2019 NISSAN ALTIMA spark plugs replace

8 Do-it-yourself
Maintenance precautions.......................8-2
Engine compartment check locations ...........8-4
Engine cooling system ..........................8-6
Checking engine coolant level ................8-7
Changing engine coolant .....................8-7
Engine oil ........................................8-8
Checking engine oil level .....................8-8
Changing engine oil and oil filter ..............8-9
Continuously Variable Transmission (CVT)
fluid ............................................ 8-13
Brake fluid ...................................... 8-13
Windshield-washer fluid ........................8-14
Windshield-washer fluid reservoir ............8-14
Battery......................................... 8-15
Jump starting ............................... 8-16
Variable voltage control system ................8-17
Drive belt ....................................... 8-17
Spark plugs .................................... 8-18
Replacing spark plugs .......................8-18
Air cleaner ...................................... 8-19In-cabin microfilter
.......................... 8-19
Windshield wiper blades ........................8-20
Cleaning .................................... 8-20
Replacing ................................... 8-20
Brakes.......................................... 8-21
Fuses ........................................... 8-22
Engine compartment .......................8-22
Passenger compartment ....................8-23
Battery replacement ........................... 8-24
NISSAN Intelligent Key® ......................8-25
Lights .......................................... 8-26
Headlights ................................... 8-26
Fog lights (if so equipped) ...................8-27
Exterior and interior lights ...................8-27
Wheels and tires ................................ 8-30
Tire pressure ................................ 8-30
Tire labeling ................................. 8-34
Types of tires ................................ 8-36
Tir

e chains .................................. 8-37
Changing wheels and tires ..................8-39

1. Visually inspect the belt for signs of un-usual wear, cuts, or fraying. If the belt is
in poor condition, have it replaced. It is
recommended that you visit a NISSAN
dealer for this service.
2. Have the belt checked regularly for condition.
REPLACING SPARK PLUGS
Iridium-tipped spark plugs
It is not necessary to replace iridium-
tipped
Aspark plugs as frequently as con-
ventional type spark plugs because they
last much longer. Follow the maintenance
log shown in the “Maintenance and sched-
ules” section of this manual. Do not service
iridium-tipped spark plugs by cleaning or
regapping.
∙ Always replace spark plugs with rec-
ommended or equivalent ones.
WARNING
Be sure the engine and ignition switch
are off and that the parking brake is
engaged securely.
CAUTION
Be sure to use the correct socket to re-
move the spark plugs. An incorrect
socket can damage the spark plugs.
If replacement is required, it is recom-
mended that you visit a NISSAN dealer for
this service.
SDI1895
SPARK PLUGS
8-18Do-it-yourself

NOTE:
NISSAN does not advocate the use of
non-OEM approved af termarket flush-
ing systems and strongly advises
against performing these services on a
NISSAN product. Many of the af termar-
ket flushing systems use non-OEM ap-
proved chemicals or solvents, the use of
which has not been validated by NISSAN.
For recommended fuel, lubricants, fluids,
grease, and refrigerant, refer to “Recom-
mended fluids/lubricants and capaci-
ties” in the “Technical and consumer in-
formation” section of this manual.
EMISSION CONTROL SYSTEM
MAINTENANCE:
Drive belts*:Check engine drive belts for
wear, fraying or cracking and for proper
tension. Replace any damaged drive belts.
Engine air filter: Replace at specified inter-
vals. When driving for prolonged periods in
dusty conditions, check/replace the filter
more frequently.
Engine coolant*: Replace coolant at the
specified interval. When adding or replac-
ing coolant, be sure to use only Genuine
NISSAN Long Life Antifreeze/Coolant (blue) or equivalent with the proper mixture. (For
additional information on the proper mix-
ture for your area, refer to “Engine cooling
system” in the “Do-it-yourself ” section of
this manual.)
NOTE: Mixing any other type of coolant
or the use of non-distilled water may re-
duce the recommended service interval
of the coolant.
Engine oil and oil filter:
Replace engine oil
and oil filter at the specified intervals. For
recommended oil grade and viscosity refer
to “Recommended fluids/lubricants and
capacities” in the “Technical and consumer
information” section of this manual.
Engine valve clearance*: Inspect only if
valve noise increases. Adjust valve clear-
ance if necessary.
Evaporative emissions control vapor
lines*: Check vapor lines for leaks or loose-
ness. Tighten connections or replace parts
as necessary.
Fuel filter: Periodic maintenance is not re-
quired. (in-tank type filter)
Fuel lines*: Check the fuel hoses, piping
and connections for leaks, looseness, or
deterioration. Tighten connections or re-
place parts as necessary. Spark plugs:
Replace at specified intervals.
Install new plugs of the type as originally
equipped.
CHASSIS AND BODY
MAINTENANCE:
Brake lines and cables: Visually inspect for
proper installation. Check for chafing,
cracks, deterioration, and signs of leaking.
Replace any deteriorated or damaged
parts immediately.
Brake pads and rotors: Check for wear,
deterioration and fluid leaks. Replace any
deteriorated or damaged parts immedi-
ately.
Exhaust system: Visually inspect the ex-
haust pipes, muffler and hangers for leaks,
cracks, deterioration, and damage. Tighten
connections or replace parts as necessary.
Propeller shaf t(s): Check for damage,
looseness, and grease leakage. (AWD)
In-cabin microfilter: Replace at specified
intervals. When driving for prolonged peri-
ods in dusty conditions, replace the filter
more frequently.
9-6Maintenance and schedules

