2001 BMW 325i TOURING wheel

160n
Changing a wheel>Spare tire
or space-saver tire
Located next to the jack.
Loosen the wing nut (arrow) by hand,
remove the storage tray and take out
the wheel.
463de049
Procedure1 Read and comply with the safety
precautions provided on the
previous page.
2 Secure the vehicle against rolling:
Place the wedge 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 wedge securely in
front of the tire. If the wheel must
be changed on a surface with a more
severe slope, take additional precau-
tions to secure the vehicle against
rolling.
3 If your wheels are equipped with full
wheel covers
*: reach into the ventila-
tion openings and pull the cover off.
460de124
4 Loosen the lug bolts g turn.
5 Position the jack under the jacking
point nearest the wheel you are
changing (refer to the illustration at
the left) so that the base of the jack is
positioned vertically under the jack-
ing point relative to the entire surface,
and that the jack head fits securely
into the square recess for the jacking
point (refer to illustration detail) when
the jack is cranked.
6 Jack the vehicle up until the wheel
you are changing is raised from the
ground.
7 Unscrew the lug bolts and remove
the wheel. 460de190

161n
IndexDataTechnologyRepairsCar careControlsOverview
Changing a wheel8 Remove mud or dirt accumulation
from the mounting surfaces of the
wheel and hub. Clean the lug bolts.
9 Position the new wheel or the
space-saver tire on the hub and
screw at least two lug bolts finger-
tight into opposite bolt holes.
10 Screw in the remaining lug bolts.
Tighten all the bolts snugly.
11 Lower the jack and remove it from
beneath the vehicle.
12 Tighten the lug bolts in a diagonal
pattern.
13 If your wheels are equipped with full
wheel covers
*, place the wheel
cover with the valve opening over
the valve (arrow). Use both hands
to press the cover securely onto
the rim.
460de125
14 Check and correct the tire's inflation
pressure at the earliest possibility.
For vehicles with Tire Pressure
Control (RDC):
After mounting the spare tire or
correcting the inflation pressure,
reactivate the system. Refer to
page 85.
Use only the full wheel cover in-
stalled by the factory. Other wheel
covers may not fit securely. The full
wheel cover may not be installed on the
space-saver tire since this could
damage the cover.<
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 continued safety, have the
tightness of the lug bolts [torque
specification: 76 lb. ft. (100 Nm)]
checked with a calibrated torque
wrench.<
When storing the wheel, take care to
ensure that you do not damage the
retaining pin in the spare tire recess.
If light-alloy wheels other than original
BMW light-alloy wheels have been
mounted, it may be necessary to use
different lug bolts for those wheels.
Replace the defective tire as soon as
possible and have the new wheel/tire
balanced.

162n
Changing a wheel Battery Driving with the space-saver tireDrive cautiously. Do not exceed a speed
of 50 mph (80 km/h).
You can anticipate changes in vehicle
handling such as delayed braking re-
sponse, longer braking distances and
changes in self-steering properties in
marginal stability limits.
The changes in handling characteristics
will be even more pronounced in
conjunction with winter tires.
Only one space-saver tire may be
mounted at one time. Reinstall
wheels and tires of the same size and
specification as soon as possible.
Maintain correct tire pressures. Refer to
page 29.<
Installation locationThe battery is in the right rear of the
luggage compartment. Release side
trim panel and remove. Fold back the
cover panel.
Battery posts, terminals, and
related accessories contain lead
and lead compounds. Wash hands after
handling.<
Charge conditionYou can read the charge condition
of the battery with the "Magic Eye
*"
(= a hydrometer):
>Green: adequate charge.
>Black: not charged adequately.
The battery must be recharged.
Please contact your BMW center
for additional information.
>Yellow: replace the battery.
The service life specified for the
battery can be achieved only if it is
always kept adequately charged. If the
vehicle is primarily used for stop-and-
go traffic, be sure to check the charge
status often.<
463us006

