engine BMW 745LI SEDAN 2002 Owner's Guide

Under the hood
176
Engine compartment 1Engine oil dipstick, refer to next column
2Brake fluid reservoir, located beneath
the microfilter cover178
3Reservoir for windshield and headlamp
washer system73
4Engine oil filler neck177
5Coolant expansion tank178
6Jump-starting terminal187 Engine oilChecking oil level1.Park the vehicle on a level surface
2.Switch the engine off after it has
reached normal operating temperature 3.After approx. 5 minutes, pull the dipstick
out and wipe it off with a clean lint-free
cloth, paper towel, or similar material
4.Carefully push the dipstick all the way
into the guide tube and pull it out again
5.The oil should extend to between the
two marks on the disptick
As is the case with fuel economy, the rate
at which the engine uses oil is strongly
influenced by driving style and operating
conditions.
The space between the two marks on
the dipstick corresponds to approx.
1.1 US quarts (1 litre). Do not fill beyond
the upper mark on the dipstick. Excess oil
can damage the engine.

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177
Adding engine oil Wait until the level has dropped to just
above the lower mark before adding oil.
BMW engines are designed to
operate without additives, and their
use could even lead to damage in some
cases. This also applies to the automatic
transmission, the differential and the power
steering system.<
Recommendation: have your oil changed at
your BMW center.
Continuous exposure to used oil has
caused cancer in laboratory testing.
For this reason, any skin areas that come
into contact with oil should be thoroughly
washed with soap and water.
Always store oil, grease, etc., well out of
the reach of children; always observe all
warning labels on the containers.<
Please observe all environmental-
protection rules and regulations when
disposing of used oil.< Specified engine oils The quality of the engine oil selected has
critical significance for the operation and
service life of an engine. BMW approves
only specific oils after confirming their suit-
ability for use in its vehicles with extensive
testing.
Use only approved BMW High Perfor-
mance Synthetic Oil.
If you are unable to obtain BMW High
Performance Synthetic Oil, you can add
small amounts of another synthetic oil
between oil changes. Use only oils with the
API SH specification or higher. Ask your BMW center for details
concerning the specific BMW High
Performance Synthetic Oil or synthetic oils
which have been approved.<
You can also call BMW of North America at
1-800-831-1117 or visit this website:
www.bmwusa.com to obtain this informa-
tion.
Viscosity ratingsViscosity is the oil flow rating as defined in
SAE classes.
The selection of the correct SAE class
depends on the climatic conditions in the
area where you typically drive your BMW.
Approved oils are in SAE classes
5W-40 and 5W-30.<
These oils may be used for driving in all
ambient temperatures.Coolant
Do not add coolant to the cooling
system when the engine is hot.
Escaping coolant can cause burns.
To avoid the possibility of damage later on,
never use anything other than factory-
approved, nitrite and amino-free extended-
duty antifreeze with corrosion inhibitor.
Your BMW center is familiar with the official
specifications.
Antifreeze and anticorrosion agents are
hazardous to health. Always store these
agents in tightly-closed original containers
kept well away from the reach of children.
Extended-duty antifreeze with corrosion
inhibitor contains ethylene glycol Ð a flam-
mable substance. For this reason, do not
spill antifreeze with corrosion inhibitor on
hot engine parts. It could ignite and cause
serious burns.<
Always observe all applicable rules
and regulations for environmental
protection when disposing of used
extended-duty antifreeze with corrosion
inhibitor.<

