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8 Maintenance and do-it-yourself
Maintenance requirements..........................8-2
General maintenance..............................8-2
Explanation of general maintenance items.........8-2
Maintenance precautions . . .........................8-5
Engine compartment check locations................8-6
Engine cooling system.............................8-8
Checking engine coolant level...................8-8
Changing engine coolant........................8-9
Engine oil.........................................8-9
Checking engine oil level........................8-9
Changing engine oil...........................8-11
Changing engine oil filter.......................8-12
Continuously Variable Transmission (CVT) fluid......8-13
Brake and clutch fluid.............................8-13
Brake fluid . . ..................................8-14
Clutch fluid . ..................................8-14
Window washer fluid.............................8-14
Window washer fluid reservoir..................8-14
Battery..........................................8-15
Jump starting.................................8-16
Drive belt........................................8-17
Spark plugs......................................8-18Replacing spark plugs . ........................8-18
Air cleaner.......................................8-19
In-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 . . .....................8-24
Battery replacement..............................8-25
Keyfob.......................................8-25
NISSAN Intelligent Key™.......................8-27
Lights...........................................8-28
Headlights....................................8-28
Exterior and interior lights . . .....................8-29
Wheels and tires.................................8-31
Tire pressure..................................8-31
Tire labeling...................................8-35
Types of tires..................................8-37
Tire chains....................................8-38
Changing wheels and tires.....................8-38
REVIEW COPY—2009 Sentra(sen)
Owners Manual—USA_English(nna)
10/27/08—tbrooks
Page 265 of 326

The air cleaner filter should not be cleaned and
reused. Replace it according to the maintenance
log shown in the “NISSAN Service and Mainte-
nance Guide.” 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, push the tabs
A
and pull the unit upwardB.
WARNING
●Operating the engine with the air
cleaner removed can cause you or oth-
ers 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 careful 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 air-
borne dust and pollen particles and reduces
some objectionable outside odors. The filter is
located behind the trim panel near the accelera-
tor pedal. Refer to the “NISSAN Service and
Maintenance Guide” for change intervals.
If replacement is required, see your NISSAN
dealer.
Type A
LDI0541
Type B
WDI0596
AIR CLEANER
Maintenance and do-it-yourself8-19
REVIEW COPY—2009 Sentra(sen)
Owners Manual—USA_English(nna)
10/27/08—tbrooks
Page 321 of 326

Foglightswitch.................2-22
Foldingrearseat............1-3,1-4,1-5
Front air bag system
(See supplemental restraint system).....1-47
Frontseats....................1-2
Fuel
Capacities and recommended
fuel/lubricants.................9-2
Fuel economy................5-21
Fuelgauge..................2-5
Fuel octane rating..............9-5
Fuel recommendation............9-4
Fuel-filler door and cap...........3-24
Fuel-filler door lock opener lever......3-24
Fuel economy setting..............4-4
Fuses ......................8-22
Fusible links...................8-23
G
Gascap.....................3-24
Gauge
Engine coolant temperature gauge.....2-6
Engine oil pressure gauge..........2-6
Fuelgauge..................2-5
g-forcegauge.................2-5
Odometer...................2-4
Speedometer.................2-3
Tachometer..................2-4
Trip odometer.................2-4
Generalmaintenance ..............8-2
g-forcegauge...................2-5
Glovebox....................2-28
Gloveboxlock .................2-28
Grocery hooks.................2-31H
Hands-free phone system, Bluetooth....4-39
Hazard warning flasher switch.........2-22
Head restraints..................1-8
Active Head Restraint............1-7
Headlight and turn signal switch........2-20
Headlight control switch............2-20
Headlights....................8-28
Heatedseats..................2-23
Heater
Heater and air conditioner controls.....4-7
Heater operation..............4-10
Hood release..................3-22
Horn.......................2-23
I
Ignition switch..................5-7
Immobilizer system.........2-17,3-2,5-10
Important vehicle information label.......9-12
In-cabin microfilter...............8-19
Increasing fuel economy............5-21
Indicator lights and audible reminders
(See warning/indicator lights and audible
reminders).....................2-8
Inside mirror...................3-27
Instrument brightness control.........2-21
Instrument panel..............0-6,2-2
Instrument panel dimmer switch........2-21
Intelligent Key system
Key operating range............3-12
Key operation................3-13
Mechanical key................3-3Remote keyless entry operation......3-16
Troubleshooting guide...........3-21
Warning signals...............3-21
Interiorlight...................2-37
Interior trunk lid release.............3-23
ISOFIX child restraints.............1-22
J
Jump starting...................6-8
K
Keyfob battery replacement..........8-25
Keyless entry
With Intelligent Key system
(See Intelligent Key system)........3-16
Keys, Except Intelligent Key...........3-2
L
Labels
Air conditioner specification label.....9-13
C.M.V.S.S. certification label........9-12
Emission control information label.....9-13
Engine serial number............9-12
F.M.V.S.S. certification label........9-12
Tire and Loading Information label.....9-13
Vehicle identification number (VIN)
plate.....................9-11
Warning labels (for SRS)..........1-55
Language setting.................4-6
10-3
REVIEW COPY—2009 Sentra(sen)
Owners Manual—USA_English(nna)
10/27/08—tbrooks