2023 HYUNDAI NEXO service schedule

5-123
Driving your vehicle
5
Winter Precautions
Use high quality ethylene glycolcoolant
Your vehicle is delivered with high
quality ethylene glycol coolant in the
cooling system. It is the only type ofcoolant that should be used because
it helps prevent corrosion in the cool-
ing system, lubricates the water
pump and prevents freezing. Be sure
to replace or replenish your coolantin accordance with the maintenance
schedule in chapter 7. Before winter,
have your coolant tested to assure
that its freezing point is sufficient for
the temperatures anticipated during
the winter.
Change to "winter weight" oil ifnecessary
In some climates it is recommended
that a lower viscosity "winter weight"
oil be used during cold weather. See
chapter 8 for recommendations. If
you aren't sure what weight oil you
should use, consult an authorized
HYUNDAI dealer.
Check battery and cables
Winter puts additional burdens on
the battery system. Visually inspect
the battery and cables as described
in chapter 7. The level of charge in
your battery can be checked by an
authorized HYUNDAI dealer or a
service station.
Use approved window washeranti-freeze in system
To keep the water in the window
washer system from freezing, add an
approved window washer anti-freeze
solution in accordance with instruc-
tions on the container. Window wash-
er anti-freeze is available from an
authorized HYUNDAI dealer and
most auto parts outlets. Do not use
coolant or other types of anti-freeze
as these may damage the paint fin-ish.
Do not let your parking brake
freeze
Under some conditions your parking
brake can freeze in the engaged
position. This is most likely to happen
when there is an accumulation of
snow or ice around or near the rear
brakes or if the brakes are wet. If
there is a risk the parking brake may
freeze, apply it only temporarily while
you shift to P (Park) and block therear wheels so the car cannot roll.
Then release the parking brake.

7
Maintenance
7
Maintenance
Fuel Cell Power Module Compartment ...............7-3
Maintenance Services ...........................................7-4Owner's Responsibility .....................................................7-4
Owner Maintenance Precautions..................................7-4
Owner Maintenance ..............................................7-5 Owner Maintenance Schedule .......................................7-6
Scheduled Maintenance Services........................7-7 Normal Maintenance Schedule ......................................7-8
Maintenance Under Severe Usage Conditions ........7-10
Explanation of Scheduled Maintenance Items ..7-12
Device Cooling Coolant .......................................7-13 Checking the Coolant Level ..........................................7-13
Changing Coolant ............................................................7-15
Stack Cooling Coolant .........................................7-16 Checking the Coolant Level ..........................................7-16
Changing Coolant ............................................................7-18
Brake Fluid ............................................................7-19 Checking the Brake Fluid Level ...................................7-19
Washer Fluid .........................................................7-20 Checking the Washer Fluid Level................................7-20
Air Cleaner ............................................................7-20 Filter Replacement ..........................................................7-20
Climate Control Air Filter ....................................7-22 Filter Inspection ...............................................................7-22 Wiper Blades.........................................................7-24
Blade Inspection ..............................................................7-24
Blade Replacement .........................................................7-24
12V Battery ...........................................................7-27 Battery Recharging ........................................................7-28
Reset Features.................................................................7-28
Tires and Wheels .................................................7-29 Tire Care ............................................................................7-29
Recommended Cold Tire Inflation Pressures ...........7-30
Check Tire Inflation Pressure ......................................7-31
Tire Rotation.....................................................................7-32
Wheel Alignment and Tire Balance ............................7-33
Tire Replacement ............................................................7-33
Wheel Replacement ........................................................7-34
Tire Traction .....................................................................7-34
Tire Maintenance ............................................................7-34
Tire Sidewall Labeling ....................................................7-34
Tire Terminology and Definitions................................7-38
All Season Tires ...............................................................7-42
Summer Tires ...................................................................7-42
Snow Tires ........................................................................7-42
Radial-Ply Tires ...............................................................7-42
Low Aspect Ratio Tires..................................................7-43
7

7-4
MaintenanceM
M AAIINN TTEENN AANN CCEE SS EE RR VV IICC EE SS
You should exercise the utmost care
to prevent damage to your vehicle
and injury to yourself whenever per-
forming any maintenance or inspec-
tion procedures.
We recommend you have your vehi-
cle maintained and repaired by an
authorized HYUNDAI dealer. An
authorized HYUNDAI dealer meets
HYUNDAI's high service quality
standards and receives technical
support from HYUNDAI in order to
provide you with a high level of serv-
ice satisfaction.Owner's Responsibility
Maintenance service and record
retention are the owner's responsibil-
ity.
You should retain documents that
show proper maintenance has been
performed on your vehicle in accor-dance with the scheduled mainte-
nance service charts shown on the
following pages. You need this infor-
mation to establish your compliance
with the servicing and maintenance
requirements of your vehicle war-
ranties.
Detailed warranty information is pro-
vided in your Service Passport. Repairs and adjustments required as a result of improper maintenance or
a lack of required maintenance are
not covered.
Owner Maintenance Precautions
Inadequate, incomplete or insuffi-
cient servicing may result in opera-
tional problems with your vehicle that
could lead to vehicle damage, an
accident, or personal injury. This
chapter provides instructions only forthe maintenance items that are easy
to perform. Several procedures can
be done only by an authorized
HYUNDAI dealer with special tools.
Your vehicle should not be modified
in any way. Such modifications may
adversely affect the performance,
safety or durability of your vehicle
and may, in addition, violate condi-
tions of the limited warranties cover-
ing the vehicle.
High voltage caution
Do not disassemble or perform maintenance on the fuel cell
system unless you are quali-
fied. The fuel cell system can be
highly dangerous since there
are many high voltage parts
inside even if when power is off.
WARNING