Under the hood
178
Checking coolant level Correct coolant level with the engine cold Ð
approx. 58 7 (20 6):
1.Turn the cap of the expansion tank
counterclockwise to allow any accumu-
lated pressure to escape, then continue
turning to open
2.The coolant level is correct when the
coolant extends to between the MIN and
MAX marks on the filler neck, refer to the
diagram adjacent to the filler neck
3.If the coolant is low, slowly add coolant
up to the specified level Ð do not overfill. Brake fluid
The symbol lights up and a
message appears in the Check
Control panel:
The brake fluid in the reservoir has fallen to
below the minimum level.
The brake fluid reservoir is located under
the microfilter housing trim panel on the
driver's side of the vehicle. To have brake
fluid added to the system, or to have the
source of any brake fluid loss traced and
rectified, please contact your BMW center,
which can also supply the factory-
approved DOT 4 brake fluids.
Brake fluid is hygroscopic: it absorbs
moisture from the atmosphere over
the course of time.
To ensure that the brake system continues
to provide safe and reliable performance,
remember to have the brake fluid changed
every two years at the latest, refer to
page 79 and to the Service and Warranty
Information Booklet (US models) or the Warranty and Service Guide Booklet
(Canadian models).
Brake fluid is toxic and also damages
vehicle paintwork. Always store brake fluid
in tightly-closed original containers kept
well away from the reach of children.
Do not spill the fluid and do not refill the
brake fluid reservoir to beyond the MAX
mark. Should it come into contact with hot
engine components, the brake fluid could
ignite and cause personal injury in the form
of burns.<
Always observe all applicable envi-
ronmental rules and regulations when
disposing of used brake fluid.<
A low brake-fluid level combined with
longer-than-usual pedal travel could be a
sign that one of the brake system's
hydraulic circuits has failed.
Proceed to the nearest BMW center.
Remember that pedal travel may be
increased, and there may also be a
substantial increase in the amount of pedal
pressure required to brake the vehicle.
Please adapt your driving style accord-
ingly.<
Warning lamp for Canadian models

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179
Maintenance The BMW Maintenance
System The BMW Maintenance System is
designed to ensure that your vehicle will
continue to furnish consistent reliability
combined with optimal safety. The service
schedule also includes operations related
to the vehicle's comfort and convenience
features, such as replacement of the filters
for the inside air. The ultimate objective is
to furnish economical maintenance by
providing the ideal service for your indi-
vidual vehicle.
Should the day come when you decide to
sell your BMW, you will find that a complete
dealer service history is an asset of great
value. CBS Condition Based Service CBS is a more advanced version of the
Service Interval Display. Sensors combine
with highly-specialized algorithms to
supply service information that reflects
your vehicle's actual operating conditions
more precisely than ever before.
The system now furnishes individual
displays of the times remaining until the
deadlines for specific service operations as
well as official state inspections:
>Engine oil
>Brakes Ð separate for front and rear
>Microfilter/activated-charcoal filter
>Brake fluid >Coolant
>Spark plugs
>Vehicle check
>Official state inspections
CBS monitors both current and upcoming
service requirements. After accessing the
data stored in the vehicle's key, your BMW
service advisor is able to suggest precisely
the right array of service procedures for
your own individual vehicle.
By letting you define a service and mainte-
nance regimen that reflects your own indi-
vidual requirements, Condition Based
Service builds the basis for troublefree
driving.
You can find more detailed information on
the Service Interval Display on page 78.
Service and Warranty Information
Booklet (US models) and Service
Guide Booklet (Canadian models) Please consult your Service and Warranty
Information Booklet (US models) and
Service Guide Booklet (Canadian models)
for additional information on service
requirements.
Have service and repair operations
performed at your BMW center.
Take the time to ensure that these service
procedures are confirmed by entries in
your vehicle's Service and Warranty Infor-
mation Booklet (US models) and Service
Guide Booklet (Canadian models). These
entries verify that your vehicle has received
the specified regular maintenance, and
may also be required when submitting
warranty claims.< Care You can find everything you need to know
on this topic by consulting the separate
"Car care" manual.

Rules and regulations
180
Rules and regulationsCalifornia Proposition 65
Warning California laws require us to state the
following warning:
Engine exhausts, some of its constit-
uents, and certain vehicle compo-
nents contain or emit chemicals known to
the State of California to cause cancer and
birth defects or other reproductive harm.< OBD connector The Onboard Diagnostic (OBD) interface
socket is located on the left of the driverÕs
side under the instrument panel and under
a cover.
The cover has the letters OBD on it.
The purpose of the OBD system is to
ensure proper operation of the emission
control system for the vehicleÕs lifetime.
The system monitors emission-related
components and systems for deterioriation
and malfunction.
An illuminated lamp informs you of
the need for service, not of the need
to stop the vehicle. However, the
systems should be checked by your BMW
center at the earliest possible opportunity.
Under certain conditions, the indicator will
blink or flash. This indicates a rather severe
level of engine misfire. When this occurs,
you should reduce speed and consult the nearest BMW center as soon as possible.
Severe engine misfire over only a short
period of time can seriously damage emis-
sions control components, especially the
catalytic converter.
When the fuel filler cap is not properly
tightened, the OBD system can
detect the vapor leak and the indicator will
light up. If the filler cap is subsequently
tightened, the indicator should go out
within a few days.<

