2023 NISSAN MAXIMA spark plugs replace

8 Do-it-yourself
Maintenance precautions.......................8-2
Engine compartment check locations ...........8-3
Engine cooling system ..........................8-4
Checking engine coolant level ................8-5
Changing engine coolant ....................8-5
Engine oil .......................................8-6
Checking engine oil level .....................8-6
Changing engine oil and oil filter ..............8-7
Continuously Variable Transmission (CVT)
fluid ............................................. 8-11
Power Steering Fluid (PSF) .......................8-11
Brake fluid ...................................... 8-12
Windshield-washer fluid ........................8-12
Windshield-washer fluid reservoir ...........8-12
Battery......................................... 8-14
Jump starting ............................... 8-15
Drive belt ....................................... 8-16
Spark plugs .................................... 8-16
Replacing spark plugs .......................8-16
Air cleaner ..................................... 8-17
In-cabin microfilter .......................... 8-17Windshield wiper blades
........................8-18
Cleaning .................................... 8-18
Replacing ................................... 8-18
Brakes ......................................... 8-19
Fuses .......................................... 8-20
Engine compartment .......................8-20
Passenger compartment ...................8-21
Battery replacement ........................... 8-22
NISSAN Intelligent Key® ......................8-22
Lights .......................................... 8-24
Headlights .................................. 8-24
Front park/turn signal/side marker
light ......................................... 8-24
Fog lights (if so equipped) ...................8-24
Exterior and interior lights ...................8-25
Wheels and tires ............................... 8-27
Tire pressure ................................ 8-27
Tire labeling .................................
8-32
T

ypes of tires ................................ 8-35
Tire chains .................................. 8-36
Changing wheels and tires ..................8-36

1. Crankshaf t pulley
2. Drive belt automatic tensioner pulley
3. Generator pulley
4. Air conditioner compressor pulley
WARNING
Be sure the ignition switch is placed in
the OFF or LOCK position before servic-
ing drive belt. The engine could rotate
unexpectedly. 1. Visually inspect the belt for signs of un-
usual wear, cuts, fraying or looseness. If
the belt is in poor condition or is loose,
have it replaced or adjusted. It is recom-
mended that you visit a NISSAN dealer
for this service.
2. Have the belt checked regularly for con- dition and tension in accordance with
the maintenance schedule found in the
“Maintenance and schedules” section of
this manual.
REPLACING SPARK PLUGS
Iridium-tipped spark plugs
It is not necessary to replace iridium-
tipped
OAspark 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.
LDI2131SDI1895
DRIVE BELT SPARK PLUGS
8-16Do-it-yourself

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. The air cleaner filter should not be cleaned
and reused. Replace it according to the
maintenance log shown in the “Mainte-
nance and schedules” section of this
manual. When replacing the filter, wipe the
inside of the air cleaner filter housing and
the cover with a damp cloth.
To remove the air cleaner filter:
• Unlatch the clips
OAand move the air
cleaner cover upward.
• Remove the air cleaner filter.
• Wipe the inside of the air cleaner filter housing and cover with a damp cloth.
WARNING
• Operating the engine with the air
cleaner removed can cause you or
others to be burned. The air cleaner
not only cleans the air, it stops the
flame if the engine backfires. If it isn't
there, and the engine backfires, you
could be burned. Do not drive with
the air cleaner removed, and be care-
ful when working on the engine with
the air cleaner removed.
• Never pour fuel into the throttle body
or attempt to start the engine with
the air cleaner removed. Doing so
could result in serious injury.
IN-CABIN MICROFILTER
The in-cabin microfilter restricts the entry
of airborne dust and pollen particles and
reduces some objectionable outside
odors. The filter is located behind the glove
box. For additional information, see the
“Maintenance and schedules” section of
this manual.
If replacement is required, it is recom-
mended that you visit a NISSAN dealer for
this service.
LDI2756
AIR CLEANER
Do-it-yourself8-17

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, see “Recom-
mended fluids/lubricants and capaci-
ties” (P. 10-2).
EMISSION CONTROL SYSTEM
MAINTENANCE:
Engine 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, see “Engine cooling sys-
tem” (P. 8-5.)
NOTE: Mixing any other type of coolant or
the use of non-distilled water may reduce
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,
see “Recommended fluids/lubricants and
capacities” (P. 10-2).
Fuel tank vapor vent system*: Check
vapor lines for leaks or looseness. Tighten
connections or replace parts as necessary.
Fuel lines/connection*: Check the fuel
hoses, piping and connections for leaks,
looseness, or deterioration. Tighten con-
nections or replace parts as necessary.
Spark plugs: Replace at specified intervals.
Install new plugs of the same type as origi-
nally 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, de-
terioration and fluid leaks. Replace any dete-
riorated or damaged parts immediately.
Exhaust system: Visually inspect the ex-
haust pipes, muffler and hangers for leaks,
cracks, deterioration, and damage. Tighten
connections or replace parts as necessary.
In-cabin microfilter: Replace at specified
intervals. When driving for prolonged peri-
ods in dusty conditions, replace the filter
more frequently.
Steering gear and linkage, axle and sus-
pension parts, drive shaf t boots: Check
for damage, looseness, and leakage of oil
or grease. Under severe driving conditions,
inspect more frequently.
Tire rotation: Rotate tires at the specified
interval shown in the maintenance sched-
ule. When rotating tires, check for damage
and uneven wear. Replace if necessary.
9-6Maintenance and schedules

