brake sensor BMW X3 XDRIVE 30I 2009 E83 Owner's Manual

Reference
At a glance
Controls
Driving tips
Mobility
51
Malfunction
The LED in the button flashes and a short con-
tinuous tone sounds. PDC is malfunctioning.
Switch off PDC. Have the system checked.
To prevent this problem, keep the sensors
clean and free of ice or snow in order to ensure
that they will continue to operate effectively.
When using high-pressure washers, do not
spray sensors for long periods and keep the
sprayer at least 4 in/10 cm away from the sen-
sors.
System limits
Even with PDC, final responsibility for
estimating the distance between the
vehicle and any obstructions always remains
with the driver. Even when sensors are involved,
there is a blind spot in which objects cannot be
detected. The system is also subject to the
physical limits that apply to all forms of ultra-
sonic measurement, such as those encoun-
tered with tow bars and trailer couplings, or thin
and wedge-shaped objects. Low objects
already displayed, e.g. curb edges, can come
into the blind spot of the sensors before or after
a continuous tone sounds. The system may fail
to detect higher obstacles such as projections
from walls.
Loud sources of sound, inside and outside the
vehicle, could drown out the PDC signal tone.<
Driving stability control
systems
Your BMW is equipped with an extended array
of systems designed to enhance and maintain
vehicle stability even under unfavorable driving
conditions.
ABS Antilock Brake System
ABS prevents the wheels from locking during
braking. Safe steering response is maintained
even during full braking. This results in an
increase in the active safety.
ABS is operational every time you start the
engine. Safe braking, refer to page84.
Electronic brake-force distribution
The system controls the brake pressure in the
rear wheels to ensure a stable braking behavior.
Brake assistant
When the brake pedal is depressed quickly, this
system automatically generates a maximum
braking force distribution and thus helps keep
the braking distance to a minimum during full
braking. This system exploits all of the benefits
provided by ABS.
As long as you want full braking to continue, do
not reduce pressure on the brake.
DSC Dynamic Stability Control
DSC prevents slip at the drive wheels when
starting off and accelerating. The system also
detects unstable driving conditions, such as a
fishtailing of the vehicle's rear end or the sliding
of the vehicle on its front wheels. In these cir-
cumstances, DSC helps keep the vehicle on a
safe path, within physical limits, by reducing
engine output and by applying the brakes in
individual wheels.
The laws of physics cannot be repealed,
even with DSC. An appropriate driving
style always remains the responsibility of the
driver. Do not squander the additional margin of
safety by driving dangerously; otherwise, you
run the risk of causing an accident.<
Deactivating DSC
Maintain pressure on the button until the DSC
indicator lamp lights up, but do not press for
longer than approx. 10 seconds. DTC Dynamic
Traction Control and DSC are deactivated

Things to remember when driving
84
General driving notes
Closing liftgate
Operate the vehicle only when the liftgate
is completely closed; otherwise, exhaust
fumes could enter the interior of the vehicle.<
If special circumstances should make it abso-
lutely necessary to operate the vehicle with the
liftgate open:
1.Close all windows and the panorama glass
sunroof.
2.Greatly increase the air supply of the air
conditioning system or automatic climate
control, refer to page64 or67.
Hot exhaust system
High temperatures occur in the exhaust
system of every vehicle. Do not remove
the heat shields installed adjacent to various
sections of the exhaust system, and never apply
undercoating to them. When driving, standing
at idle, and 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 to
a fire, resulting in serious personal injury and
property damage. Do not touch hot exhaust
pipe, it can cause burns.<
When vehicle is parked
Condensation forms in the air conditioner/auto-
matic climate control system during operation,
and then exits under the vehicle. Traces of con-
densed water under the vehicle are therefore
normal.
Before driving into a car wash
Fold in the exterior mirrors, refer to page33;
otherwise, they could be damaged due to the
width of the vehicle.
Deactivate the rain sensor; otherwise, damage
could result from undesired wiper activation,
refer to page42.