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181
Replacing componentsOnboard tool kitThe onboard tool kit is located in the
luggage compartment lid.
Loosen the wingnut to open. Windshield wiper blades To replace the blades, start by folding the
wipers out and away from the windshield,
refer to page 72.
Use only wiper blades that have been
approved by BMW.< Lamps and bulbsThe lamps and bulbs are essential factors
contributing to the safety of your vehicle.
Therefore, comply fully with the following
instructions during bulb replacement. If you
are not familiar with the specified proce-
dures, have the replacements carried out at
your BMW center.
Never touch the glass on new bulbs
with your bare fingers, as even minute
amounts of contamination will burn into the
bulb's surface and reduce its service life.
Use a clean cloth, napkin, etc., or hold the
bulb by its metal socket.<
You can obtain a selection of replacement
bulbs at your BMW center.
To prevent short circuits, before
working on any electrical system,
equipment or accessory you should always switch it off and disconnect the cable from
the battery's negative terminal before
starting.
To avoid possible injury or equipment
damage when changing bulbs, always
observe any instructions provided by the
bulb manufacturer.<
When caring for your headlamps:
>Do not clean by wiping with a dry
cloth (scratches). Never use abrasives or
strong solvents to clean the covers
>Remove contaminants such as dead
insects by soaking with BMW Shampoo
and then washing off with plenty of water
>Remove ice by thawing with a deicer
spray Ð never use an ice scraper.<
Headlamps Engine compartment, left side:
Turn the quick-release clamps, see arrows,
905 counterclockwise and remove the
cover.
After replacing the bulb return the cover to
its original position and press the quick-
release clamps down.

Replacing components
182
Release the lamp cover The illustration shows the left-hand side of
the engine compartment.
1High beams
Press the tab down, see arrow.
Always wear gloves and eye protec-
tion Ð the atmosphere within the bulb
is pressurized. Failure to observe this
precaution can lead to personal injury
should the bulb be damaged.< 1 High beams H7 bulb, 55 watts
1.Remove the cover
2.Turn the bulb holder to the left and
remove
3.Remove and replace the bulb. Xenon lamps

The service life of these bulbs is very long
and the probability of a failure is very low,
provided that they are not switched on and
off an unusual number of times. In the
unlikely event that one of these lamps
should fail, you can respond by switching
on your fog lamps and proceeding carefully
(where allowed by law). To avoid risk of potentially fatal inju-
ries: owing to the extremely high volt-
ages at which these units operate, service
work should always be entrusted to quali-
fied personnel.<
Parking and standing lamps In the event of a malfunction, please
contact your BMW center. Turn signal indicator, front Two bulbs 21 watt Ð P 21 W
1.Turn the bulb holder to the left and
remove
2.Apply gentle pressure to the bulb while
turning it to the left for removal and
replacement. Side-mounted turn signal indicators Bulb, 5 watts Ð W 5 W
1.Press against the front edge of the bulb
with the tip of your finger, then push it to
the rear and release the detent at the front
2.Turn the lamp 903 and remove
3.Turn the bulb holder to the left and
remove
4.Extract the bulb for replacement.

Replacing components
184 the jack could slip to the side if you attempt
to raise the vehicle on a soft or slippery
surface such as snow, ice, tiles, etc.
Position the jack on a firm support surface.
Do not use a wooden block or similar
object as a support base for the jack, as
this would prevent it from extending to its
full support height and reduce its load-
carrying capacity .
To avoid serious or fatal injury: never lie
under the vehicle, and never start the
engine while it is supported by the jack.<
What you will need To avoid rattling noises, note the positions
of the tools before removing them, then
return them to their initial positions after
completing work.
>Lug wrench
It is stored within the spare tire area
>Wheel chock
The chock is located next to the spare tire,
or behind the trim panel on the left side of
the luggage compartment on vehicles
equipped with a trailer coupling.
Remove the floor mat and the cover above
the spare tire.
Unscrew the wingnut and remove the
wheel chock >Vehicle jack
The jack is located behind the side trim
panel on the right side of the luggage
compartment. Grasp the handle in the
upper panel and fold it down.
Undo the wingnut, see arrow, and remove
the jack.
After use, screw the jack all the way back
down and snap the handle back into place.
Spare tire 1.Undo the wingnut 1
2.Remove the disk 2 to the side
3.Unscrew the threaded rod 3 to remove it
4.Remove the wheel. Procedure 1.Read carefully and comply with the
safety precautions on page 183.
2.Secure the vehicle to prevent it from
rolling: place the wheel chock against the
rear surface of the front tire on the side
opposite the side being raised. If the
vehicle is parked on a downward slope,
place the wheel chock securely in front of
the tire. If the wheel must be changed on a
surface with a more severe slope, take

