Page 3 of 374
Customer Assistance 314
Reporting safety defects (U.S. only) 320
Reporting safety defects (Canada only) 321
Cleaning 322
Maintenance and Specifications 329
Engine compartment 331
Engine oil 333
Battery 336
Engine coolant 339
Fuel information 345
Air filter(s) 359
Part numbers 361
Maintenance product specifications and capacities 362
Engine data 364
Accessories 367
Index 369
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Table of Contents
3
2009 Flex(471)
Owners Guide (post-2002-fmt)
USA(fus)
Page 9 of 374
Vehicle Symbol Glossary
Power Windows
Front/Rear
Power Window Lockout
Child Safety Door
Lock/UnlockInterior Luggage
Compartment Release
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
Service Engine SoonEngine Air Filter
Passenger Compartment
Air FilterJack
Check Fuel CapLow Tire Pressure
Warning
2009 Flex(471)
Owners Guide (post-2002-fmt)
USA(fus)
Introduction
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Page 331 of 374
IDENTIFYING COMPONENTS IN THE ENGINE COMPARTMENT
1. Power steering fluid reservoir
2. Engine coolant reservoir
3. Brake fluid reservoir
4. Battery
5. Power distribution box
6. Air filter assembly
7. Automatic transmission fluid dipstick
8. Engine oil dipstick
9. Engine oil filler cap
10. Windshield washer fluid reservoir
2009 Flex(471)
Owners Guide (post-2002-fmt)
USA(fus)
Maintenance and Specifications
331
Page 344 of 374

When this occurs the vehicle will still operate. However:
•The engine power will be limited.
•The air conditioning system will be disabled.
Continued operation will increase the engine temperature and the engine
will completely shut down, causing steering and braking effort to
increase.
Once the engine temperature cools, the engine can be re-started. Take
your vehicle to a service facility as soon as possible to minimize engine
damage.
When fail-safe mode is activated
You have limited engine power when in the fail-safe mode, so drive the
vehicle with caution. The vehicle will not be able to maintain high-speed
operation and the engine will run rough. Remember that the engine is
capable of completely shutting down automatically to prevent engine
damage, therefore:
1. Pull off the road as soon as safely possible and turn off the engine.
2. Arrange for the vehicle to be taken to a service facility.
3. If this is not possible, wait a short period for the engine to cool.
4. Check the coolant level and replenish if low.
WARNING:Never remove the coolant reservoir cap while the
engine is running or hot.
5. Re-start the engine and take your vehicle to a service facility.
Driving the vehicle without repairing the engine problem
increases the chance of engine damage. Take your vehicle to a
service facility as soon as possible.
FUEL FILTER
Your vehicle is equipped with a lifetime fuel filter that is integrated with
the fuel tank. Regular maintenance or replacement is not needed.
2009 Flex(471)
Owners Guide (post-2002-fmt)
USA(fus)
Maintenance and Specifications
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Page 359 of 374

The transmission fluid should be
within the cross-hatch area if at
normal operating temperature 149°F
(65°C).
High fluid level
Fluid levels above the safe range
may result in transmission failure.
An overfill condition of transmission
fluid may cause shift and/or
engagement concerns and/or possible damage.
High fluid levels can be caused by an overheating condition.
Adjusting automatic transmission fluid levels
Before adding any fluid, make sure the correct type is used. The type of
fluid used is normally indicated on the dipstick and also in the
Maintenance product specifications and capacitiessection in this
chapter.
Use of a non-approved automatic transmission fluid may cause
internal transmission component damage.
If necessary, add fluid in 1/2 pint
(250 ml) increments through the
filler tube until the level is correct.
If an overfill occurs, excess fluid
should be removed by an authorized
dealer.
An overfill condition of
transmission fluid may cause shift and/or engagement concerns
and/or possible damage.
Do not use supplemental transmission fluid additives, treatments or
cleaning agents. The use of these materials may affect transmission
operation and result in damage to internal transmission components.
AIR FILTER
Refer toscheduled maintenance informationfor the appropriate
intervals for changing the air filter element.
When changing the air filter element, use only the Motorcraft air filter
element listed. Refer toMotorcraft part numbersin this chapter.
2009 Flex(471)
Owners Guide (post-2002-fmt)
USA(fus)
Maintenance and Specifications
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Page 360 of 374