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 sur-
face. This phenomenon is referred to as hydro-
planing, and is characterized by a partial or
complete loss of contact between tires and
road surface, ultimately undermining your abil-
ity to steer and brake the vehicle.<
The danger of hydroplaning increases as tire
tread depth decreases, also refer to Minimum
tread depth on page98.
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 trans-
mission may be damaged.<
Using handbrake on inclines
Do not hold the vehicle in place on slopes
by slipping or riding the clutch, use the
handbrake instead. Otherwise, greater clutch
wear will result.<
Safe braking
Your BMW is equipped with ABS as standard
equipment. In situations in which it is required, it
is best to apply the brakes fully. Since the vehi-
cle 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.
Wet roads
On wet roads or in heavy rain, briefly 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 that is generated by the brake applica-
tions helps to dry the brake rotors and pads.
The full braking force will then be available
when you need it.

Care
108
Care
Car-care products
BMW recommends that your vehicle be
cleaned, cared for, and maintained using prod-
ucts that have been approved by BMW for this
purpose.
Regular cleaning and care makes a significant
contribution to maintaining the value of your
BMW.
Your BMW Sports Activity Vehicle Center will
be happy to advise you on products and ser-
vices for the cleaning, care, and maintenance of
your BMW.
Genuine BMW Care Products are materi-
als tested, lab tested, and field tested and
offer optimum care, maintenance, and protec-
tion for your vehicle.<
Do not use cleansers that contain alcohol
or solvents; they can damage your vehi-
cle.<
Cleaning agents can contain substances
that are dangerous or pose health risks.
For this reason, always read and comply with
the warnings and danger notices on the pack-
aging. Open the doors or windows on your vehi-
cle whenever cleaning the interior. Make sure
that there is sufficient ventilation when working
in enclosed spaces. Use only products that are
provided for cleaning vehicles.<
Exterior care
Washing your vehicle
In the winter months, it is especially
important to ensure that the vehicle is
washed on a regular basis. Heavy soiling and
road salts can result in damage to the vehicle.<
After washing the vehicle, apply the
brakes briefly to dry them. Failure to do so
may lead to a reduction in braking efficiency and
also to corrosion of the brake rotors.<
Car washes
Give preference to cloth car washes.
Before driving into the car wash, check whether
the system is suitable for your BMW. To do so,
pay attention to the following points:
>Dimensions of your vehicle, refer to
page129
>If necessary: fold in the exterior mirrors,
refer to page33.
>Maximum permissible tire width.
Preparations for driving into the car wash:
>Deactivate rain sensor
* to prevent undes-
ired wiper operation.
>Deactivate rear window wiper and protect
from damage. Ask the operator of the car
wash about suitable protection measures
should the need arise.
>Remove additional add-on components,
e.g. spoilers or telephone antennas; other-
wise, they could be damaged.
Steam cleaners/high pressure cleaning
jets
When using steam cleaners or high pres-
sure cleaning jets, be sure to maintain a
sufficient distance and do not exceed a maxi-
mum temperature of 1407/606.
Insufficient distance or excessive pressure or
temperature can damage parts of the vehicle or
water can penetrate to the interior of the vehi-
cle. Follow the operating instructions for the
high pressure cleaning jet.<
Do not aim high pressure cleaning jets at
sensors such as those of the Park Dis-
tance Control for long periods of time and main-
tain a distance of at least 12 in/30 cm.<

Reference
At a glance
Controls
Driving tips
Mobility
109
Hand washes
When washing the vehicle by hand, use ample
water and optionally Auto Shampoo. Clean the
vehicle with gentle pressure, using a sponge or
a washing brush.
Before cleaning the windshield, deacti-
vate the rain sensor or switch off the igni-
tion in order to prevent undesired wiper activa-
tion.<
Obey local regulations for washing vehi-
cles by hand.<
Headlamps
Do not rub dry and never use abrasives or
strong solvents to clean the covers.
Use shampoo or insect remover to soften
insects and then rinse with ample water.
Remove accumulated ice and snow with win-
dow deicer, not a scraper.
