ECU BMW 325xi SEDAN 2003 E46 Owner's Manual

Congratulations, and thank you for choosing a BMW.
Thorough familiarity with your vehicle will provide you with enhanced control and
security when you drive it. Therefore we have one request:
Please take the time to read this Owner's Manual and familiarize yourself with the
information that we have compiled for you before starting off in your new BMW. The
manual contains important data and instructions intended to assist you in obtaining
maximum satisfaction from your BMW's unique array of advanced technical fea-
tures. It also contains information on vehicle maintenance designed to enhance
operating safety while simultaneously helping you to maintain your BMW's value
throughout an extended service life. For additional information refer to the supple-
mental manuals.
This Owner's Manual should be considered a permanent part of this vehicle. It
should stay with the vehicle when sold to provide the next owner with important
operating, safety and maintenance information.
We wish you an enjoyable driving experience.
BMW AG

31
Opening and closing – via the remote controlThe conceptThe remote control gives you an excep-
tionally convenient method for unlock-
ing and locking your vehicle. Further-
more, it provides two additional
functions:
>To switch on interior lamps, refer to
page 32.
With this function you can also
search for your vehicle when parked
in an underground garage, for
instance
>To open the luggage compartment
lid, refer to page 32.
The luggage compartment lid will
open slightly, regardless of whether it
was previously locked or unlocked.
Whenever you unlock or lock the vehi-
cle, you simultaneously deactivate/acti-
vate the anti-theft system, disarm/arm
the alarm system and switch the interior
lamps on/off.
You can have a signal set to con-
firm that the vehicle's locks have
engaged securely.<
Master keys with remote control
Persons or animals inside the
vehicle may be able to lock the
doors from the inside. For this reason,
always take the vehicle keys with you
so that the vehicle can be opened again
from the outside at any time.<
If it is no longer possible to lock
the vehicle via the remote control,
the battery is discharged. Use this key
while driving for an extended period in
order to recharge the battery.
To prevent unauthorized use of the
remote control, surrender only the door
and ignition key or the spare key when
leaving the vehicle for valet parking, for
example.
In the event of a system malfunction,
please contact your BMW center. You
can also obtain replacement keys
there.<
1Unlock, convenience opening mode,
and disarm alarm system
2Lock and secure, arm alarm system,
activate interior lamps, disarm tilt
alarm sensor and interior motion sen-
sor
3Open the luggage compartment lid,
panic mode – trigger alarmTo releasePress the button once to unlock the
driver's door.
Press the button a second time to dis-
engage all vehicle locks.
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32
Convenience opening modePress and hold button: the power win-
dows and sliding/tilt sunroof are
opened.To lock and securePress button.To switch on the interior lampsWith the vehicle locked, press button.To deactivate the tilt alarm* and
interior motion sensors*Press button a second time immedi-
ately after locking.
For additional information, refer to
page 39.
To open the luggage
compartmentPress button.
The luggage compartment lid will open
slightly, regardless of whether it was
previously locked or unlocked.
Before and after a trip, be sure
that the luggage compartment lid
has not been opened unintentionally. armed, you can respond to imminent
danger by holding down the button for
more than 2 seconds.
To switch off the alarm:
Press button.External systemsThe remote control system's operation
may be affected by other units or
equipment operating in the immediate
vicinity of your vehicle.
If this should occur, you can still open
and close the vehicle using the master
key in either the door or luggage com-
partment lid locks.For US owners onlyThe transmitter and receiver units com-
ply with part 15 of the FCC Federal
Communications Commission regula-
tions. Operation is governed by the fol-
lowing:
FCC ID:
>LX8EWS
>LX8FZVS
>LX8FZVE.
Compliance statement:
This device complies with part 15 of the
FCC Rules. Operation is subject to the
following two conditions:
>This device may not cause harmful
interference, and
>this device must accept any interfer-
ence received, including interference
that may cause undesired operation.
Any unauthorized modifications to
these devices could void the
user's authority to operate the equip-
ment.<
Opening and closing – via the remote control