PR25DD ENGINE MODEL
The following tables show the standard
maintenance schedule. Depending upon
weather and atmospheric conditions,
varying road surfaces, individual driving
habits and vehicle usage, additional or
more frequent maintenance may be re-
quired.Af ter 120,000 miles (192,000 km)/
144 months, continue maintenance at
the same mileage/time interval.
EMISSION CONTROL SYSTEM MAINTENANCE
Abbreviations: I = Inspect and correct or replace as necessary, R = Replace
MAINTENANCE OPERATION
Perform at number of miles, kilometers or months, whichever comes first. miles x 1,000
(km x 1,000) Months MAINTENANCE INTERVAL
5
(8) 6 10
(16) 12 15
(24) 18 20
(32) 24 25
(40) 30 30
(48) 36 35
(56) 42 40
(64) 48 45
(72) 54 50
(80) 60 55
(88) 66 60
(96) 72
Drive belt See NOTE (1) I*I*I*
Air cleaner filter See NOTE (2) RR
Engine oil See NOTE (3)RRRRRR
Engine oil filter See NOTE (3)RRRRRR
Engine coolant* See NOTE (4)(5)
EVAP vapor lines I*I*I*
Fuel lines I*I*I*
Fuel filter See NOTE (6)
Spark plugs (Iridium - tipped type) See NOTE (7)Replace every 105,000 miles (168,000 km)
Intake and exhaust valve clearances* See NOTE (8)
STANDARD MAINTENANCE
9-10Maintenance and schedules

Abbreviations: I = Inspect and correct or replace as necessary, R = Replace
MAINTENANCE OPERATION
Perform at number of miles, kilometers or months, whichever comes first. miles x 1,000
(km x 1,000) Months MAINTENANCE INTERVAL
65
(104) 78 70
(112) 84 75
(120) 90 80
(128) 96 85
(136) 102 90
(144) 108 95
(152) 114 100
(160) 120 105
(168) 126 110
(176) 132 115
(184) 138 120
(192) 144
Drive belt See NOTE (1) I* I* I* I* I* I*
Air cleaner filter See NOTE (2) R R
Engine oil See NOTE (3) R R R R R R
Engine oil filter See NOTE (3) R R R R R R
Engine coolant* See NOTE (4)(5)
EVAP vapor lines I*I*I*
Fuel lines I*I*I*
Fuel filter See NOTE (6)
Spark plugs (Iridium - tipped type) See NOTE (7)Replace every 105,000 miles (168,000 km)
Intake and exhaust valve clearances* See NOTE (8)
NOTE:
(1) Af ter 40,000 miles (64,000 km) or 48 months, inspect every 10,000 miles (16,000 km) or 12 months. Replace the drive belts if
found damaged.
(2) If operating mainly in dusty conditions, more frequent maintenance may be required.
(3) If the oil replacement indicator is displayed, change the engine oil and filter as soon as possible. Af ter replacing the engine oil
reset the display.
(4) First replacement interval is 105,000 miles (168,000 km) or 84 months. Af ter first replacement, replace every 75,000 miles
(120,000 km) or 60 months.
(5) Use only Genuine NISSAN Long Life Antifreeze/Coolant (blue) or equivalent with proper mixture ratio of 50% antifreeze and 50%
demineralized or distilled water. Mixing any other type of coolant or the use of non-distilled water may reduce the life expectancy
of the factory fill coolant.
(6) Periodic maintenance is not required.
(7) Replace spark plug when the plug gap exceeds 1.35 mm (0.053 in) even if within specified periodic replacement mileage.
(8) Periodic maintenance is not required. However, if valve noise increased, inspect valve clearance.
* Maintenance items and intervals with “*” are recommended by NISSAN for reliable vehicle operation. The owner need not perform
such maintenance in order to maintain the emission warranty or manufacturer recall liability. Other maintenance items and
intervals are required.
Maintenance and schedules9-11