Windows
Use glass cleaner to clean outer and inner sur-
faces of windows and mirror glass.
Do not clean mirror glass with cleansers
that contain powdered quartz.<
Wiper blades
Clean with soapy water and replace regularly to
prevent streaking.
Wax residues and dirt on the windshield
cause streaking during wiper operation
and lead to premature wear on wiper blades and
can cause the rain sensor to malfunction.<
Caring for vehicle finish
Regular care and maintenance helps your vehi-
cle retain its value and protects its finish against
the long-term effects of finish-damaging sub-
stances.
Environmental factors that occur locally or
regionally can have a negative impact on the fin-
ish of your vehicle and may damage it. It is
therefore important to adjust the frequency and
extent of vehicle care accordingly.Immediately remove particularly corrosive sub-
stances such as spilled fuel, oil, grease, brake
fluid, tree sap, or bird droppings; otherwise,
they can damage the finish.
Repairing damages to finish
Depending on the severity of the damage,
have stone damage or scratches touched
up immediately in order to prevent rust from
forming.<
BMW recommends having paint damage pro-
fessionally repaired in accordance with factory
guidelines using Genuine BMW finish materials.
Waxing
It is time to wax the vehicle when water no
longer beads on the clean surface of the paint.
Use only products that contain carnauba wax or
synthetic waxes to protect the finish.
Rubber seals
Only treat with water or rubber cleaner.
To avoid noise or damage, do not use
care products that contain silicone when
caring for rubber seals.<
Chrome parts
Carefully clean parts such as the radiator grille,
door handles, or window frames with ample
water and added shampoo, particularly when
they have been exposed to road salts. Use
chrome polish for additional treatment.
Light-alloy wheels
By design, the system produces dust during
braking, which settles on the light-alloy wheels.
Remove it frequently with an acid-free wheel
cleaner.
Do not use corrosive, acid-containing,
strongly alkaline, or coarse cleansers or
steam cleaners hotter than 1407/606; oth-
erwise, you can damage your vehicle.<
Aluminum running boards
Superficial rust on the aluminum running
boards can be removed with a special cleanser.

Reference
At a glance
Controls
Driving tips
Mobility
133
Blower, refer to
– Air volume64
– Air volume, adjusting
manually67
BMW homepage4
BMW maintenance
system106
Bottle holder, refer to Cup
holders72
Brake assistant51
– warning lamp53
Brake fluid105
– level105
– warning lamp105
Brake force display56
Brake lamps115
– brake force display56
– indicator lamp, defective
bulb12,59
– replacing bulbs115
Brake pads85
– breaking-in82
– warning lamp85
Brake pedal, refer to Safe
braking84
Brake rotors
– brake system82
– breaking-in82
Brakes84,105
– ABS51,84
– brake fluid105
– brake pads85
– breaking-in82
– handbrake39
– indicator/warning lamp12
Brake system105
– brake fluid105
– brake pads85
– breaking-in82
– disk brakes85
– warning lamp105
Brake wear warning
– refer to Brake pads85
– warning lamp105
Breakdown service, refer to
Receiving assistance121
Breaking-in82Bulb replacement, refer to
Lamps and bulbs112
Buttons on steering wheel13
C
California law
– Event Data Recorders107
– Proposition 65 Warning5
Calling, refer to telephone
operation instructions
Can holder, refer to Cup
holders72
Capacities131
Capacity, cargo area130
Care
– exterior108
– interior110
Care and maintenance
– car-care products108
– carpets110
– car washes108
– CD/DVD players110
– chrome sections109
– displays110
– fine wood components110
– finish109
– hand washes109
– headlamps109
– high pressure cleaning
jets108
– leather110
– light-alloy wheels109
– plastic components110
– rubber seals109
– running boards109
– safety belts110
– sensors110
– upholstery materials/cloth
coverings110
– windows109
– wiper blades109
Cargo, securing86Cargo area22,76
