2009 Acura MDX tire pressure

Check the air pressures when the
tires are cold. This means the vehicle
has been parked for at least 3 hours,
or driven less than 1 mile (1.6 km).
Add or release air, if needed, to
match the recommended cold tire
pressures.
If you check air pressures when the
tires are hot [driven for several miles
(kilometers)], you will see readings 4
to 6 psi (30 to 40 kPa, 0.3 to 0.4
kgf/cm
2) higher than the cold
readings. This is normal. Do not let
air out to match the recommended
cold air pressure. The tire will be
underinflated. While tubeless tires have some
ability to self-seal if they are
punctured, you should look closely
for punctures if a tire starts losing
pressure.
You should get your own tire
pressure gauge and use it whenever
you check your tire pressures. This
will make it easier for you to tell if a
pressure loss is due to a tire problem
and not due to a variation between
gauges.
Recommended Tire Pressures
The following chart shows the
recommended cold tire pressures for
most normal and high-speed driving
conditions.
Tire Size Cold Tire Pressure
for Normal Driving
P255/55R18 104H Front/Rear:
32 psi (220 kPa, 2.2
kgf/cm
2)
The compact spare tire pressure is:
60 psi (420 kPa, 4.2 kgf/cm
2)
For convenience, the recommended
tire sizes and cold tire pressures are
on a label on the driver's doorjamb.
For additional information about your
tires, see page454.
Tires41608/06/06 16:58:07 09 ACURA MDX MMC North America Owner's M 50 31STX620 enu
2009 MDX

Tire Inspection
Every time you check inflation, you
should also examine the tires for
damage, foreign objects, and wear.
You should look for:●Bumps or bulges in the tread or
side of the tire. Replace the tire if
you find either of these conditions.●Cuts, splits, or cracks in the side of
the tire. Replace the tire if you can
see fabric or cord.●Excessive tread wear.
Your tires have wear indicators
molded into the tread. When the
tread wears down, you will see a 1/2
inch (12.7 mm) wide band across the
tread. This shows there is less than
1/16 inch (1.6 mm) of tread left on
the tire.
A tire this worn gives very little
traction on wet roads. You should
replace the tire if you can see three
or more tread wear indicators.Tire Service Life
The service life of your tires is
dependent on many factors,
including, but not limited to, driving
habits, road conditions, vehicle
loading, inflation pressure,
maintenance history, speed, and
environmental conditions (even
when the tires are not in use).
In addition to your regular
inspections and inflation pressure
maintenance, it is recommended that
you have annual inspections
performed once the tires reach five
years old. It is also recommended
that all tires, including the spare, be
removed from service after 10 years
from the date of manufacture,
regardless of their condition or state
of wear.
The last four digits of the TIN (tire
identification number) are found on
the sidewall of the tire and indicate
the date of manufacture (See
Tire
Labeling on page456).
INDICATOR LOCATION MARKS
TREAD WEAR INDICATORS
CONTINUED
Tires
417
Maint enance
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2009 MDX

Tire Maintenance
In addition to proper inflation, correct
wheel alignment helps to decrease
tire wear. If you find a tire is worn
unevenly, have your dealer check the
wheel alignment.
Have your dealer check the tires if
you feel a consistent vibration while
driving. A tire should always be
rebalanced if it is removed from the
wheel. When you have new tires
installed, make sure they are
balanced. This increases riding
comfort and tire life. For best results,
have the installer perform a dynamic
balance.Improper wheel weights can damage
your vehicle's aluminum wheels. Use
only Acura wheel weights for
balancing.Tire Rotation
To help increase tire life and
distribute wear more evenly, rotate
the tires according to the
maintenance messages displayed on
the multi-information display. Move
the tires to the positions shown in
the illustration each time they are
rotated. If you purchase directional
tires, rotate only front-to-back.
Replacing Tires and Wheels
Replace your tires with radial tires of
the same size, load range, speed
rating, and maximum cold tire
pressure rating (as shown on the
tire's sidewall).
Mixing radial and bias-ply tires on
your vehicle can reduce braking
ability, traction, and steering
accuracy. Using tires of a different
size or construction can cause the
ABS and vehicle stability assist
system (VSA) to work inconsistently.
The ABS works by comparing the
speed of the wheels. When replacing
tires, use the same size originally
supplied with the vehicle. Tire size
and construction can affect wheel
speed and may cause the system to
activate.
When the tires are rotated, make
sure the air pressures are checked.
Front Front
(For Non-directional
Tires and Wheels) (For Directional
Tires and Wheels)
Tires41808/06/06 16:58:07 09 ACURA MDX MMC North America Owner's M 50 31STX620 enu
2009 MDX

It is best to replace all four tires at
the same time. If that is not possible
or necessary, replace the two front
tires or two rear tires as a pair.
Replacing just one tire can seriously
affect your vehicle's handling.
If you ever replace a wheel, make
sure that the wheel's specifications
match those of the original wheels.
Also be sure you use only TPMS
specific wheels. If you do not, the tire
pressure monitoring system will not
work.
Replacement wheels are available at
your dealer.
Installing improper tires on your
vehicle can affect handling and
stability. This can cause a crash
in which you can be seriously
hurt or killed.
Always use the size and type of
tires recommended in this
owner's manual.
Wheel and Tire Specifications
Wheel: 18 x 8 J
Tires: P255/55R18 104H
See page454for information about
DOT Tire Quality Grading, and page
456for tire size and labeling
information. Winter Driving
Tires marked
‘‘M ＋ S’’ or ‘‘All
Season ’’on the sidewall have an all-
weather tread design suitable for
most winter driving conditions.
For the best performance in snowy
or icy conditions, you should install
snow tires or tire chains. They may
be required by local laws under
certain conditions.
Snow Tires
If you mount snow tires on your
vehicle, make sure they are radial
tires of the same size and load range
as the original tires. Mount snow
tires on all four wheels. The traction
provided by snow tires on dry roads
may be lower than your original tires.
Check with the tire dealer for
maximum speed recommendations.
CONTINUED
Tires
419
Maint enance
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2009 MDX