KR20DDET ENGINE MODEL
The following tables show the standard
maintenance schedule. Depending upon
weather and atmospheric conditions,
varying road surfaces, individual driving
habits and vehicle usage, additional or
more frequent maintenance may be re-
quired.Af ter 90,000 miles (144,000 km)/
144 months, continue maintenance at
the same mileage/time interval.
EMISSION CONTROL SYSTEM MAINTENANCE
Abbreviations: I = Inspect and correct or replace as necessary, R = Replace
MAINTENANCE OPERATION
Perform at number of miles, kilometers or months, whichever comes first. Miles x 1,000
(km x 1,000) Months MAINTENANCE INTERVAL
3.75 (6)6 7. 5
(12) 12 11.25
(18)18 15
(24) 24 18.75
(30)30 22.5
(36) 36 26.25
(42)42 30
(48) 48 33.75
(54)54 37.5
(60) 60 41.25
(66)66 45
(72) 72
Drive belt See NOTE (1) I*I*I*
Air cleaner filter See NOTE (2) R
EVAP vapor lines I*I*I*
Fuel lines I*I*I*
Fuel filter See NOTE (3)
Engine coolant* See NOTE (4)(5)
Engine oil See NOTE (6)RRRRRR
Engine oil filter See NOTE (6)RRRRRR
Spark plugs See NOTE (7)Replace every 105,000 miles (168,000 km)
Intake and exhaust valve clearances* See NOTE (8)
STANDARD MAINTENANCE
Maintenance and schedules9-15

MAINTENANCE OPERATION
Perform at number of miles, kilometers or months, whichever comes first. Miles x 1,000
(km x 1,000) Months MAINTENANCE INTERVAL
48.75 (78)78 52.5
(84) 84 56.25
(90)90 60
(96) 96 63.75
(102) 102 67.5
(108) 108 71.25
(114) 114 75
(120) 120 78.75
(126) 126 82.5
(132) 132 86.25
(138) 138 90
(144) 144
Drive belt See NOTE (1)I*I*I*I*I*I*
Air cleaner filter See NOTE (2)R R
EVAP vapor lines I*I*I*
Fuel lines I*I*I*
Fuel filter See NOTE (3)
Engine coolant* See NOTE (4)(5)
Engine oil See NOTE (6)RRRRRR
Engine oil filter See NOTE (6)RRRRRR
Spark plugs See NOTE (7)Replace every 105,000 miles (168,000 km)
Intake and exhaust valve clearances* See NOTE (8)
NOTE:
(1) Af ter 30,000 miles (48,000 km) or 48 months, inspect every 7,500 miles (12,000 km) or 12 months. Replace the drive belts if
found damaged.
(2) If operating mainly in dusty conditions, more frequent maintenance may be required.
(3) Periodic maintenance is not required.
(4) First replacement interval is 105,000 miles (168,000 km) or 84 months. Af ter first replacement, replace every 75,000 miles
(120,000 km) or 60 months.
(5) Use only Genuine NISSAN Long Life Antifreeze/Coolant (blue) or equivalent with proper mixture ratio of 50% antifreeze and 50%
demineralized or distilled water. Mixing any other type of coolant or the use of non-distilled water may reduce the life expectancy
of the factory fill coolant.
(6) If the oil replacement indicator is displayed, change the engine oil and filter within two weeks or less than 500 miles (800 km)
(7) Replace spark plug when the plug gap exceeds 0.049 in (1.25 mm) even if within specified periodic replacement mileage.
(8) Periodic maintenance is not required. However, if valve noise increased, inspect valve clearance.
* Maintenance items and intervals with “*” are recommended by NISSAN for reliable vehicle operation. The owner need not perform
such maintenance in order to maintain the emission warranty or manufacturer recall liability. Other maintenance items and
intervals are required.
9-16Maintenance and schedules

