Page 9 of 240
Vehicle Symbol Glossary
Child Safety Door
Lock/Unlock
Interior Luggage
Compartment
Release Symbol
Panic AlarmEngine Oil
Engine CoolantEngine Coolant
Temperature
Do Not Open When
HotBattery
Avoid Smoking,
Flames, or SparksBattery Acid
Explosive GasFan Warning
Power Steering
FluidMaintain Correct
Fluid LevelMAX
MIN
Emission SystemEngine Air Filter
Passenger
Compartment Air
FilterJack
Check fuel capLow tire warning
2004 Mustang(mus)
Owners Guide (post-2002-fmt)
USA English(fus)
Introduction
9
Page 15 of 240
•Optional instrument
cluster
•Mach 1 instrument
cluster
Engine coolant
temperature gauge:
Indicates engine
coolant temperature. At
normal operating temperature, the needle will be in
the normal range (between“H”and“C”). If it enters
the red section, the engine is overheating. Stop the
vehicle as soon as safely possible, switch off the
engine and let the engine cool.
Never remove the coolant reservoir cap
while the engine is running or hot.
Odometer:Registers
the total kilometers
(miles) of the vehicle.
Trip odometer:
Registers the
kilometers (miles) of
individual journeys.
Press and release the
reset button until a“T”
appears in the display.
Press and hold the button for three seconds to reset.
CH
0
00000 00
4
5
6
7
8 3
2
1RPMX1000
SELECT/RESET
.
2004 Mustang(mus)
Owners Guide (post-2002-fmt)
USA English(fus)
Instrument Cluster
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Page 103 of 240

Starting the engine
1. Turn the key to 4
(ON) without turning
the key to 5 (START).
2. Turn the key to 5
(START), then release
the key as soon as the
engine starts.
Excessive cranking
could damage the starter.
Note:If the engine does not start within five
seconds on the first try, turn the key to 3 (OFF),
wait 10 seconds and try again. If the engine still fails
to start, press the accelerator to the floor and try
again; this will allow the engine to crank with the
fuel shut off in case the engine is flooded with fuel.
Using the engine block heater (if equipped)
An engine block heater warms the engine coolant
which aids in starting and heater/defroster
performance. Use of an engine block heater is
strongly recommended if you live in a region where
temperatures reach -23°C (-10°F) or below. For
best results, plug the heater in at least three hours
before starting the vehicle. The heater can be
plugged in the night before starting the vehicle.
To reduce the risk of electrical shock, do not
use your heater with ungrounded electrical
systems or two-pronged (cheater) adapters.
Guarding against exhaust fumes
Carbon monoxide is present in exhaust fumes. Take
precautions to avoid its dangerous effects.
If you smell exhaust fumes inside your
vehicle, have your dealer inspect your
vehicle immediately. Do not drive if you smell
exhaust fumes.
3
2
1
5
4
2004 Mustang(mus)
Owners Guide (post-2002-fmt)
USA English(fus)
Driving
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IDENTIFYING COMPONENTS IN THE ENGINE
COMPARTMENT
OHV V6 engine
1. Engine oil filler cap
2. Engine oil dipstick
3. Brake fluid reservoir
4. Power distribution box
5. Windshield washer fluid reservoir
6. Battery
7. Power steering fluid reservoir
8. Engine coolant reservoir
9. Air filter assembly
10. Automatic transmission fluid dipstick (if
equipped)
6
1023
4
5
789
1
2004 Mustang(mus)
Owners Guide (post-2002-fmt)
USA English(fus)
Maintenance and Specifications
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Page 165 of 240
4.6L SOHC V8 engine
1. Engine oil dipstick
2. Brake fluid reservoir
3. Power distribution box
4. Windshield washer fluid reservoir
5. Battery
6. Engine coolant reservoir
7. Power steering fluid reservoir
8. Engine oil filler cap
9. Air filter assembly
10. Automatic transmission fluid dipstick (if
equipped)
2004 Mustang(mus)
Owners Guide (post-2002-fmt)
USA English(fus)
Maintenance and Specifications
165
Page 166 of 240
4.6L 4V V8 (Mach 1) engine
1. Engine oil filler cap
2. Brake fluid reservoir
3. Engine oil dipstick
4. Power distribution box
5. Windshield washer fluid reservoir
6. Battery
7. Engine coolant reservoir
8. Power steering fluid reservoir
9. Air filter assembly
10. Automatic transmission fluid dipstick (if
equipped)
2004 Mustang(mus)
Owners Guide (post-2002-fmt)
USA English(fus)
Maintenance and Specifications
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Page 167 of 240

WINDSHIELD WASHER FLUID
Add fluid to fill the
reservoir if the level is
low. In very cold
weather, do not fill the
reservoir completely.
Only use a washer fluid
that meets Ford
specification
WSB-M8B16–A2. Refer toLubricant specifications
in this chapter.
State or local regulations on volatile organic
compounds may restrict the use of methanol, a
common windshield washer antifreeze additive.
Washer fluids containing non-methanol antifreeze
agents should be used only if they provide cold
weather protection without damaging the vehicle’s
paint finish, wiper blades or washer system.
If you operate your vehicle in temperatures
below 4.5°C (40°F), use washer fluid with
antifreeze protection. Failure to use washer fluid
with antifreeze protection in cold weather could
result in impaired windshield vision and increase
the risk of injury or accident.
Note:Do not put washer fluid in the engine coolant
reservoir. Washer fluid placed in the cooling system
may harm engine and cooling system components.
ENGINE OIL
Checking the engine oil
Refer to the scheduled maintenance guide for the
appropriate intervals for checking the engine oil.
1. Make sure the vehicle is on level ground.
2. Turn the engine off and wait 5 to 10 minutes for
the oil to drain into the oil pan.
3. Set the parking brake and ensure the gearshift is
securely latched in P (Park) (automatic
transmissions) or 1 (First) (manual transmissions).
2004 Mustang(mus)
Owners Guide (post-2002-fmt)
USA English(fus)
Maintenance and Specifications
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•Always dispose of
automotive batteries
in a responsible
manner. Follow your
local authorized
standards for
disposal. Call your
local authorized
recycling center to find out more about recycling
automotive batteries.
ENGINE COOLANT
Checking engine coolant
The concentration and level of engine coolant should
be checked at the mileage intervals in the scheduled
maintenance guide. The coolant concentration
should be maintained at 50/50 coolant and water,
which equates to a freeze point of -36°C (-34°F).
Coolant concentration testing is possible with a
hydrometer or antifreeze tester (such as the
Rotunda Battery and Antifreeze Tester, 014–R1060).
The level of coolant should be maintained at the
“cold full”of“cold fill range”level in the coolant
reservoir. If the level falls below, add coolant per the
instructions in theAdding Engine Coolantsection.
Your vehicle was factory-filled with a 50/50 engine
coolant and water concentration. If the
concentration of coolant falls below 40% or above
60%, the engine parts could become damaged or not
work properly.A50–50 mixture of coolant and
water provides the following:
•freeze protection down to -36°C (-34°F)
•boiling protection up to 129°C (265°F)
•protection against rust and other forms of
corrosion
•enables calibrated gages to function properly
LEAD
RETURN
RECYCLE
2004 Mustang(mus)
Owners Guide (post-2002-fmt)
USA English(fus)
Maintenance and Specifications
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