2017 Hyundai Sonata Plug-in Hybrid Owner's Manual

7
Maintenance
7-17
Normal maintenance schedule (CONT.)
97,500 miles (156,000 km) or 78 months
❑Inspect air cleaner filter
❑ Inspect HSG belt *2
(97,500 miles (156,000 km) or 156 months)
❑ Inspect vacuum hose
❑ Air intake hose
❑ Replace engine oil and filter
(97,500 miles (156,000 km) or 156 months)
❑ Add fuel additive *
1
(97,500 miles (156,000 km) or 156 months)
105,000 miles (168,000 km) or 84 months
❑ Inspect air cleaner filter
❑ Inspect vacuum hose
❑ Inspect air conditioning refrigerant
❑ Inspect brake hoses and lines
❑ Inspect drive shafts and boots
❑ Inspect exhaust pipe and muffler
❑ Inspect front brake disc/pads, calipers
❑ Inspect rear brake disc/pads
❑ Inspect steering gear box, linkage & boots/lower arm ball
joint, upper arm ball joint
❑ Inspect suspension mounting bolts
❑ Inspect HSG belt *
2
(105,000 miles (168,000 km) or 168 months)
❑ Air intake hose
❑ Replace climate control air filter
(for evaporator and blower unit)
❑ Replace spark plugs (iridium coated)
❑ Replace engine oil and filter
(105,000 miles (168,000 km) or 168 months)
❑ Add fuel additive *
1
(105,000 miles (168,000 km) or 168 months
*1: If TOP TIER Detergent Gasoline is not available, one bottle
of additive is recommended. Additives are available from
your authorized HYUNDAI dealer along with information on
how to use them. Do not mix other additives.
*
2: Inspect HSG belt for evidence of cuts, crocks, excessive wear or oil saturation and replace if necessary. If drive belt
noise occurred, readjust drive belt tension before replace.
❈ Inspect : Inspect and if necessary, adjust, correct, clean or
replace.

Maintenance
7-18
Normal maintenance schedule (CONT.)
112,500 miles (180,000 km) or 90 months
❑Inspect air cleaner filter
❑ Inspect HSG belt *2
(112,500 miles (180,000 km) or 180 months)
❑ Inspect vacuum hose
❑ Air intake hose
❑ Replace engine oil and filter
(112,500 miles (180,000 km) or 180 months)
❑ Add fuel additive *
1
(112,500 miles (180,000 km) or 180 months
120,000 miles (192,000 km) or 96 months
❑ Inspect vacuum hose
❑ Inspect air conditioning refrigerant
❑ Inspect brake hoses and lines
❑ Inspect drive shafts and boots
❑ Inspect exhaust pipe and muffler
❑ Inspect front brake disc/pads, calipers
❑ Inspect rear brake disc/pads
❑ Inspect steering gear box, linkage & boots/lower arm ball
joint, upper arm ball joint
❑ Inspect suspension mounting bolts
❑ Inspect brake fluid
❑ Inspect fuel filter *
3
❑Inspect fuel cap, fuel lines, fuel hoses and connections
❑ Inspect fuel tank air filter (if equipped) *3
❑Inspect parking brake
❑ Inspect vapor hose and fuel filler cap
❑ Air intake hose
❑ Replace climate control air filter
(for evaporator and blower unit)
❑ Replace air cleaner filter
❑ Replace engine oil and filter
(120,000 miles (192,000 km) or 192 months)
(Continued)
*1: If TOP TIER Detergent Gasoline is not available, one bottle
of additive is recommended. Additives are available from
your authorized HYUNDAI dealer along with information on
how to use them. Do not mix other additives.
*
2: Inspect HSG belt for evidence of cuts, crocks, excessive wear or oil saturation and replace if necessary. If drive belt
noise occurred, readjust drive belt tension before replace.
❈ Inspect : Inspect and if necessary, adjust, correct, clean or
replace.

