2023 HYUNDAI TUCSON HYBRID brake fluid

9-3
09
„„Smartstream G1.6 T-GDi HEVSmartstream G1.6 T-GDi HEV
The actual engine compartment in the vehicle may differ from the illustration.
ONX4PH091001NONX4PH091001N
1. ECU
2. Engine coolant reservoir
3. Engine coolant reservoir cap
4. Inverter coolant reservoir
5. Brake fluid reservoir
6. Air cleaner7. Engine oil filler cap
8. Engine oil dipstick
9. Windshield washer fluid reservoir
10. Fuse box
11. Inverter coolant reservoir cap
ENGINE COMPARTMENT

09
9-5
WARNING
Performing maintenance work on a
vehicle can be dangerous. If you lack
sufficient knowledge and experience
or the proper tools and equipment
to do the work, have it done by an
authorized HYUNDAI dealer. ALWAYS
follow these precautions for performing
maintenance work:
• Park your vehicle on level ground,
move the shift button into the P
(Park) position, apply the parking
brake, and place the Engine Start/
stop button in the OFF position.
• Block the tires (front and back) to
prevent the vehicle from moving.
Remove loose clothing or jewelry
that can become entangled in
moving parts.
• If you must run the engine during
maintenance, do so out doors or in
an area with plenty of ventilation.
• Keep flames, sparks, or smoking
materials away from the battery and
fuel-related parts. The following lists are vehicle checks and
inspections that should be performed
by the owner or an authorized HYUNDAI
dealer at the frequencies indicated to
help ensure safe, dependable operation
of your vehicle.
Any adverse conditions should be
brought to the attention of your dealer as
soon as possible.
These Owner Maintenance vehicle
checks are generally not covered by
warranties and you may be charged for
labor, parts and lubricants used.
Owner Maintenance Schedule
When you stop for fuel:
• Check the coolant level in the engine
coolant reservoir.
• Check the windshield washer fluid level.
• Check for low or under-inflated tires.
WARNING
Be careful when checking your engine
coolant/inverter coolant level if the
engine is hot. This may result in coolant
being blown out of the opening and
cause serious burns and other injuries.
OWNER MAINTENANCE

Maintenance9-6
While operating your vehicle:
• Note any changes in the sound of the exhaust or any smell of exhaust fumes
in the vehicle.
• Check for vibrations in the steering wheel. Notice if there is any increased
steering effort or looseness in the
steering wheel, or change in its
straight-ahead position.
• Notice if your vehicle constantly turns slightly or “pulls” to one side when
traveling on smooth, level road.
• When stopping, listen and check for unusual sounds, pulling to one side,
increased brake pedal travel or “hard-
to-push” brake pedal.
• If any slipping or changes in the operation of your transmission occurs,
check the transmission fluid level.
• Check the automatic transmission P (Park) function.
• Check the parking brake.
• Check for fluid leaks under your vehicle (water dripping from the air
conditioning system during or after
use is normal).
At least monthly:
• Check coolant level in the engine coolant reservoir.
• Check the operation of all exterior lights, including the stoplights, turn
signals and hazard warning flashers.
• Check the inflation pressures of all tires including the spare for tires that
are worn, show uneven wear, or are
damaged.
• Check for loose wheel lug nuts.
At least twice a year:
• Check radiator, heater and air conditioning hoses for leaks or
damage.
• Check windshield washer spray and wiper operation. Clean wiper blades
with a clean cloth dampened with
washer fluid.
• Check headlight alignment.
• Check muffler, exhaust pipes, shields and clamps.
• Check the seat belts for wear and function.
At least once a year:
• Clean body and door drain holes.
• Lubricate door hinges and hood hinges.
• Lubricate door and hood locks and latches.
• Lubricate door rubber weather strips.
• Check the air conditioning system.
• Inspect and lubricate automatic transmission linkage and controls.
• Clean the battery and terminals. (For plug-in hybrid vehicle)
• Check the brake fluid level.

Maintenance9-10
MAINTENANCE INTERVALS
MAINTENANCE
ITEM Number of months or driving distance, whichever comes first
Months 12 24 36 48 60 72 84 96 108 120 132 144 156 168 180
Milesx1,000 8 16 24 32 40 48 56 64 72 80 88 96 104 112 120
Kmx1,000 13 26 39 52 65 78 91 104 117 130 143 156 169 182 195
Battery (12V) condition
(For plug-in hybrid vehicle) IIIIIIIIIIIIIII
Brake lines, hoses and connections IIIIIIIIIIIIIII
Disc brakes and pads IIIIIIIIIIIIIII
Steering gear rack, linkage and boots IIIIIIIIIIIIIII
Driveshaft 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 I I IIIIII : Inspect and if necessary, adjust, correct, clean or replace.
R : Replace or change.Normal Maintenance Schedule (CONT.)

