2004 BMW X3 2.5I SAV brake

Reference
At a glance
Controls
Driving tips
Mobility
51
Indicator lamp
The indicator lamp in the instrument
cluster goes out soon after you start
the engine.
If the indicator lamp flashes:
DSC is active and is regulating the drive
and braking forces.
The indicator lamp stays lit:
DSC has been switched off using the but-
ton and the stabilizing interventions are no
longer available.
Switching off DSC
Press the button; the indicator lamp comes
on and stays on.
Stabilizing interventions of the chassis con-
trol system DSC are no longer available.
However, the braking interventions that
simulate the function of the differential lock
continue to be active.
In the following exceptional circumstances,
it may be effective to switch off the DSC for
a short period:
>When rocking the vehicle and starting
off in deep snow or on loose road sur-
faces
>On sandy road surfaces
>On poor surfaces with deep ruts
>If the wheels churn on muddy surfaces
>When driving with snow chains.
As a result of the braking interven-
tions, the brakes may be subjected to
additional loads when the system is
switched off. In order to limit the brake tem-
perature, brief automatic masking of the
brake activation is possible.
To maintain vehicle stability, always drive with the system switched on when possi-
ble.<
Switching DSC on
Press the DSC button again; the indicator
lamp in the instrument cluster goes out.
DSC is now activated.
xDrive
xDrive is the all-wheel drive system of your
BMW X3. The combined effects of xDrive
and DSC further optimize the traction and
dynamic driving characteristics. The all-
wheel drive system xDrive variably distrib-
utes the drive torque to the front and rear
axle depending on the driving situation and
prevailing road conditions.
Hill Descent Control HDC
The concept
HDC is a system for hill descent assistance
that reduces the speed on steep downward
inclines and makes it even easier to control
the driving characteristics of your BMW
under these conditions.
The vehicle moves at slightly more than
walking speed without active intervention
from the driver.
HDC is available for activation at vehicle
speeds below approx. 20 mph/35 km/h.
When driving down steep hills with a speed
below approx. 20 mph/35 km/h, the vehi-
cle reduces speed automatically down to
slightly more than walking speed, approx.
5 mph/8 km/h, and then maintains this
speed at a constant.
You can use the accelerator or brakes to
vary this automatically controlled speed
within a range extending from approx.
3 mph/5 km/h to 15 mph/25 km/h.
You can specify a target speed within the
same range by using the +/Ð buttons of the
cruise control in the steering wheel.
HDC is automatically deactivated once
vehicle speed again exceeds approx.
35 mph/60 km/h.

Technology for comfort, convenience and safety
52
Activating the system
Press the button; the indicator lamp comes
on.
The indicator lamp flashes when the brakes
are applied automatically.
Deactivating the system
Press the button again; the indicator lamp
goes out.
Above approx. 35 mph/60 km/h HDC is
immediately deactivated, and when the
ignition is switched off after approx.
10 seconds.
Using HDC
On manual transmission vehicles:
Use HDC in first gear and in reverse gear,
as in the higher gears the engine braking
effect diminishes.
On automatic transmission vehicles:
You can use HDC in every drive position.
Malfunction
If the indicator lamp in the button goes out
in the HDC mode or fails to light up when
the button is pressed:
HDC is temporarily not available, as the
brake temperature is too high.
Malfunctions of the driving stability
control systems
The red brake warning lamp lights
up together with the warning lamps
for ABS and DSC/xDrive. In addi-
tion, a warning signal sounds:
ABS, DSC and xDrive have failed.
Drive may then only be carried out
via the rear axle. Please have it checked by the nearest BMW Sports Activ-
ity Vehicle Center.
Proceed cautiously and defensively.
When driving on poor roads, refrain
from using full throttle and avoid pressing
the accelerator beyond the kickdown point.
Otherwise the drive train may be damaged
or accidents can occur.<
If the brake warning lamp lights up yellow in
the described combination, the Electronic
brake-force distribution EBV is still avail-
able.
Indicator and warning lamps for
Canadian models.
The warning lamp in the instrument
cluster lights up in yellow.
Dynamic Brake Control DBC is
defective. Have the system checked and
repaired at your BMW Sports Activity Vehi-
cle Center as soon as possible.
Warning lamp for Canadian models.
The warning lamp lights up continu-
ously and a warning signal sounds:
DSC or the xDrive all-wheel system
has failed.
The stabilizing interventions of DSC or the
all-wheel drive system xDrive are no longer
available. Drive may then only be carried
out via the rear axle. Please have it
checked by the nearest BMW Sports Activ-
ity Vehicle Center.
Proceed cautiously and defensively.
When driving on poor roads, refrain
from using full throttle and avoid pressing
the accelerator beyond the kickdown point.
Otherwise the drive train may be damaged
or accidents can occur.<
The warning lamp lights up:
Malfunction in the driving stability
control systems. HDC is no longer