33
Opening and closing – via the door lockOne turn of the key in the driver's door
lock unlocks the driver's door only.
Turning the key a second time unlocks
all of the remaining doors, the luggage
compartment lid and the fuel filler door.
You can have a signal set to con-
firm that the vehicle's locks have
engaged securely. dows and the sliding/tilt sunroof via the
door lock.
>To open: with the door closed, hold
the key in the Unlock position
>To close: with the door closed, hold
the key in the Lock position.
Whenever closing the windows or
sliding/tilt sunroof you should
always monitor their path and progress
to ensure that no one is injured.
Release the key to stop the windows or
sliding/tilt sunroof.<
Manual operationIn the event of electrical malfunction
Turn the key to the extreme left or right
to unlock/lock the driver's door.
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35
Luggage compartment lidThe lockOnly the master keys fit in the lock for
the luggage compartment lid, refer to
page 30.
To secure separatelyTurn the master key to the right past the
resistance point and then pull it out in
the horizontal position.
This locks the luggage compartment lid
and disconnects it from the central
locking system. This feature can be
used to prevent unauthorized access to
the luggage compartment when you
surrender the door and ignition key
only, refer to page 30. This can be
advantageous for valet parking, for
example.
To open from the outsidePress the button in the handle recess –
see arrow: the luggage compartment lid
opens slightly.
The luggage compartment is lit when
the luggage compartment lid is opened.Manual operationIn the event of electrical malfunction
Turn the master key all the way to the
left – the luggage compartment lid will
open slightly.
The luggage compartment lid is locked
again as soon as you close the lid.
Refer also to "To open from the inside"
on page 36.
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38
Floor matYou can turn the floor mat over to trans-
port soiled objects, etc. The rubber-
coated side is suitable for washing and
is also designed to inhibit sliding.
The fittings at the corners of the lug-
gage compartment provide you with a
convenient means of attaching luggage
nets* and flexible straps for securing
luggage.
Refer also to Cargo loading on
page 108.
Alarm system*The conceptThe vehicle alarm system responds:
>When a door, the hood or the lug-
gage compartment lid is opened
>To movement inside the vehicle –
interior motion sensor
>To variations in the vehicle's tilt angle
such as those occurring during
attempts to steal the wheels or tow
the vehicle – tilt alarm sensor
>To interruption of battery voltage.
The system responds to unauthorized
vehicle entry and attempted theft by
simultaneously activating the following:
>The acoustic alarm sounds for
30 seconds
>The hazard warning flashers are acti-
vated for approx. five minutes
>The high beams flash on and off in
rhythm with the hazard warning flash-
ers.To arm and disarm the alarm
systemWhen the vehicle is locked or unlocked
via the driver's door lock or with the
remote control, the alarm system is also
simultaneously armed or disarmed.You can have different acknowl-
edgment signals set to confirm
arming and disarming.<
You can also open the luggage com-
partment lid when the system is armed
by pressing the remote control button,
refer to page 32. The lid is once again
secured when it is closed.
Luggage compartment