09
9-11
MAINTENANCE INTERVALS
MAINTENANCE
ITEM Number of months or driving distance, whichever comes first
Months 12 24 36 48 60 72 84 96 108 120 132 144 156 168 180
Milesx1,000 8 16 24 32 40 48 56 64 72 80 88 96 104 112 120
Kmx1,000 13 26 39 52 65 78 91 104 117 130 143 156 169 182 195
Fuel tank air filter IIIIIII
Fuel lines, hoses and connections IIIIIII
Parking brake IIIIIII
Brake fluid Inspect every 8,000miles (13,000km) or 12 months.
Replace every 48,000miles (78,000km) or 48 months
Transfer case oil/rear differential oil *
5
III
Drive shaft IIIIIII
I : Inspect and if necessary, adjust, correct, clean or replace.
R : Replace or change.*5 :
Transfer case oil/rear differential oil should be changed anytime, front/rear differential have been submerged in water.

à Fuel filter is considered to be maintenance free but periodic inspection is recommended for this maintenance schedule
depends on fuel quality. If there are some important safety matters like fuel flow restriction, surging, loss of power, hard
starting problem etc, replace the fuel filter immediately regardless of maintenance schedule and consult an authorized
HYUNDAI dealer for details.
Normal Maintenance Schedule (CONT.)

Maintenance9-12
Maintenance Under Severe Usage Conditions
The following items must be serviced more frequently on cars mainly used under severe
driving conditions. Refer to the chart below for the appropriate maintenance intervals.
R : Replace
I : Inspect and if necessary, adjust, correct, clean or replace
Maintenance item Maintenance
operation Maintenance Intervals Driving
condition
Engine oil and engine oil filter R E
very 5,000 miles
(8,000 km) or 6 months D, H, I, L
Air cleaner filter R Replace more
frequently depending on the condition C, E
Spark plugs R Replace more
frequently depending on the condition A, B, F, G, H,
I, K
HSG (Hybrid Starter &
Generator) belt R
Every 30,000 miles
(48,000km) or
24 months B, C, D, E, I, K
I Every 5,000 miles
(8,000km) or
6 months
Automatic transmission fluid R Every 60,000 miles
(96,000km) A, C, D, E, F, G,
H, I, K
Steering gear rack, linkage and
boots IInspect more frequently
depending on the condition C, D, E, F, G,
H, I
Front suspension ball joints I Inspect more frequently
depending on the condition C, D, E, F, G
Disc brakes and pads, calipers
and rotors IInspect more frequently
depending on the
condition C, D, G, H, J, K
Parking brake I Inspect more frequently
depending on the condition C, D, G, H

09
9-15
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 for excessive wear, discs
for run out and wear, and calipers for
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.
Air Conditioning Refrigerant
Check the air conditioning lines and
connections for leakage and damage.
Drive Shaft and Related
Check the drive shaft, boots, clamps,
rubber couplings and center-bearing
rubber for cracks, deterioration, or
damage. Replace any damaged parts
and if necessary, repack the grease.

09
9-21
Checking the Hybrid Starter &
Generator (HSG) Belt
Have the Hybrid Starter & Generator
(HSG) belt inspected or replaced
according to the Maintenance Schedule
in this chapter by an authorized
HYUNDAI dealer.
CAUTION
When the HSG belt is worn out or
damaged, replace the belt.
Otherwise, it may cause engine
overheating or battery discharge.
WARNING
• Turn the vehicle off while you inspect
the engine or Hybrid Starter &
Generator (HSG) belt. Otherwise it
may result in serious injury.
• Keep hands, clothing etc. away from
the Hybrid Starter & Generator (HSG)
belt.
Checking the Brake Fluid Level
ONX4H090009ONX4H090009
Check the fluid level in the reservoir
periodically. The fluid level should be
between MAX and MIN marks on the side
of the reservoir.
Before removing the reservoir cap and
adding brake fluid, clean the area around
the reservoir cap thoroughly to prevent
brake fluid contamination.
If the level is low, add the specified brake
fluid to the MAX level. The level will fall
with accumulated mileage. This is a
normal condition associated with the
wear of the brake linings. If the fluid level
is excessively low, have the brake system
checked by an authorized HYUNDAI
dealer.
WARNING
If the brake system requires frequent
additions of fluid this could indicate
a leak in the brake system. Have the
vehicle inspected by an authorized
HYUNDAI dealer.
HYBRID STARTER &
GENERATOR (HSG) BELT BRAKE FLUID