2001 BMW 330i TOURING seats

175n
IndexDataTechnologyRepairsCar careControlsOverview
Four-wheel drive Safety belt tensionerThe transmission of power to the four
drive wheels is provided permanently
through a transfer box. The distribution
of torque between the front and rear
axles is 38% to 62%.
Traditional differential locks at the front
and rear axles and in the transfer box
are not required. Their function is
assumed by automatic braking inter-
vention at all four wheels. These trac-
tion interventions are governed by
Automatic Differential Brake (ADB-X), a
sub-function of DSC.
If a wheel tends to slip, it is braked
automatically by ADB-X until it once
again gains traction, and drive force
can be transmitted to that wheel. In
addition, the drive force is distributed to
the remaining wheels during this 530us133
system intervention. Engine output is
also reduced if necessary.
When the DSC is deactivated, the
ADB-X traction intervention is set for
the maximum drive force. However, the
engine intervention and the stability
controls are no longer available. For
this reason, DSC should only be deacti-
vated in the exceptional circumstances
described on page 81.
The BMW 325xi is not an off-road
vehicle. Instead, permanent four-wheel
drive provides a high degree of vehicle
stability and tractive ability under all
road conditions, and will aid you in crit-
ical driving situations, e. g. driving in
extreme winter conditions or on loose
road surfaces.The safety belt tensioner responds to
severe frontal collisions by tightening
the belts to ensure that occupants
remain firmly positioned in their seats.
A gas-pressure system retracts the
buckle assembly to tension the
shoulder and lap belts within fractions
of a second. This reduces the tendency
to slide under the lap belt.
390de330

179n
IndexDataTechnologyRepairsCar careControlsOverview
Self-diagnostics All of the important electrical and elec-
tronic systems in the vehicle are tested
regularly and automatically; the driver
does not have to perform any extra
operations or adjustments.
The indicator lamps also come on
briefly after the ignition has been turned
on.
While you are driving, the functional
status of the actuator motors (for the
windshield wipers, power windows,
seats, sliding/tilt sunroof, etc.) is
constantly analyzed by current
measurements in their relays.460de177
In the same manner, the electrical
resistance of the airbag ignition genera-
tors and all of the remaining airbag
components is measured at all times.
Any fault in this system would be
detected immediately by a current fluc-
tuation that would necessarily accom-
pany it. The fault would be indicated
immediately by the airbag warning
lamp.
Even after you shut off the engine, the
overall functional status of your vehicle
is monitored. For example, all of the
flaps of the heating and ventilation
system travel to the nearest limit posi-
tion. This action ensures that the
system will be able to provide
defrosting, regardless of other circum-
stances, e. g. if a malfunction in the air
conditioner/climate control system
should occur during the night while the
vehicle is parked.
A calibration cycle runs every tenth time
the engine is shut off. During this cycle,
the actuator motors move all air condi-
tioner/automatic climate control flaps to
their limit stops in both directions. The
limit positions and the return travel
paths are checked in this manner in
order to ensure that appropriate adjust-
ments for the operating elements can
be made at any time.You will hear the sounds of the air flaps
as the air conditioning system/auto-
matic climate control carry out their
self-diagnostic functions after the igni-
tion has been turned off. All of the other
self-diagnostics functions operate
silently in the background.
Any possible defects detected during
these self-diagnostics can be read out
by your BMW center and quickly
corrected during the vehicle's next
regularly scheduled maintenance.

Everything from A to ZFolding rear backrest108
Footbrake118
Footwell lamps88
bulb replacement158
Four-wheel drive175
Front fog lamps, bulb
replacement155
Front seat adjustment46
Frost protection,
radiator137
Fuel28
consumption77
consumption display74
gauge74
preparation184
quality28
Fuel filler door
releasing following an
electrical malfunction166
Fuel reserve indicator
lamp74
Fuel tank capacity187
Fuel tank gauge74
Functional status179
Fuses164 G
Gasoline28
Gasoline gauge74
Gasoline quality28
Glove compartment101 Glove compartment lamp,
bulb replacement158
Gross vehicle weight186
H
Handbrake63
Hands-free system103
Hazard warning flashers26
Hazard warning triangle26
Head restraint47
Headlamp covers,
care141,153
Headlamp flasher88
Headlamp washer
system70,134,187
Heated seats100
Heating, rapid94
Heavy loads110
Height185
HiFi system101
High beams23,68,88
bulb replacement153
High Performance Synthetic
Oils136
High-mount brake lamp157
Hood release130
Horn17
Hubcap160
Hydraulic Brake assistant,
refer to DBC118
I
Ice warning76
Icy roads76,121
Identification, tires127
Ignition key32,35
Ignition lock61
Imprint4
Indicator lamps20
Inflation pressure28,124
monitoring85,178
INSPECTION74
Installation child restraint
systems60
Instrument cluster18
Instrument lighting87
Interaxle tire rotation126
Interface socket for Onboard
Diagnostics149
Interference, cellular
phone123
Interior lamps36,88
bulb replacement158
remote control36
Interior motion sensor41
Interior rearview mirror51
automatic dimming
feature52,176
Interlock61
Intermittent wipe68
J
Jack159
Jump-starting167 K
Key32,35
Key Memory52 L
Lamps and bulbs153
Lashing eyes110
LATCH attachment of the
child seat58
Leather care145
Length185
License plate lamp
bulb replacement157
Light switch87
Light-alloy wheels129
Lighter104
Load-securing devices110
Louvers90,96
Low beam headlamps87
bulb replacement153
Lug bolts160
Lug wrench159