be covered by your New Vehicle
Limited Warranty.
Gasoline containing MMT
Some gasoline contains harmful
manganese-based fuel additives such
as MMT (Methylcyclopentadienyl
Manganese Tricarbonyl).
HYUNDAI does not recommend the use
of gasoline containing MMT.
This type of fuel can reduce vehicle
performance and affect your emission
control system.
The malfunction indicator lamp on the
cluster may come on.

01
1 -7
Detergent Fuel Additives
HYUNDAI recommends that you use
good quality gasolines treated with
detergent additives such as TOP TIER
Detergent Gasoline, which help prevent
deposit formation in the engine. These
gasolines will help the engine run
cleaner and enhance performance of
the Emission Control System. For more
information on TOP TIER Detergent
Gasoline, please go to the website (www.
toptiergas.com).
For customers who do not use TOP Tier
Detergent Gasoline regularly, and have
problems starting or the engine does
not run smoothly, detergent-based
fuel additives that you can purchase
separately may be added to the gasoline.
If TOP TIER Detergent Gasoline is
not available, one bottle of additive
added to the fuel tank according to the
maintenance schedule is recommended
(refer to the Maintenance Schedule in
chapter 8).
Additives are available from your
authorized HYUNDAI dealer along with
information on how to use them. Do not
mix other additives.
Operation in foreign countries
If you are going to drive your vehicle in
another country, be sure to:
• Observe all regulations regarding
registration and insurance.
• Determine that acceptable fuel is
available. •
This vehicle should not be modified.
Modification of your vehicle could
affect its performance, safety or
durability and may even violate
governmental safety and emissions
regulations.
In addition, damage or performance
problems resulting from any
modification may not be covered
under warranty.
• If you use unauthorized electronic
devices, it may cause the vehicle to
operate abnormally, wire damage,
battery discharge and fire. For your
safety, do not use unauthorized
electronic devices.
Vehicle Break-in
Pr ocess
By following a few simple precautions for
the first 600 miles (1,000 km) you may
add to the performance, economy and
life of your vehicle.
• Do not race the engine.
• While driving, keep your engine speed
(rpm, or revolutions per minute)
between 2,000 rpm and 4,000 rpm.
• Do not maintain a single speed for
long periods of time, either fast or
slow. Varying engine speed is needed
to properly break-in the engine.
• Avoid hard stops, except in
emergencies, to allow the brakes to
seat properly.
VeHIcle ModIfIcatIons

Foreword
1-8
VeHIcle data colle ct I on
and eV ent d
a
ta
r

ecorders
This vehicle is equipped with an event
data recorder (EDR). The main purpose
of an EDR is to record, in certain crash
or near crash-like situations, such as
an air bag deployment or hitting a
road obstacle, data that will assist in
understanding how a vehicle’s systems
performed. The EDR is designed to
record data related to vehicle dynamics
and safety systems for a short period of
time, typically 30 seconds or less. The
EDR in this vehicle is designed to record
such data as:
• How various systems in your vehicle
were operating;
• Whether or not the driver and
passenger safety belts were buckled/
fastened;
• How far (if at all) the driver was
depressing the accelerator and/or
brake pedal; and,
• How fast the vehicle was traveling.
This data can help provide a better
understanding of the circumstances in
which crashes and injuries occur. NOTE:
EDR data is recorded by your vehicle
only if a non-trivial crash situation
occurs; no data is recorded by the EDR
under normal driving conditions and
no personal data (e.g., name, gender,
age, and crash location) are recorded.
However, other parties, such as law
enforcement, could combine the
EDR data with the type of personally
identifying data routinely acquired
during a crash investigation.
To read data recorded by an EDR,
special equipment is required, and
access to the vehicle or the EDR is
needed. In addition to the vehicle
manufacturer, other parties, such as
law enforcement, that have the special
equipment, can read the information if
they have access to the vehicle or the
EDR.
WARNING
CALIFORNIA PROPOSITION 65
WARNING
Items contained in motor vehicles or
emitted from them are known to the
State of California to cause cancer and
birth defects or reproductive harm.
These include:
• Gasoline and its vapors
• Engine exhaust
• Used engine oil
• Interior passenger compartment
components and materials
• Component parts which are subject
to heat and wear
In addition, battery posts, terminals and
related accessories contain lead, lead
compounds and other chemicals known
to the State of California to cause
cancer and reproductive harm.
For more information go to
https://www.p65warnings.ca.gov/
passenger-vehicle