WARNING:To reduce the risk of vehicle damage and/or
personal burn injuries do not start your engine with the air
cleaner removed and do not remove it while the engine is running.
Changing the air filter element
1. Release the clamps that secure
the air filter housing cover.
2. Carefully separate the two halves
of the air filter housing.
3. Remove the air filter element
from the air filter housing.
4. Wipe the air filter housing and
cover clean to remove any dirt or
debris and to ensure good sealing.
5. Install a new air filter element. Be
careful not to crimp the filter element edges between the air filter
housing and cover. This could cause filter damage and allow unfiltered
air to enter the engine if not properly seated.
6. Replace the air filter housing
cover and secure the clamps. Be
sure that the air cleaner cover tabs
are engaged into the slots of the air
cleaner housing.
Note:Failure to use the correct air filter element may result in severe
engine damage. The customer warranty may be void for any damage to
the engine if the correct air filter element is not used.
2009 Flex(471)
Owners Guide (post-2002-fmt)
USA(fus)
Maintenance and Specifications
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Page 361 of 374

MOTORCRAFT PART NUMBERS
Component 3.5L V6 Engine
Engine air filter element FA-1884
Battery BXT-65–750
Oil filter FL-400-S
PCV valve EV-257
1
Spark plugs SP-4112
1
The PCV valve is a critical emission component. It is one of the items
listed inscheduled maintenance informationand is essential to the
life and performance of your vehicle and to its emissions system.
For PCV valve replacement, see your authorized dealer. Refer to
scheduled maintenance informationfor the appropriate intervals for
changing the PCV valve.
Replace the PCV valve with one that meets Ford material and
design specifications for your vehicle, such as a Motorcraft or
equivalent replacement part. The customer warranty may be void
for any damage to the emissions system if such a PCV valve is not
used.
2For spark plug replacement, see your authorized dealer. Refer to
scheduled maintenance informationfor the appropriate intervals for
changing the spark plugs.
Replace the spark plugs with ones that meet Ford material and
design specifications for your vehicle, such as Motorcraft or
equivalent replacement parts. The customer warranty may be
void for any damage to the engine if such spark plugs are not
used.
2009 Flex(471)
Owners Guide (post-2002-fmt)
USA(fus)
Maintenance and Specifications
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Page 369 of 374

A
Accessory delay ..........................98
AdvanceTrac ..............................257
Air cleaner filter ...............359–361
Air conditioning ..............64, 67, 70
manual heating and air
conditioning system .................64
Airbag supplemental restraint
system ................181–182, 190, 192
and child safety seats ............183
description ..............182, 190, 192
disposal ....................................196
driver airbag ............184, 191, 194
indicator light .................190, 195
operation .................184, 191, 194
passenger airbag .....184, 191, 194
side airbag ...............................190
All Wheel Drive (AWD),
driving off road .........................271
Ambient mood/lighting ...............81
AM/FM .........................................16
Antifreeze
(see Engine coolant) ................339
Anti-lock brake system
(see Brakes) ..............................255
Anti-theft system ..............142, 145
arming the system ..................145
disarming a triggered
system .....................................147
Audio system (see Radio) .........16
Automatic transaxle
fluid, refill capacities ..............362
fluid, specification ..................362
Automatic transmission
driving an automatic
overdrive .................................264
fluid, adding ............................358fluid, checking ........................358
Auxiliary input jack (Line in) ....25
B
Battery .......................................336
acid, treating emergencies .....336
jumping a disabled battery ....307
maintenance-free ....................336
replacement, specifications ...361
servicing ..................................336
Belt-Minder.............................177
Booster seats .............................212
Brakes ........................................255
anti-lock ...................................255
anti-lock brake system (ABS)
warning light ...........................256
fluid, checking and adding ....357
fluid, refill capacities ..............362
fluid, specifications .................362
lubricant specifications ..........362
parking ....................................256
shift interlock ..........................262
Bulbs ............................................82
C
Capacities for refilling fluids ....362
Cargo net ...................................123
CD ................................................16
Cell phone use ..............................7
Child safety seats ......................201
in front seat ............................202
in rear seat ..............................202
LATCH .....................................205
recommendations ...................199
tether anchorage hardware ...207
Child safety seats - booster
seats ...........................................212
2009 Flex(471)
Owners Guide (post-2002-fmt)
USA(fus)
Index
369