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185
additional precautions to secure the
vehicle from rolling.
3.Loosen the lug bolts 1/2 a turn
4.Set up the jack beneath the jacking
point closest to the flat tire. Ensure that the
entire surface of the jack's base is in firm
contact with the ground and that the jack
itself is standing completely vertical (not
tilted), and that the fitting on the top of the
jack will align with the rectangular recess
on the vehicle when you raise it, refer to
illustration
5.Jack the vehicle up until the wheel you
are changing is raised from the ground
6.Unscrew the lug bolts and remove the
wheel
7.Remove accumulations of mud or dirt
from the mounting surfaces of the wheel
and hub. Clean the lug bolts
8.Position the spare wheel. Secure the
wheel by turning at least two lug bolts into
opposite bolt holes
9.Screw in the remaining lug bolts.
Tighten all the bolts securely in a diagonal
pattern
10.Lower the jack and remove it from
beneath the vehicle.
11.Tighten the lug bolts in a diagonal
pattern
12.Check and correct the tire inflation
pressure at the earliest opportunity.
Protect valve stems and valve stem
seal caps against dirt and contamina-
tion. Dirt in valve stems is a frequent source
of gradual air loss.
Vehicles with RDC Tire Pressure Monitor:
After mounting a spare tire or correcting the inflation pressure(s) always remember
to reinitialize the system, refer to page 92.
The vehicle jack is designed for
changing wheels only. Do not attempt
to raise another vehicle model with it or to
raise any load of any kind. To do so could
cause accidents and personal injury.
To ensure safety, always have the lug bolts
checked with a calibrated torque wrench to
ensure that they are tightened to the spec-
ified torque of 140 Nm as soon as
possible.<
Reverse the removal sequence to store the
wheel and tools in the vehicle.
When you mount wheels other than Orig-
inal BMW light-alloy wheels, different lug
bolts may also be required.
Always have damaged tires replaced and
the wheel and tire assembly rebalanced at
the earliest possible opportunity.
Battery Battery care The battery is 100% maintenance-free, i. e.,
the electrolyte will last for the life of the
battery when the vehicle is operated in a
temperate climate.
For all questions that regard the
battery, please consult your BMW
center. Since the battery is maintenance-
free, the following is for your information
only.< Charging the battery Only charge the battery in the vehicle via
the terminals in the engine compartment
with the engine off. Connections, refer to
Jump starting on page 187.
To avoid short circuits, as well as
possible fires and personal injury,
always disconnect the cable from the
battery's negative terminal before working
on the vehicle's electrical system.<

Replacing components
186
Battery switch Before storing the vehicle for an extended
period of several weeks or more, slide the
battery switch located behind the trim
panel on the right side of the luggage
compartment to OFF. This reduces the
current flow from the battery for the period
during which the vehicle remains parked.
A message appears in the Check Control
panel. Please take note of the supplemen-
tary information provided in the Control
Display.
Never disconnect either battery cable
from its terminal while the engine is
running Ð the resulting voltage surge would
destroy the vehicle's electronic systems.<
Return used batteries to a recycling
point or your BMW center. Maintain
the battery in an upright position for trans-
port and storage. Always restrain the
battery to prevent it from tipping over
during transport.< Fuses In the glove compartment Press the tab on the cover, see arrow, to
the front, then fold up the cover. Spare fuses and a set of tweezers are located
next to the fuse strip.
Never attempt to repair a blown fuse,
and do not replace a defective fuse
with a substitute of another color or
amperage rating, as this could lead to a
circuit overload, ultimately resulting in a fire
in the vehicle.<
In the luggage compartment Use the handle to pull down the trim on the
right wall.