Technology for comfort, convenience and safety
54
Brake force display
The brake force display indicates the inten-
sity with which you are applying your
brakes to drivers of following vehicles.
The display consists of two stages:
>Normal braking:
Brake lamp 1 lights up on both sides of
the vehicle together with the center
brake lamp
>Heavy braking and braking with ABS:
Brake lamps 1 and 2 light up on both
vehicle sides together with the center
brake lamp.
Airbags
The following airbags are located beneath
the marked covers:
1Front airbags for driver and front pas-
senger
2Head airbags in front and rear
3Side airbags in front and rear
*
Protective effect
The front airbags help protect the driver
and front passenger by responding to fron-
tal impacts in which safety belts alone can-not provide adequate restraint. When
needed, the head and side airbags help
provide protection in the event of side
impact. The relevant side airbag supports
the side upper body area. The relevant
head airbag supports the head and pro-
vides protection against objects entering
the vehicle.
The airbags are deliberately not triggered
in every impact situation, e.g. less severe
accidents, certain roll-over situations or
rear-end collisions.
The rear seat side airbags may
already have been deactivated by a
BMW Sports Activity Vehicle Center.
Labels in the rear door opening should indi-
cate the status of your rear seat side air-
bags. If you are uncertain of their status, or
wish to have the airbags activated or deac-
tivated, please contact your BMW Sports
Activity Vehicle Center.<
For information on the correct sitting posi-
tion, refer to page 27.
Do not apply adhesive materials to
the cover panels of the airbags, cover
them or modify them in any other way.
Do not attempt to remove the airbag reten-
tion system from the vehicle. Never modify
or tamper with either the wiring or the indi-
vidual components in the airbag system.
This category includes the upholstery in the
center of the steering wheel, on the instru-
ment cluster, the side trim panels on the
doors, and the roof pillars along with the
sides of the headliner. Do not attempt to
remove or dismantle the steering wheel.
Do not touch the individual components
directly after the system has been trig-
gered, because there is a danger of burns.
If you note any indication of system mal-
function, if you desire to have an airbag
deactivated, or if the airbag retention sys-
tem is triggered in response to an accident,
you should always entrust all inspection,
repair and dismantling operations to your
BMW Sports Activity Vehicle Center.
Unprofessional attempts to service the sys-
tem could lead to failure in an emergency
or undesired airbag activation, either of
which could result in personal injury.