– capacity130
– cover77
– emergency release, refer to
Opening manually22
– enlarging76
– floor cover78
– foldable rear backrest76
– hatch, refer to Liftgate22
– lashing eyes78
– opening from outside22
– opening with remote
control20
– power socket74
Cargo loading85
– load86
– securing cargo86
– stowing cargo
86
– vehicle85
Caring for the vehicle
finish109
Caring for your vehicle108
Car keys, refer to Key set18
Car phone, refer to separate
Owner's Manual
Car phone preparation75
Car radio, refer to Owner's
Manual for Radio/Onboard
Computer
Car washes84,108
Cassette operation, refer to
Owner's Manual for Radio/
Onboard Computer
CD operation, refer to Owner's
Manual for Radio/Onboard
Computer
Central locking system19
– interior21
Changes, technical, refer to
For your own safety5
Changing a wheel116
Changing gears
– automatic transmission with
Steptronic41
– manual transmission40
Changing wheels98
Charge-current indicator
lamp12,119

Reference
At a glance
Controls
Driving tips
Mobility
139
R
Radiator, refer to Coolant105
Radio, refer to Owner's
Manual for Radio/Onboard
Computer
Radio-control key, refer to
Master key with remote
control18
Radio navigation, refer to
separate Owner's Manual
Rain sensor42
Range, setting units48
Reading lamps
– front61
– rear62
Rear armrest, refer to Armrest,
rear73
Rear backrests, folding76
Rear lamps
– refer to Tail lamps115
– replacing bulbs115
Rear lamps and reflector, refer
to Tail lamps115
Rear seat back, folding76
Rearview mirrors, exterior33
Rear window defroster
– air conditioner64
– automatic climate control68
Rear window safety switch23
Rear window wiper43
– wiper blade
replacement112
Recirculated-air mode
– air conditioner64
– automatic climate control68
Refueling92
Remaining distance, refer to
Cruising range49
Remaining distance until
service47
Remote control19
– garage-door opener69
– liftgate20
– malfunction20
Removing condensation,
windows
– air conditioner64
– automatic climate control67Replacement fuses120
Replacing bulbs, refer to
Lamps and bulbs112
Replacing tires
– new wheels and tires98
– wheel changes116
Replacing windshield
wipers112
Reporting an accident, refer to
Initiating an emergency
request121
Reporting safety defects7
Required oil grades, refer to
Approved engine oils104
Reserve indicator lamp, refer
to Fuel gauge46
Restraint systems
– for children35
– refer to Safety belts32
Reverse gear
– automatic transmission with
Steptronic41
– manual transmission40
Roadside Assistance, refer to
Receiving assistance121
Roadside parking lamps60
Roller cover for cargo area,
refer to Cargo area cover77
Roll-up cover, refer to Cargo
area cover77
Roof load capacity, refer to
Weights130
Roof-mounted luggage
rack87
Rope, refer to Tow starting
and towing123
Rotating coin holder, refer to
Storage compartments73
Run-flat indicator, refer to Flat
Tire Monitor54
S
Safety belts32
– safe sitting position27
– warning lamp32
Safety belt tensioners, refer to
Safety belts32
Safety defects7Safety feature, window23
Safety systems, refer to
– ABS Antilock Brake
System51
– Airbags57
– DSC Dynamic Stability
Control51
– xDrive52
Screw thread for tow
fitting123
Seat heating31
Seat memory, refer to Seat
and mirror memory31
Seats
– adjusting electrically28
– adjusting sports seat29
– heating31
– memory, refer to Seat and
mirror memory31
– sitting safely27
– storing the setting31
Securing, vehicle, with the
remote control19
Securing cargo, refer to Cargo
loading85
Selector lever
– automatic transmission40
– automatic transmission with
Steptronic40
Selector lever interlock, refer
to Shiftlock40
Selector-lever positions,
automatic transmission40
Service, refer to Receiving
assistance121
Service and warranty6
Service Engine Soon38,107
Service Interval
Display47,106
Setting interior
temperature64,67
Shifting gears in automatic
transmission with
Steptronic41
Shiftlock40
Side airbags57
Side tilt, permissible87
Side turn signals, bulb
replacement115