7-8
Maintenance
Normal Maintenance Schedule
Months1224364860728496108120132144156168180
Miles×1,00061218243036424854606672788490
Km×1,000102030405060708090100110120130140150
Hydrogen system
(Check the hydrogen leakage)Inspect every 10,000 km (6,000 miles) or 24 months
Air cleaner filterReplace every at 20,000 km (12,000) miles
Device cooling coolantAt first, replace at 200,000 km (120,000 miles) or 10 years :
Thereafter, replace every 48,000 km (30,000 miles) or 24 months
Stack cooling coolantReplace every at 60,000 km (36,000 miles) or 36 months
Ion filterReplace every at 60,000 km (36,000 miles) or 36 months
Reduction gearNo check, No service required
Air conditioner refrigerant/ compressorIIIIIIIIIIIIIII
Cooling system hoses and connec- tions IIIIIIIIIIIIIII
Brake lines, hoses and connections (including booster)IIIIIIIIIIIIIII
Clutch (if equipped) and brake
pedal free playIIIIIIIIIIIIIII
Brake discs and padsIIIIIIIIIIIIIII
Driveshaft and bootsIIIIIII
Front suspension ball jointsIIIIIIIIIIIIIII
Maintenance Intervals
Maintenance Item
I : Inspect and if necessary, adjust, correct, clean or replace.
R : Replace

I-7
LCD Display Modes .......................................................3-82
Leading Vehicle Departure Alert ..................................5-116
System Setting and Activation .................................5-116
Light Bulbs .....................................................................7-57 Daytime Running Lamp Replacement .......................7-58
Front Center Lamp Replacement ...............................7-58
Headlamp Replacement..............................................7-58
High Mounted Stop Lamp..........................................7-59
Interior Light Bulb Replacement ...............................7-60
License Plate Light Bulb Replacement ......................7-60
Parking Lamp Replacement .......................................7-58
Rear Combination Light Bulb Replacement ..............7-59
Side Marker Replacement ..........................................7-58
Side Repeater Lamp Replacement .............................7-58
Turn Signal Lamp Replacement.................................7-58
Lighting ...........................................................................3-89 Exterior Lights............................................................3-89
Interior Lights.............................................................3-96
Welcome System ........................................................3-99
Luggage Net Holder .....................................................3-173 Maintenance Services .......................................................7-4
Owner Maintenance Precautions..................................7-4
Owner's Responsibility.................................................7-4
Mirrors ............................................................................3-23
Inside Rearview Mirror ..............................................3-23
Side View Mirrors ......................................................3-30
Occupant Classification System (OCS)..........................2-58
Owner Maintenance ..........................................................7-5 Owner Maintenance Schedule......................................7-6
Paddle Shifter (Regenerative Braking Control) .............5-17
Parking Distance Warning (Reverse/Forward) System .......................................................................3-105
Passenger's front air bag .................................................2-49
Power Button ....................................................................5-6 POWER Button Positions ............................................5-7
Starting the Vehicle ......................................................5-9
Turning Off the Vehicle..............................................5-10
Power Outlet .................................................................3-166
Power Tailgate ................................................................3-45
I
Index
M
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P

I-8
Rear Cross-traffic Collision Warning (RCCW)/
Rear Cross-traffic Collision-Avoidance Assist
(RCCA)........................................................................5-67
Limitations of the System ..........................................5-73
System Description ....................................................5-67
System Setting and Activation ...................................5-68
Warning and System Control .....................................5-69
Rear seat warmers ...........................................................2-20
Rear Seats .......................................................................2-10
Rear View Monitor .......................................................3-109
Rear Window Wiper and Washer..................................3-104
Recommended Lubricants and Capacities ........................8-6
Reduction Gear ...............................................................5-11 Good Driving Practices ..............................................5-16
LCD Display Messages ..............................................5-13
Parking........................................................................5-13
Reduction Gear Operation ..........................................5-11
Remote Smart Parking Assist (RSPA) ..........................3-113
Reporting Safety Defects ..................................................8-9 Scheduled Maintenance Services .....................................7-7
Maintenance Under Severe Usage Conditions...........7-10
Normal Maintenance Schedule ....................................7-8
Seat Belts ........................................................................2-21
Additional Seat Belt Safety Precautions ....................2-32
Care of Seat Belts .......................................................2-35
Seat Belt Restraint System .........................................2-24
Seat Belt Safety Precautions ......................................2-21
Seat Belt Warning Light .............................................2-22
Seats ..................................................................................2-4
Front air ventilation seat ............................................2-19
Front seat warmers .....................................................2-17
Front Seats ....................................................................2-6
Head Restraints ..........................................................2-13
Rear seat warmers ......................................................2-20
Rear Seats ...................................................................2-10
Safety Precautions ........................................................2-5
Side air bags....................................................................2-50
Side View Mirrors...........................................................3-30
Smart Cruise Control With Stop & Go System ..............5-98
Limitations of the System ........................................5-110
Sensor to Detect Distance to the Vehicle Ahead ......5-108
Smart Cruise Control Speed .....................................5-101
Smart Cruise Control Switch .....................................5-99
Index
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