7
Maintenance
7-19
Normal maintenance schedule (CONT.)
(Continued)
❑Replace engine coolant
(First, 120,000 miles (192,000 km) or 120 months
after every 30,000 miles (48,000 km) or 24 months)
❑ Replace inverter coolant
(First, 120,000 miles (192,000 km) or 120 months
after every 30,000 miles (48,000 km) or 24 months)
❑ Add fuel additive *
1
(120,000 miles (192,000 km) or 192 months)
127,500 miles (204,000 km) or 102 months
❑ Inspect air cleaner filter
❑ Inspect HSG belt *2
(127,500 miles (204,000 km) or 204 months)
❑ Inspect vacuum hose
❑ Air intake hose
❑ Replace engine oil and filter
(127,500 miles (204,000 km) or 204 months)
❑ Add fuel additive *
1
(127,500 miles (204,000 km) or 204 months)*1: If TOP TIER Detergent Gasoline is not available, one bottle
of additive is recommended. Additives are available from
your authorized HYUNDAI dealer along with information on
how to use them. Do not mix other additives.
*
2: Inspect HSG belt for evidence of cuts, crocks, excessive wear or oil saturation and replace if necessary. If drive belt
noise occurred, readjust drive belt tension before replace.
*
3: Fuel filter & Fuel tank air filter are considered to be mainte- nance 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 sched-
ule and consult an authorized HYUNDAI dealer for details.
❈ Inspect : Inspect and if necessary, adjust, correct, clean or
replace. *
1: If TOP TIER Detergent Gasoline is not available, one bottle
of additive is recommended. Additives are available from
your authorized HYUNDAI dealer along with information on
how to use them. Do not mix other additives.
*
2: Inspect HSG belt for evidence of cuts, crocks, excessive wear or oil saturation and replace if necessary. If drive belt
noise occurred, readjust drive belt tension before replace.
❈ Inspect : Inspect and if necessary, adjust, correct, clean or
replace.

Maintenance
7-20
Normal maintenance schedule (CONT.)
135,000 miles (216,000 km) or 108 months
❑Inspect air cleaner filter
❑ Inspect vacuum hose
❑ Inspect air conditioning refrigerant
❑ Inspect brake hoses and lines
❑ Inspect drive shafts and boots
❑ Inspect exhaust pipe and muffler
❑ Inspect front brake disc/pads, calipers
❑ Inspect rear brake disc/pads
❑ Inspect steering gear box, linkage & boots/lower arm ball
joint, upper arm ball joint
❑ Inspect suspension mounting bolts
❑ Inspect HSG belt *
2
(135,000 miles (216,000 km) or 216 months)
❑ Air intake hose
❑ Replace climate control air filter
(for evaporator and blower unit)
❑ Replace engine oil and filter
(135,000 miles (216,000 km) or 216 months)
❑ Add fuel additive *
1
(135,000 miles (216,000 km) or 216 months)
142,500 miles (228,000 km) or 114 months
❑ Inspect air cleaner filter
❑ Inspect HSG belt *2
(142,500 miles (228,000 km) or 228 months)
❑ Inspect vacuum hose
❑ Air intake hose
❑ Replace engine oil and filter
(142,500 miles (228,000 km) or 228 months)
❑ Add fuel additive *
1
(142,500 miles (228,000 km) or 228 months)
*1: If TOP TIER Detergent Gasoline is not available, one bottle
of additive is recommended. Additives are available from
your authorized HYUNDAI dealer along with information on
how to use them. Do not mix other additives.
*
2: Inspect HSG belt for evidence of cuts, crocks, excessive wear or oil saturation and replace if necessary. If drive belt
noise occurred, readjust drive belt tension before replace.
❈ Inspect : Inspect and if necessary, adjust, correct, clean or
replace.

7
Maintenance
7-21
Normal maintenance schedule (CONT.)
No check, No service required
❑Automatic transmission fluid
150,000 miles (240,000 km) or 120 months
❑Inspect vacuum hose
❑ Inspect air conditioning refrigerant
❑ Inspect brake hoses and lines
❑ Inspect drive shafts and boots
❑ Inspect exhaust pipe and muffler
❑ Inspect front brake disc/pads, calipers
❑ Inspect rear brake disc/pads
❑ Inspect steering gear box, linkage & boots/lower arm ball
joint, upper arm ball joint
❑ Inspect suspension mounting bolts
❑ Inspect brake fluid
❑ Inspect fuel filter *
3
❑Inspect fuel lines, fuel hoses and connections
❑ Inspect fuel tank air filter (if equipped) *3
❑Inspect parking brake
❑ Inspect vapor hose and fuel filler cap
❑ Inspect HSG belt *
2
(150,000 miles (240,000 km) or 240 months)
❑ Air intake hose
❑ Replace climate control air filter
(for evaporator and blower unit)
❑ Replace air cleaner filter
❑ Replace engine oil and filter
(150,000 miles (240,000 km) or 240 months)
(Continued)
(Continued)
❑Replace engine coolant
(First, 120,000 miles (192,000 km) or 120 months
after every 30,000 miles (48,000 km) or 24 months)
❑ Replace inverter coolant
(First, 120,000 miles (192,000 km) or 120 months
after every 30,000 miles (48,000 km) or 24 months)
❑ Add fuel additive *
1
(150,000 miles (240,000 km) or 240 months)
*
1: If TOP TIER Detergent Gasoline is not available, one bottle of additive is recommended. Additives are available from
your authorized HYUNDAI dealer along with information on
how to use them. Do not mix other additives.
*
2: Inspect HSG belt for evidence of cuts, crocks, excessive wear or oil saturation and replace if necessary. If drive belt
noise occurred, readjust drive belt tension before replace.
*
3: Fuel filter & Fuel tank air filter are considered to be mainte- nance 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 sched-
ule and consult an authorized HYUNDAI dealer for details.
❈ Inspect : Inspect and if necessary, adjust, correct, clean or
replace.