Things to remember when driving
76
Things to remember when driving
Break-in procedures
To ensure that your vehicle provides maxi-
mum economy throughout a long service
life, we request that you observe the fol-
lowing instructions:
Engine and differential
Up to 1,200 miles/2,000 km:
During this initial period you should attempt
to avoid constant, steady-state operation
and vary both vehicle and engine speeds
as often as possible. Until the break-in
period has been completed you should
also refrain from exceeding the following:
>4,500 rpm or 100 mph/160 km/h.
Always obey all official speed limits.
Refrain from using full throttle and avoid
pressing the accelerator beyond the kick-
down point.
Once you have driven 1,200 miles/
2,000 km, the engine and vehicle speeds
can be gradually increased.
You should also comply with these break-in
procedures should the engine or one of the
differentials be replaced later in the course
of the vehicle's service life.
Tires
Due to technical factors associated with
their manufacture, tires do not achieve their
full traction potential until after an initial
break-in period. For this reason, drive with
extra care during the initial 200 miles/
300 km.
Obey your local and state maximum speed
limits.
When the vehicle is operated on wet
or slushy roads, a wedge of water
may form between the tire and the road
surface. This phenomenon is referred to as
hydroplaning and can lead to partial or
complete loss of traction, vehicle control
and braking effectiveness. Reduce your
speed on wet roads.<
Brake system
Approx. 300 miles/500 km must elapse
before the brake pads and rotors achieve
the optimal pad-surface and wear patterns
required for trouble-free operation and
long service life later on.
To break in the separate handbrake drums,
apply the handbrake lightly when coasting
to a standstill Ð at a traffic signal, for
instance; use caution to avoid posing a
danger to other road users.
To avoid corrosion, repeat this procedure
from time to time.
The brake lamps do not come on when the
handbrake is set.
Vacuum for the brake system servo
unit on your BMW is available only
when the engine is running. When you
move the vehicle with the engine off Ð e.g.
by towing Ð substantially higher levels of
pedal force will be required to brake the
vehicle.<
Clutch
The function of the clutch is also only at its
optimized level after a distance driven of
approx. 300 miles/500 km. During this
break-in period, engage the clutch gently.
General driving notes
High temperatures
Extreme temperatures occur at the
catalytic converter on this and every
catalyst-equipped vehicle. Do not remove
the heat shields installed adjacent to vari-
ous sections of the exhaust system, and
never apply undercoating to them. When
driving, standing at idle and while parking
take care to avoid possible contact
between the hot exhaust system and any
highly flammable materials such as hay,
leaves, grass, etc. Such contact could lead

Reference
At a glance
Controls
Driving tips
Mobility
77
to a fire, and with it the risk of serious prop-
erty damage as well as personal injury.<
Parking the vehicle
Condensation forms in the air conditioner
system during operation, and then exits
under the vehicle. Traces of condensed
water under the vehicle are thus normal.
Before driving into the car wash
Fold in the exterior mirrors, refer to
page 31, as otherwise they could be dam-
aged due to the width of the vehicle.
Deactivate the rain sensor as otherwise
damage could result from undesired wiper
activation, refer to page 42.
Hydroplaning
When driving on wet or slushy roads,
reduce road speed. If you do not, a
wedge of water can form between tires and
road surface. This phenomenon is referred
to as hydroplaning, and is characterized by
a partial or complete loss of contact
between tires and road surface, ultimately
undermining your ability to steer and brake
the vehicle.<
Driving through water
Do not drive through water on the
road if it is deeper than 20 in/50 cm,
and then only at walking speed. Otherwise,
the vehicle's engine, the electrical systems
and the transmission may be damaged.<
Safe braking
Emergency stops
The best way to brake is to apply maximum
pressure to the brake pedal during emer-
gency Ð panic stops. Since the vehicle
maintains steering responsiveness, you
can nevertheless avoid possible obstacles
with a minimum of steering effort.
Pulsation at the brake pedal combined with
sounds from the hydraulic circuits indicates
to the driver that ABS is in its active mode. Do not drive with your foot resting on
the brake pedal. Otherwise, even light
but consistent pedal pressure can lead to
high temperatures, brake wear and possi-
bly even brake failure.<
Wet conditions
While driving in wet conditions and in
heavy rain, it is a good idea to apply light
pressure to the brake pedal every few
miles. Watch traffic conditions to ensure
that this maneuver does not endanger
other road users. The heat which is gener-
ated by the brake applications helps to dry
the brake pads and rotors. The required
braking force will then be available when
you need it.
On a grade
You can retain full and unimpaired braking
efficiency by downshifting to a gear in
which only minimal brake applications are
needed when descending long or steep
downhill stretches.
You can further enhance the engine's brak-
ing effect by selecting a lower gear in the
automatic transmission's manual mode,
downshifting as far as first gear on
extremely steep stretches, refer to
page 38. This strategy helps you avoid
placing excessive loads on the brake sys-
tem.
During slower downhill driving, use the Hill
Descent Control HDC, refer to page 51.
Never drive with the clutch pressed,
with the transmission in Neutral or
with the engine switched off, as otherwise
there is no engine braking when the trans-
mission is in Neutral, and no power-assist
for brakes and steering.
Never allow floor mats, carpets or any other
objects to protrude into the area around the
accelerator and brake pedals and obstruct
their movement.<
Corrosion
When the vehicle is driven only occasion-
ally, during extended periods when the
vehicle is not used at all, and in operating
conditions where brake applications are