2
2. Vehicle Information
Vehicle Information
Exterior Overview ........................................................................\
..................2 -2
Interior Overview ........................................................................\
................... 2-4
Instrument Panel Overview
........................................................................\
... 2-5
Engine Compartment
........................................................................\
............ 2-6
Dimensions
........................................................................\
.............................. 2-7
Engine Specification
........................................................................\
............... 2-7
Bulb Wattage
........................................................................\
.......................... 2-8
Tires and Wheels
........................................................................\
.................... 2-9
Volume and Weight
........................................................................\
.............. 2-10
Air Conditioning System
........................................................................\
....... 2-10
Recommended Lubricants and Capacities
..................................................2-11
Recommended SAE Viscosity Number ................................................................. 2 -12
Vehicle Identification Number (VIN) ...........................................................2 -13
Vehicle Certification Label ........................................................................\
... 2-13
Tire Specification and Pressure Label
.........................................................2-14
Engine Number
........................................................................\
..................... 2-14
Refrigerant Label ........................................................................\
.................. 2-15

2-5
02
The actual shape may differ from the illustration.ODN8019005
1. Instrument cluster ..................................4-2
2.
Driv
er’s front air bag .............................3-39
3.

K
ey ignition switch/ ...............................6-6
Engine Start/Stop button
.......................6-9
4.
A

udio / Video / Navigation system..... 5-154
5.

Hazar
d warning flasher switch ...............7-2
6.

Manual clima
te control system/ ..........5-118
Automatic climate control system
.....5-127
7.
P

assenger’s front air bag ..................... 3-39
8.

Glo
ve box ............................................. 5-144
9.
T

ransmission shift button .....................6-1310.
R everse Parking Distance
Warning/ ...............................................5-95
Forward/Reverse Parking Distance
Warning system button
........................5-99
11.

Surr
ound View Monitor system button 5-88
12.

Driv
e mode integrated control system 6-37
13.

A
UTO HOLD ..........................................6-24
14.

R
emote Smart Parking Assist (RSPA)
system button
......................................5-104
instrumEnt PanEl ov E rvi E w

2-6
Vehicle Information
„„Smartstream G1.6 T-GDi
„„Smartstream G2.5 GDi
The actual engine room in the vehicle may differ from the illustration.ODN8089103/ ODN8089048L
EnginE ComPartm E nt
1. Engine coolant reservoir .......................8-21
2.
Br
ake fluid reservoir .............................8-24
3.

Air cleaner
............................................. 8-26
4.
E

ngine oil dipstick ................................ 8-195.
E ngine oil filler cap ................................
8-19
6.
Windshield w
asher fluid reservoir .......8-25
7.
F

use box ................................................8-48
8.

Ba
ttery
....................................................8-

31

02
2-7
DimEnsions
Itemsin. (mm)
Overall length 192.9 (4,900)
Overall width 73.2 (1,860)
Overall height 56.9 (1,445)
Front tread 205/65 R16
64.3 (1,633)
215/55 R17 63.9 (1,623)
235/45 R18 63.7 (1,618)
245/40 R19 63.3 (1,610)
Rear tread 205/65 R16
64.6 (1,640)
215/55 R17 64.2 (1,630)
235/45 R18 64.0 (1,625)
245/40 R19 63.6 (1,617)
Wheelbase 111.8 (2,840)
EnginE sPECifiCation
Item Smartstream G1.6 T-GDi Smartstream G2.5 GDi
Displacement cu. in. (cc) 97.08 (1,591)
152.37 (2,497)
Bore x Stroke in. (mm)3.03 x 3.06 (77 x 85.44) 3.47 x 4.00 (88.5 x 101.5)
Firing order 1-3-4-21-3-4-2
No. of cylinders 4, in-line4, in-line