Maintenance
7-22
Maintenance under severe usage conditions
The following items must be serviced more frequently on cars normally used under severe driving conditions.
Refer to the chart below for the appropriate maintenance intervals.
R : Replace I : Inspect and, after inspection, clean, adjust, repair or replace if neces\
sary
MAINTENANCE ITEMMAINTENANCEOPERATIONMAINTENANCE INTERVALSDRIVING
CONDITION
Engine oil and filterREvery 3,750 miles (6,000 km) or 6 monthsA, B, C, D, E, F, G, H, I, K
Air cleaner filterRMore frequentlyC, E
Spark plugsRMore frequentlyB, H
Automatic transmission fluidREvery 60,000 miles (96,000 km)A, C, D, E, F, G, H, I, K
HSG (Hybrid Starter&Generator) belt
REvery 30,000 miles (48,000 km) or 24 months
C, D, E, L
IEvery 3,750 miles (6,000 km) or 6 months
Front brake disc/pads, calipersIMore frequentlyC, D, G, H

7
Maintenance
7-23
Severe driving conditions
A - Repeatedly driving short distance of less than 5 miles (8 km)in normal temperature or less than 10 miles (16 km) in freez-
ing temperature
B - Extensive engine idling or low speed driving for long dis- tances
C - Driving on rough, dusty, muddy, unpaved, graveled or salt- spread roads
D - Driving in areas using salt or other corrosive materials or in very cold weather
E - Driving in sandy areas F - Driving in heavy traffic area over 90°F (32°C)
G- Driving on uphill, downhill, or mountain road
H - Towing a Trailer, or using a camper, or roof rack
I - Driving as a patrol car, taxi, other commercial use or vehicle
towing
J - Driving over 106 mph (170 km/h)
K - Frequently driving in stop-and-go conditions
MAINTENANCE ITEMMAINTENANCE OPERATIONMAINTENANCE INTERVALSDRIVING
CONDITION
Rear brake disc/padsIMore frequentlyC, D, G, F
Parking brakeIMore frequentlyC, D, G, H
Steering gear box, linkage & boots/lower
arm ball joint, upper arm ball jointIMore frequentlyC, D, E, F, G, H, I
Drive shafts and bootsIEvery 7,500 miles (12,000 km) or 6 monthsC, D, E, F, G,
H, I, J
Climate control air filter
(for evaporator and blower unit)RMore frequentlyC, E

7-24
Maintenance
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Engine oil and filter
The engine oil and filter should be
changed at the intervals specified in
the maintenance schedule. If the car
is being driven in severe conditions,
more frequent oil and filter changes
are required.
HSG (Hybrid starter & genera-
tor) belt
The HSG belt should be changed at
the intervals specified in the mainte-
nance schedule.
Fuel filter
A clogged filter can limit the speed at
which the vehicle may be driven,
damage the emission system and
cause multiple issues such as hard
starting. If an excessive amount of
foreign matter accumulates in the
fuel tank, the filter may require
replacement more frequently. After
installing a new filter, run the engine
for several minutes, and check for
leaks at the connections. Fuel filters
should be installed by an authorized
HYUNDAI dealer.
Fuel lines, fuel hoses and con-
nections
Check the fuel lines, fuel hoses and
connections for leakage and dam-
age. Have an authorized HYUNDAI
dealer replace any damaged or leak-
ing parts immediately.
Vapor hose and fuel filler cap
The vapor hose and fuel filler cap
should be inspected at those inter-
vals specified in the maintenance
schedule. Make sure a new vapor
hose or fuel filler cap is correctly
replaced.
Air cleaner filter
A genuine HYUNDAI air cleaner filter
is recommended when the filter is
replaced.
Spark plugs
Make sure to install new spark plugs
of the correct heat range.