Things to remember when driving
78 less frequent, there is an increased ten-
dency for corrosion to form on rotors, while
contaminants accumulate on the brake
pads. This occurs because the minimal
pressure which must be exerted by the
pads during brake applications to clean the
rotors is not reached.
Should corrosion form on the brake rotors,
the brakes will tend to respond with a pul-
sating effect that even extended applica-
tion will fail to cure.
Cargo loading
To avoid loading the tires beyond
their approved carrying capacity,
never overload the vehicle. Overloading
can lead to overheating and increases the
rate at which damage develops inside the
tires. The ultimate result can assume the
form of a sudden air loss.<
Determining the load limit
1.Locate the following statement on the
driver's door pillar:
The combined weight of occu-
pants and cargo should never
exceed XXX lbs or YYY kg. Failure to
observe this can compromise your
vehicle's driving stability and cause
vehicle damage.<
2.Determine the combined weight of the
driver and passengers that will be riding
in your vehicle
3.Subtract the combined weight of the
driver and passengers from XXX
pounds or YYY kilograms4.The resulting figure equals the available
amount of cargo and luggage load
capacity.
For example, if the XXX amount equals
1,400 lbs and there will be five 150-lbs
passengers in your vehicle, the amount
of available cargo and luggage load
capacity is 650 lbs:
1,400 lbs minus 750 lbs = 650 lbs
5.Determine the combined weight of lug-
gage and cargo being loaded on the
vehicle. That weight should never
exceed the available cargo and luggage
load capacity calculated in Step 4
6.If your vehicle will be towing a trailer,
part of the load from your trailer will be
transferred to your vehicle. Consult the
manual for transporting a trailer to
determine how this may reduce the
available cargo and luggage load
capacity of your vehicle.
Load
The permitted load is the total of the weight
of occupants and cargo/luggage. The
greater the weight of occupants, the less
cargo/luggage can be transported.

Things to remember when driving
80
Driving on bad roads
Your BMW X3 is at home on all paved and
unpaved roads. It combines all-wheel drive
with the advantages of a normal passenger
car.
Driving on unpaved terrain can cause
damage to the vehicle.<
When you are driving on bad roads, there
are a few points which you should strictly
observe Ñ for your own safety, for that of
your passengers, and for the safety of the
vehicle:
>Familiarize yourself with the vehicle
before you begin driving. Do not take
risks with the vehicle under any circum-
stances
>Always adapt the driving speed to the
road conditions. The more steep and
uneven the roadway is, the lower the
speed should be
>You can operate your vehicle on uphill
and downhill gradients with a maximum
slope of 50 %. If you wish to drive on
uphill and downhill grades of this
nature, make sure beforehand that the
engine oil and coolant levels are near
the max mark, refer to pages 94 and 96
>For very steep downhill driving, use Hill
Descent Control HDC, refer to page 51.
Driving off is possible on upward
inclines of up to 33%.
The permitted side inclination is 50 %
>While driving, watch carefully for obsta-
cles such as rocks or holes. Try to avoid
these obstacles whenever possible
>Avoid that the body makes contact with
the ground, e.g. on the crests of hills
and bumpy roads
>Do not drive in water that is deeper than
20 in/50 cm. If you must drive through
water up to that depth, drive at a walk-
ing speed and do not stop.
After leaving the water, press on the
footbrake gently several times while
driving at a low speed. The brake appli-
cations will help to dry the brakes, thus
preventing a reduction in braking per-
formance caused by the moisture. For cleaning the handbrake, apply the
lever slightly at approx. 25 mph/40 km/
h and continue to drive for approx. 200
yards/200 meters, provided that traffic
conditions allow you to do so.
Please bear the following points in mind
after driving on poor roads, in order to pre-
serve the road safety of your BMW:
>Clean the heavy dirt from the body
>Clean mud, snow, ice and other materi-
als from the wheels and tires. Check the
tires for damage.

Reference
At a glance
Controls
Driving tips
Mobility
93
Engine compartment
1Reservoir for windshield and headlamp
washer system94
2Body ground Ð negative terminal108
3Auxiliary terminal for jump-starting108
4Engine oil filler neck95 5Brake fluid reservoir96
6Dipstick for engine oil94
7Coolant expansion tank96