Armrests ...................1-7
Automatic drive
positioner ...........3-33,3-34,3-35
Frontseats..................1-2
Manual front seat adjustment ......1-3
Rearseat...................1-5
Security indicator light ............2-17
Security system (NISSAN Vehicle Immobilizer
System), engine start ..........2-40,5-16
Security systems Vehicle security system .........2-39
Self-adjustingbrakes.............8-21
Service manual order form .........10-22
Servicing air conditioner ...........4-41
Shif ting Continuously Variable Transmission
(CVT) .....................5-20
Shiftleverlockrelease............5-23
Shoulder belt height adjustment ......1-19
Sonar Rear system ................5-176
Spark plug replacement ...........8-18
Spark plugs ...................8-18
Specifications .................10-8
Speedometer ................2-4,2-5
Speedometer and odometer ........2-4
Spotlights(Seemaplight)..........2-65
SRS warning label ...............1-66
Stability control ................5-172
Standard maintenance ........9-10,9-15
Starting Before starting the engine ........5-16
Jumpstarting.............6-9,8-16
Precautions when starting and
driving ..................5-4,5-11
Push starting ................6-11 Starting the engine
............5-17
Starting the engine ..............5-17
Steering Heated steering wheel ..........2-52
Powersteeringsystem.........5-169
Steering Assist switch
(forvehicleswithProPILOTAssist).....2-52
Steering wheel .................3-29
Stoplight....................8-27
Storage.....................2-56
Sunglasses case ................2-58
Sunglasses holder ..............2-58
Sunroof ......................7-5
Sunroof (see Moonroof ) ...........2-62
Sunvisors....................3-30
Supplemental air bag warning
light.................... .1-66, 2-15
Supplemental front impact air bag
system ..................... .1-53
Supplemental restraint system Information and warning labels . . . .1-66
Precautions on supplemental restraint
system ................... .1-46
Supplemental restraint system
(Supplemental air bag system) .......1-46
Switch Autolightswitch..............2-44
Automatic power window switch . . .2-61
Foglightswitch..............2-50
Hazard warning flasher switch ......6-2
Headlight and turn signal switch ....2-43
Headlightcontrolswitch.........2-43
Instrument brightness control .....2-49
Power door lock switch ..........3-6
Rear window and outside mirror
defrosterswitch..............2-43 Turn signal switch
.............2-49
T
Tachometer ...................
2-6
Temperature gauge Engine coolant temperature gauge . .2-6
Thef t (NISSAN Vehicle Immobilizer System),
engine start ...............2-40,5-16
Three-waycatalyst...............5-4
Tilt Telescopicsteering............3-30
Tire Flattire..................6-3,6-4
Spare tire ...............6-5,8-42
Tire and Loading Information label . .10-12
Tire chains .................8-37
Tire pressure ................8-30
Tirerotation ................8-39
Types of tires ................8-36
Uniform tire quality grading .......10-17
Wheels and tires ..............8-30
Wheel/tire size ...............10-9
Tire pressure Low tire pressure warning light .....2-12
Tire Pressure Monitoring System
(TPMS)....................5-5,6-3
Towing 4-wheel drive models ...........6-13
Flattowing.................10-17
Trailertowing ...............10-17
Towingatrailer................10-17
Towingyourvehicle..............6-12
Traffic Sign Recognition (TSR) ........5-31
11-6