2023 NISSAN ALTIMA spark plugs

8 Do-it-yourself
Maintenance precautions.......................8-2
Engine compartment check locations ...........8-3
Engine cooling system ..........................8-5
Checking engine coolant level ................8-6
Changing engine coolant ....................8-6
Engine oil .......................................8-7
Checking engine oil level .....................8-7
Changing engine oil and oil filter ..............8-8
Continuously Variable Transmission (CVT)
fluid ............................................ 8-12
Brake fluid ...................................... 8-12
Windshield-washer fluid ........................8-13
Windshield-washer fluid reservoir ...........8-13
Battery......................................... 8-14
Jump starting ............................... 8-15
Variable voltage control system ................8-16
Drive belt ....................................... 8-16
Spark plugs .................................... 8-17
Replacing spark plugs ....................... 8-17
Air cleaner ..................................... 8-18In-cabin microfilter
.......................... 8-18
Windshield wiper blades ........................8-19
Cleaning .................................... 8-19
Replacing ................................... 8-19
Brakes ......................................... 8-20
Fuses .......................................... 8-21
Engine compartment ....................... 8-21
Passenger compartment ...................8-22
Battery replacement ........................... 8-23
NISSAN Intelligent Key® ......................8-24
Lights .......................................... 8-25
Headlights .................................. 8-25
Fog lights (if so equipped) ...................8-26
Exterior and interior lights ...................8-26
Wheels and tires ............................... 8-29
Tire pressure ................................ 8-29
Tire labeling ................................. 8-33
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 rec-
ommended 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
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.
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
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:
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 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 see
“Recommended fluids/lubricants and ca-
pacities” (P. 10-2).
Engine valve clearance*: Inspect only if
valve noise increases. Adjust valve clear-
ance if necessary.
Fuel tank vapor vent system*: Check va-
por lines for leaks or looseness. Tighten
connections or replace parts as necessary.
Fuel filter: Periodic maintenance is not re-
quired. (in-tank type filter)
Fuel lines/connections*: 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 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
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.
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.
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.
9-6Maintenance and schedules

105,000 miles/(168,000 km)/
126 months
Perform at number of miles, kilometers or
months, whichever comes first.
Standard maintenance:
Inspections:
• Horn, lights, signals, wipers, rear hatch/hood lif t supports
• All fluids inspected (engine, wiper, brake, power steering, coolant)
• Engine drive belts and hose inspections
• Engine air filter
• Propeller shaf t (AWD models)
• Suspension components (shocks, sub- frame, tie rods)
• Differential and fluid (AWD models)
• Battery terminals and cables, battery test
• Tire pressure, treadwear and depth
Essentials:
• Tire rotation
• Replace spark plugs (1) (2)
• Engine coolant * (3) Severe use maintenance:
Inspections:
• Brake pads & rotors
• Exhaust system
• Propeller shaf t (AWD models)
• Steering gear & linkage
• Axle & suspension parts
• Drive shaf t boots
(1) Performed based on the number of
miles only
(2) Replace spark plug when the plug gap
exceeds 0.053 in (1.35 mm) even if within
specified periodic replacement mileage.
(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.
* 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.
110,000 miles/(176,000 km)/
132 months
Perform at number of miles, kilometers or
months, whichever comes first.
Standard maintenance:
Inspections:
• Brake lines & cables
• Brake pads & rotors
• CVT transmission fluid
• Engine drive belts
• Propeller shaf t (AWD models)
• Differential gear oil (AWD models)
• Transfer case oil (AWD models)
• 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)
• Differential and fluid (AWD models)
• Battery terminals and cables, battery test
• Tire pressure, treadwear and depth
Maintenance and schedules9-25

Essentials:
• Replace engine oil & filter (1)
• Replace engine air filter (2)
• Replace brake fluid
• Replace in-cabin microfilter
• Replace intelligent key battery
• Tire rotation
Severe use maintenance:
Inspections:
• Brake pads & rotors
• Exhaust system
• Drive shaf t boots
• Steering gear & linkage
• Axle & suspension parts
Essentials:
• Replace brake fluid
(1) If the oil replacement indicator is dis-
played, change the engine oil and filter
within two weeks or less than 500 miles
(800 km).
(2) If operating mainly in dusty conditions,
more frequent maintenance may be
required.Additional information
NOTE FOR ENGINE COOLANT *:
(1) 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.
* 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.
NOTE FOR SPARK PLUGS:
(1) Replace every 105,000 miles (168,000
km)
(2) Replace spark plug when the plug
gap exceeds 0.049 in (1.25 mm) even if
within specified periodic replacement
mileage.
9-40Maintenance and schedules

Rear power windows.............2-76Rear seat.....................1-6Rear Sonar System (RSS)..........5-179Rear window and outside mirror defroster
switch..................... .2-56Rearview mirror................3-29RearView Monitor................4-8Recommended Fluids............10-2Recorders
Event Data.............10-24, 10-25Refrigerant recommendation.......10-8Registering a vehicle in another
country.................... .10-12Remote Engine Start..........3-19,5-17Repairing flat tire................6-11Repairing tire..................6-13Reporting safety defects (US only). . . .10-22
S
Safety
Child safety rear door lock.........3-7Child seat belts.....1-23, 1-31, 1-38, 1-43Reporting safety defects (US only). .10-22Seat
Memory seat.........3-31, 3-32, 3-33Seat adjustmentFront manual seat adjustment......1-3Front power seat adjustment.......1-4Rear seat adjustment............1-6Seat beltChild safety..................1-21Infants and small children.....1-21,1-22
Injured person................1-15Larger children...............1-22Precautions on seat belt usage.....1-12Pregnant women..............1-15Seat belt extenders............1-20Seat belt maintenance..........1-20Seat belts................1-12,7-7Shoulder belt height adjustment. . . .1-19Three-point type with retractor.....1-15Seat belt extenders..............1-20Seat belt warning light.........1-14,2-12Seatback pockets...............2-71SeatsAdjustment..................1-2Armrests....................1-7Front seats..................1-2Manual front seat adjustment......1-3Rear seat.................. .1-6Security indicator light............2-12Security system (NISSAN Vehicle Immobilizer
System), engine start.........2-54, 5-16Security systems
Vehicle security system.........2-52Self-adjusting brakes.............8-20Service manual order form........10-26Servicing air conditioner...........4-44Shif t lever lock release............5-22Shif tingContinuously Variable Transmission
(CVT)
.....................5-20Shoulder belt height adjustment......1-19Siri® Eyes-Free................ .4-64Sonar
Rear system................5-179
Spark plug replacement...........8-17Spark plugs...................8-17Specifications................ .10-9Speedometer................. .2-4Spotlights (See map light)..........2-80SRS warning label...............1-67Stability control................5-175Standard maintenance........9-10,9-28Starting
Before starting the engine........5-16Jump starting............6-17,8-15Precautions when starting and
driving................. .5-4, 5-10Push starting................6-19Starting the engine............5-16Starting the engine..............5-16Steering
Heated steering wheel..........2-65Power steering system.........5-172Steering Assist switch
(for vehicles with ProPILOT Assist).....2-66Steering wheel.................3-27Stop light....................8-26Storage.....................2-71Sun visors....................3-28Sunglasses case................2-73Sunglasses holder...............2-73Sunroof...................2-77,7-6Supplemental air bag warning
light................... .1-67, 2-12Supplemental front impact air bag
system..................... .1-54Supplemental restraint system
Information and warning labels.....1-67
11-6