This section covers the more
common problems that motorists
experience with their vehicles. It
gives you information about how to
safely evaluate the problem and what
to do to correct it. If the problem has
stranded you on the side of the road,
you may be able to get going again. If
not, you will also find instructions on
getting your vehicle towed.Compact Spare Tire
....................
424
Changing a Flat Tire
...................
425
If the Engine Won't Start
.............
431
Jump Starting
..............................
432
If the Engine Overheats
..............
434
Low Oil Pressure Indicator
.........
436
Charging System Indicator
.........
436
Malfunction Indicator Lamp
........
437
Brake System Indicator
...............
438
Fuses
..........................................
439
Fuse Locations
............................
443
Opening the Fuel Fill Door Manually
.................................
446
Emergency Towing
.....................
446
If Your Vehicle Gets Stuck
..........
447
Taking Care of the Unexpected
423
T aking Care of t he Unexpect ed
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2009 MDX

Use the compact spare tire as a
temporary replacement only. Get
your regular tire repaired or
replaced, and put it back on your
vehicle as soon as you can.
Check the inflation pressure of the
compact spare tire every time you
check the other tires. It should be
inflated to:
60 psi (420 kPa, 4.2 kgf/cm
2)
Follow these precautions:
●Never exceed 50 mph (80 km/h).●This tire gives a harsher ride and
less traction on some road
surfaces. Use greater caution while
driving.
●Do not mount snow chains on a
compact spare.●Do not use your compact spare tire
on another vehicle unless it is the
same make and model.●After the flat tire is replaced with
the spare tire, the low tire
pressure/TPMS indicator stays on.
After several miles (kilometers)
driving with the spare, this
indicator begins to flash, then
stays on again. You will also see a
‘‘ CHECK TPMS SYSTEM’’
message on the multi-information
display (see page354).
Replace the tire when you can see
the tread wear indicator bars. The
replacement should be the same size
and design tire, mounted on the
same wheel. The spare tire is not
designed to be mounted on a regular
wheel, and the spare wheel is not
designed for mounting a regular tire.INDICATOR LOCATION MARK
TREAD WEAR INDICATOR BAR
Compact Spare Tire42408/06/06 16:58:07 09 ACURA MDX MMC North America Owner's M 50 31STX620 enu
2009 MDX

The diagrams in this section give you
the dimensions and capacities of
your vehicle and the locations of the
identification numbers. It also
includes information you should
know about your vehicle's tires and
emissions control systems.Identification Numbers
...............
450
Specifications
..............................
452
DOT Tire Quality Grading (U.S. Vehicles)
.................................
454
Tire Labeling
..............................
456
Tire Pressure Monitoring System
(TPMS) －Required Federal
Explanation
.........................
458
Emissions Controls
.....................
460
Three Way Catalytic Converter
................................
462
Emissions Testing
.......................
463
Technical Information
449
T echnical Inf ormat ion
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2009 MDX

LightsHeadlights High 12 V－60 W (HB3)
Low
ꭧ
12 V －35 W (D2S)
Daytime running lights 12 V－60 W (HB3)
Front side marker lights 12 V－3CP
Front turn signal lights 12 V－21 W
Parking lights 12 V－3CP
Fog light 12 V－55 W (H11)
Rear turn signal lights 12 V－21 W
Rear side marker lights 12 V－3CP
Backup lights 12 V－18 W
License plate lights 12 V－3CP
Individual map lights Front 12 V －5W
Rear 12 V －5W
Cargo area lights 12 V－8W
Tailgate lights 12 V－3.4 W
Vanity mirror lights 12 V－2W
Door lights 12 V－3.4 W
ꭧ : The low beam headlights are high voltage discharged type.
Replacement of a low beam headlight bulb should be performed by
your dealer.
Battery Capacity 12 V－65AH/5 HR
12 V －76AH/20 HR
Fuses
Interior See page445or the fuse label attached
to the inside of the fuse box lid.
Rear See page444or the fuse label attached
to the inside of the fuse box lid.
Under-hood See page443and 444or the fuse box
cover.
Engine Type Water-cooled, 4-stroke SOHC VTEC V6
gasoline engine
Bore x Stroke 3.54 x 3.78 in (90.0 x 96.0 mm)
Displacement 223.5 cu-in (3,664 cm
3)
Compression ratio 11.0 : 1
Spark plugs DENSO:
NGK:SKJ20DR-M11
IZFR6K11
Alignment Toe-in Front 0.00 in (0.0 mm)
Rear 0.08 in (2.0 mm)
Camber Front －0°30’
Rear －0°30’
Caster Front 4 ° 12’
Tires Size Front/Rear P255/55R18 104H
Spare T165/80D17 104M
Pressure Front/Rear 32 psi (220 kPa, 2.2 kgf/cm2)
Spare 60 psi (420 kPa, 4.2 kgf/cm2)
Specifications
453
T echnical Inf ormat ion
08/06/06 16:58:07 09 ACURA MDX MMC North America Owner's M 50 31STX620 enu
2009 MDX