105,000 miles/(168,000 km)/
84 months
Perform at number of miles, kilometers or
months, whichever comes first.
Standard maintenance:
Inspections:
• Brake lines and cables
• Brake pads and rotors
• CVT transmission fluid
• Engine drive belts*
• Front drive shaf t boots
• Horn, lights, signals, wipers, rear hatch/hood lif t supports
• All fluids inspected (engine, wiper, brake, power steering, coolant)
• Hose inspections
• Engine air filter
• Suspension components (shocks, sub- frame, tie rods)
• Battery terminals and cables, battery test
• Tire pressure, treadwear and depth Essential:
• Replace engine oil & filter
• Replace in-cabin microfilter
• Replace spark plugs (1)(2)
• Replace engine coolant * (3)
• Tire rotation
Severe use maintenance:
Not Applicable. Proceed to next interval
(1) Replace spark plug when the plug gap
exceeds 0.053 in (1.35 mm) even if within
specified replacement mileage.
(2) Performed based on the number of
miles only.
(3) 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.
NOTE:
Engine Coolant service: 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.* Maintenance items and intervals with “*”
are recommended by NISSAN for reliable
vehicle operation. The owner need not per-
form such maintenance in order to main-
tain the emission warranty or manufac-
turer recall liability. Other maintenance
items and intervals are required.
9-24Maintenance and schedules

Remote Engine Start................3-17
Reporting safety defects (US only) .....10-21
S
Safety............................3-6
Child safety rear door lock ..........3-6
Childseatbelts.......1-21, 1-28, 1-34, 1-38
Reporting safety defects (US only) . . .10-21
Seat adjustment ....................1-3
Front power seat adjustment ........1-3
Seat belt extenders .................1-18
Seatbeltwarninglight.............. .1-14
Seatbelt.........................1-19 Childsafety.................... .1-19
Infants and small children ......1-19, 1-20
Injuredperson.................. .1-14
Largerchildren................. .1-20
Precautions on seat belt usage ......1-11
Pregnant women .................1-14
Seat belt extenders ...............1-18
Seat belt maintenance ............1-18
Seatbelts................... .1-11, 7-9
Shoulder belt height adjustment .....1-17
Three-pointtypewithretractor......1-15
Seat............................3-30 Memory seat ...............3-30,3-32
Seatback pockets ..................2-64
Seats ........................... .1-2
Adjustment ..................... .1-2
Armrests....................... .1-6
Frontseats..................... .1-2Heatedseats...............2-54,2-55
Rearseat ......................
.1-5
Security indicator light ...............2-11
Security system (NISSAN Vehicle
Immobilizer System), engine start ......2-42
Security systems ..................2-40
Vehicle security system ...........2-40
Self-adjustingbrakes ...............8-19
Service manual order form ..........10-23
Servicing air conditioner .............4-33
Shifting..........................5-17 Continuously Variable Transmission
(CVT) ..........................5-17
Shoulder belt height adjustment .......1-17
Spark plug replacement .............8-16
Spark plugs .......................8-16
Specifications .....................10-9
Speedometer ......................2-4
Spotlights(Seemaplight)............2-76
SRS warning label ..................1-62
Stability control ...................5 -115
Standard maintenance ..............9-8
Starting the engine .................5-14
Starting..........................5-14
Before starting the engine ..........
5-14
Jumpstarting................6-9,8-15
Precautions when starting and
driving.........................5-4
Push starting ....................6-11
Starting the engine ...............5-14
Steering wheel ....................3-24
Steering.........................2-57 Heated steering wheel ............2-57 Powersteeringfluid...............8-11
Powersteeringsystem ...........5
-112
Stoplight........................8-25
Storagetray......................2-65
Storage .........................2-64
Sunvisors........................3-26
Sunglasses case ...................2-66
Sunglasses holder .................2-66
Sunroof ..........................2-72
Supplemental air bag warning light .....1-62
Supplemental front impact air bag
system ......................... .1-49
Supplemental restraint system
(Supplemental air bag system) ........1-41
Supplemental restraint system ........1-62
Information and warning labels ......1-62
Precautions on supplemental restraint
system ....................... .1-41
Switch ..........................2-47 Autolightswitch.................2-47
Automaticpowerwindowswitch.....2-71
Foglightswitch .................2-53
Hazard warning flasher switch .......6-2
Headlight and turn signal switch .....2-46
Headlightcontrolswitch...........2-46
Instrument brightness control ......2-52
Power door lock switch ............3-5
Rear window and outside mirror
defrosterswitch.................2-45
Turn signal switch ................2-52
11-6