39
Indicator lamp displays>The indicator lamp below the interior
rearview mirror flashes continuously:
the system is armed
>The indicator lamp flashes during
arming: the door(s), the hood or lug-
gage compartment lid are not com-
pletely closed. Even if you do not
close the alerted area(s), the remain-
ing areas are secured, and the indi-
cator lamp will flash continuously
after 10 seconds. However, the inte-
rior motion sensor is not activated
>If the indicator lamp goes out when
the system is disarmed: no manipula-
tion or attempted intrusions have
been detected in the period since the
system was armed
>If the indicator lamp flashes for
10 seconds when the system is dis-
armed: an attempted entry has been
detected in the period since the sys-
tem was armed.
Following triggering of an alarm, the
indicator lamp will flash continuously.Avoiding unintentional alarmsThe tilt alarm sensor and interior motion
sensor may be switched off at the same
time. You can do this to prevent a false
alarm from being triggered in garages
with elevator ramps, for instance, or
when the vehicle is transported by train:
Lock the vehicle twice, i.e. arm the sys-
tem. Press button on the remote control
twice in succession or lock the vehicle
twice with the key.
The indicator lamp lights up briefly and
then flashes continuously. The tilt alarm
sensor and interior motion sensor are
deactivated for as long as the system
remains armed.Interior motion sensorIn order for the interior motion sensor to
function properly, the windows and the
sliding/tilt sunroof must be completely
closed.
Nevertheless, you should deactivate
the interior motion sensor, refer to pre-
vious column, if
>persons or animals are left in the
vehicle
>the windows or the sliding/tilt sunroof
are being left open.
The system deactivates the tilt-
alarm sensor and the interior
motion sensor if the convenience clos-
ing of windows is interrupted in the first
10 seconds and then restarted. The
alarm must then be disarmed and reac-
tivated before it will resume opera-
tion.<
Alarm system*
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55
If there is a system malfunction, there is
a risk that the airbags will not be trig-
gered within their normal response
range, even if the level of impact would
normally have triggered them.
Have your BMW center inspect the sys-
tem immediately.
Transporting children safelyCommercially available child-restraint
systems are designed to be secured
with a lap belt or with the lap belt por-
tion of a combination lap/shoulder belt.
Improperly or inadequately installed
restraint systems can increase the risk
of injury to children. Always read and
follow the instructions that come with
the system.Child-restraint system with
tether strapIf you use a child-restraint system with
a tether strap, three additional tether
anchorage points have been provided –
refer to the arrows in the illustration.
Depending on the location selected for
seating in the rear passenger area,
attach the tether strap to the corre-
sponding anchorage point to secure the
child-restraint system, as shown in the
illustration.
If the respective seating position is fit-
ted with a head restraint, lift the head
restraint and pass the tether strap
between the head restraint and the seat
back.
It is recommended to readjust the head
restraint in the lowest possible position.
Adjust the tether strap according to the
child-restraint manufacturer's instruc-
tions.
Airbags
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56
Before installing any child-
restraint device or child seat,
please read the following:
Never install a rear-facing child-
restraint system in the front passenger
seat of this vehicle.
Your vehicle is equipped with an airbag
supplemental restraint system for the
front passenger. Because the backrest
on any rear-facing child-restraint sys-
tem – of the kind designed for infants
under 1 year and 20 lbs/9 kg – would
be within the airbag's deployment
range, you should never mount such a
device in the front passenger seat,
since the impact of the airbag against
the child-restraint's backrest could lead
to serious or fatal injuries.
If it is necessary for a child – not an
infant – to ride in the front seat, certain
precautions should be taken. First,
move the passenger seat as far away
from the dashboard as possible. This
important precaution is intended to
maximize the distance between the air-
bag and the child. Older children
should be tightly secured with a safety
belt after they have outgrown a booster
seat that is appropriate for their age,
height, and weight. Younger children
should be secured in an appropriate
forward-facing child-restraint system
that has first been properly installed
with a safety belt.
Never install a rear-facing child-
restraint system in the front passenger
seat.
We strongly urge you to carefully read
and comply with the instructions for
installation and use provided by the
child-restraint's manufacturer whenever
you use such a device.
Do not attempt to modify child-restraint
systems. If you do this, the protection
provided by these systems could be
impaired.
Always ensure that all occupants – of all
ages – remain properly and securely
restrained at all times.<
All rear seating positions in your vehicle
meet the recommendations of
SAE J1819, an industry-recommended
practice for securing child-restraint sys-
tems in motor vehicles.
Securing child-restraint systemAll of the rear belt retractors and the
front passenger's safety belt can be
locked for mounting and securing child-
restraint systems.
A label with the appropriate instructions
for this is located in the immediate
vicinity of the buckle latch of each
safety belt.To lock the safety beltExtract the entire length of the belt from
the inertia reel mechanism. Allow the
reel to retract the belt somewhat and
engage the buckle, then tighten the belt
against the child-restraint system. The
retraction mechanism is now locked.
Transporting children safely

59
Vehicle Memory, Key MemoryHow the system functionsNo doubt you have reflected at one
time or another on how great it would
be if you could permanently configure
your vehicle's various features and
adjustments to mirror your own individ-
ual preferences. In engineering your
vehicle, BMW has provided for a num-
ber of options for personal adjustment
that can be programmed into your vehi-
cle at your BMW center.
The available configuration data fall into
two categories, according to whether
their primary orientation is the vehicle –
Vehicle Memory – or the individual –
Key Memory. Provided that each per-
son has a separate remote-control key,
you can have your BMW center enter
basic adjustment data for up to four
individuals in the system.
The system then relies on a bilateral
data exchange to identify the individual
user and executes the selected settings
whenever the remote control unit is
used to disengage the door locks.
Color-coded decals have been pro-
vided to help you distinguish individual
keys with different settings.What the system can doYou can learn about the entire array of
features this system offers at your BMW
center.
Examples for Vehicle Memory:
>Various signals as acknowledgment
when locking or unlocking your vehi-
cle, refer to pages 31, 33
>Activating/deactivating the "Follow
me home" function, refer to page 89
>Activating/deactivating daytime driv-
ing lamps, refer to page 89
>Selecting units of measure for dis-
playing time, outside temperature,
distance traveled and fuel consump-
tion in the instrument panel>Indicating via an acoustic tone that
PDC has been activated, refer to
page 77
>Switching on the rear window
defroster automatically, refer to
pages 94, 99
>Having the display – after giving an
ice warning – return to its previous
setting, refer to page 75.
Examples for Key Memory:
>Unlocking the driver's door first, then
the vehicle's remaining locks, refer to
page 31
>Locking the vehicle after pulling
away, refer to page 34
>Automatically repositioning of the
driver's seat for the corresponding
driver when the vehicle is unlocked,
refer to page 49
>Automatic tilting of the passenger-
side mirror, refer to page 50.
You will see this symbol through-
out the Owner's Manual. It is to
remind you at appropriate places of the
settings that are available to you.<
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