168n
Towing the vehicleTow fittingThe screw-in tow fitting is stored in the
onboard tool kit; be sure that it remains
in the vehicle at all times. This fitting
is designed for installation in the tow
sockets located at the front and rear of
the vehicle. It is intended for towing on
paved road surfaces only. This fitting
should not be used to pull a vehicle out
of deep snow, mud, sand, etc.
Always observe all applicable towing
laws and regulations. Access to tow socketFront:
Using a screwdriver, press out the cover
panel on the top part of the recess.460de063
Rear:
Using a screwdriver, press out the cover
panel on the top part of the recess.
Screw the tow fitting in until it
bottoms firmly. If this is not done,
the threads could be damaged.
Do not tow the vehicle by any compo-
nents of the running gear, or lash them
down in any way. If you do, the compo-
nents could be damaged, leading to
possible accidents.<463de007
Towing with a commercial tow
truck>Do not tow with sling-type equip-
ment.
>Use wheel lift or flat bed equipment.
>Please comply with applicable state
towing laws.
Never allow passengers to ride in
a towed vehicle for any reason.
Never attach tie-down hooks, chains,
straps, or tow hooks to tie rods, control
arms, or any other part of the vehicle
suspension, as severe damage to these
components will occur, leading to
possible accidents.c463us007

Overview
Controls and features
Operation, care
and maintenance
Owner service procedures
Technical data
Index Advanced technology
171n
IndexDataTechnologyRepairsCar careControlsOverview
Advanced technology:
Airbags172
Adaptive Transmission Control
(ATC)173
Automatic Stability Control plus
Traction ASC+T/Dynamic
Stability Control DSC173
Radio reception174
Four-wheel drive175
Safety belt tensioner175
Interior rearview mirror with
automatic dimmer176
Rain sensor177
Tire Pressure Control (RDC)178
Self-diagnostics179
Xenon lamps180
Technol-

173n
IndexDataTechnologyRepairsCar careControlsOverview
On vehicles with an automatic trans-
mission, the Adaptive Transmission
Control (ATC) uses a number of factors
to calculate the gear which provides
maximum efficiency. In this process, it
considers your individual driving style
as well as current driving conditions.
ATC recognizes your personal driving
style from the positions and movements
of the accelerator pedal, deceleration
when braking, and lateral acceleration
through curves. Based on different shift
characteristics Ð from comfort-oriented
to performance-oriented Ð ATC will
select the appropriate gear.463us005
In order to include driving conditions in
its calculations, ATC registers curves
and both uphill and downhill gradients.
For example, if you maintain speed
through a curve, the transmission does
not shift up. On uphill gradients, it shifts
up only when the engine speed
increases in order to make more effi-
cient use of power reserves. On down-
hill gradients, ATC shifts down when
the speed of the vehicle increases and
the driver must apply the brakes.Highly sensitive sensors monitor the
number of revolutions of the wheels,
steering angle, lateral acceleration,
brake pressure and the movement of
the vehicle around its vertical axis.
If differences in the wheel speeds
occur, ASC+T recognizes the danger of
wheelspin and reduces torque. If
necessary, the system also responds
with additional brake applications at the
rear wheels.
In addition, DSC permanently monitors
the vehicle's current operating condition
and compares it with an ideal condition
that is calculated from the sensor's
signals. If deviations from this occur
(understeering or oversteering, for
instance), DSC can stabilize the vehicle
in fractions of a second by reducing
engine output and with the assistance of
braking intervention at individual
wheels. As a result, dangerous skids can
be prevented even as they are just
beginning.
You may need some time to become
accustomed to this system's interven-
tion. However, it provides optimum drive
force and vehicle stability.
The braking intervention may be
accompanied by sounds specific to the
system.
ATC
*
ASC+T/DSC
*

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.
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178n
Tire Pressure Control (RDC)
*
This system regularly checks tire pres-
sure and monitors all four tires even
while driving, so you do not have to.
Behind the valve stem in every wheel,
there is an electronic chip which is
designed for severe-duty applications
and long service life. It contains a pres-
sure sensor, a transmitter and a battery.
The pressure is measured in extremely
short time intervals and then transmitted
by a radio signal. If an irregularity is
detected, the transmission rate is
increased. 463de006
There is an antenna located right near
every wheel in the vehicle body. This
antenna picks up signals from its
respective wheel. A central electronics
system evaluates the quadruple signals
which it receives and forwards any
changes.
The RDC provides an important contri-
bution to driving safety.