BMW 330Ci CONVERTIBLE 2001 E46 Owner's Manual

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IndexDataTechnologyRepairsCar careControlsOverview
Interior rearview mirror with automatic dimming feature
* Rain sensor
*
The interior rearview mirror with auto-
matic dimming feature reduces blinding
from following traffic by adapting the
intensity of the reflected images to
correspond to levels of light registered
by the unit's sensors. The mirror reverts
to its undimmed setting as soon as the
light source disappears. One lamp
sensor is mounted on the front of the
mirror housing. This sensor, which is
directed forward, measures light inten-
sity in the area ahead of the vehicle.
The second sensor is integrated within
the mirror's glass. The electronic
control system compares the light
intensity from front and rear. The differ-
ence provides the basic parameter
used to modulate an electrical current
and induce chemical changes in a
semisolid layer incorporated in the lens.46cus036
The semisolid reacts chemically to this
electrical current, thus providing
dimming of the mirror through an infi-
nitely-variable range (electrochromic
technology).
As a result, it is no longer necessary to
dim the mirror manually, and the driver
can concentrate completely on traffic
conditions.
Depending on the degree of wetness on
the windshield, the rain sensor controls
the operation of the windshield wipers.
Infrared light is carried along the surface
of the windshield in an optical conductor
in such a manner that it is reflected
completely when the windshield is dry.
The quantity of reflected light is
measured. If there is moisture on the
glass, the amount of light reflected is
reduced since the infrared light at the
surface of the windshield can escape.
The quantity of reflected light is thus a
means of gauging the degree of wetness
on the windshield. When the system is
set to the "Intermittent" wiper speed, the
wipers react immediately Ð if water is
splashed onto the windshield by vehicles
traveling ahead of you, for example. As a
result, the rain sensor provides a contri-
bution to driving safety and comfort.
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Tire Pressure Control* Self-diagnostics 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 extended-life electronic chip
that contains a pressure 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.
Located near each wheel and
embedded in the vehicle body is an
antenna that receives signals from the
wheel. A central electronics system
evaluates the quadruple signals and
forwards any changes.
The RDC provides an important contri-
bution to driving safety.46cde078
All
of the important electrical and elec-
tronic systems in the vehicle are tested
regularly and automatically Ð the driver
does not have to perform any extra
operations or adjustments.
The indicator lamps come on brießy
after the ignition has been turned on, for
example.
While you are driving, the functional
status of the actuator motors (for the
windshield wipers, power windows,
seats, etc.) is constantly being analyzed
by electrical measurements in the relays.
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 ßuctuation that 46cde052
would necessarily accompany 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 ßaps of
the heating and ventilation system travel
to the nearest limit position. This action
ensures that the system will be able to
provide defrosting, regardless of other
circumstances, e. g. if a malfunction in the
air conditioner/automatic 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 of all the heating and
ventilation ßaps travel 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 appro-
priate adjustments for the operating
elements can be made at any time.
You will hear the sounds of the air ßaps as
the air conditioner/automatic climate
control* carries out its self-diagnostic
functions after the ignition has been shut
off. All of the other self-diagnostics func-
tions operate silently in the background.
Any possible faults detected during these
self-diagnostics can be read out and
corrected by your BMW center
during the
next regularly scheduled maintenance.

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IndexDataTechnologyRepairsCar careControlsOverview
Rollover protection system
Xenon lamps
*
The rollover protection system offers
additional protection to the airbags and
the safety belts. It uses highly sensitive
sensors that respond immediately to
any unstable vehicle condition encoun-
tered while driving, e. g. a steep angle
or loss of wheel contact with the
ground. The protective bar in the rear
headrests would be triggered in this
type of situation.
The xenon lamp provides forward illu-
mination with significantly more bright-
ness and uniformity than the traditional
halogen lamp.
In a xenon lamp, an electric arc replaces
the filament in order to generate intense
illumination. A gas mixture in a quartz
glass tube with metal vapor is ignited by
a high electric voltage. The arc that is
generated is then sustained by a lower
voltage. When the lamp is turned on,
there is a brief warm-up period.
Maximum brightness is attained in
approx. 15 seconds.
390de134
Xenon lamps provide significantly
improved visibility, especially during
adverse weather conditions and difficult
driving situations (e. g. driving at night in
heavy rain or through road repair areas
where there are no lane markers).
Vehicles with xenon lamps are equipped
with an automatic headlamp range
control. As a result, the lane ahead of
you is always optimally lighted, even
under varying load conditions, and
drivers in oncoming traffic are not
blinded.
Xenon lamps make a significant contri-
bution to highway safety since other
highway users, bicyclists and motor-
cyclists in the right lane, and pedes-
trians are more easily detected.

194n

Overview
Controls and features
Operation, care
and maintenance
Owner service procedures
Technical data
Index Advanced technology
195n
IndexDataTechnologyRepairsCar careControlsOverview
Engine data196
Dimensions197
Weights198
Capacities199
Electrical system200
Drive belts200
Data

196n
BMW 325Ci BMW 330Ci
Displacement
Number of cylinderscu in (cmm) 152.2 (2,494)
6181.8 (2,979)
6
Maximum output
at engine speedhp
rpm184 (135)
6,000225 (165)
5,900
Maximum torque
at engine speedlb-ft (Nm)
rpm175 (237)
3,500214 (290)
3,500
Compression ratioe
10.5 10.2
Stroke
Borein (mm)
in (mm)2.95 (75)
3.31 (84)3.53 (89.6)
3.31 (84)
Fuel-injection system Digital-electronic engine-management system
Engine data

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IndexDataTechnologyRepairsCar careControlsOverview
46cus051
Minimum turning circle dia.: 34.4 feet (10.5 m)
Dimensions

198n
Weights
BMW 325Ci BMW 330Ci
Curb weight (with one person, ready for operation, full tank of fuel, options not included)
with manual transmission
with automatic transmissionlbs. (kg)
lbs. (kg)3,560 (1,615)
3,627 (1,645)3,627 (1,645)
3,704 (1,680)
Approved gross vehicle weight
with manual transmission
with automatic transmissionlbs. (kg)
lbs. (kg)4,442 (2,015)
4,509 (2,045)4,508 (2,045)
4,586 (2,080)
Approved front axle weight lbs. (kg) 2,072 (940) 2,094 (950)
Approved rear axle weight lbs. (kg) 2,546 (1,155) 2,602 (1,180)
Approved roof weight for the hardtop lbs. (kg) 165 (75) 165 (75)
Luggage compartment capacity
with the convertible top compartment raisedcu ft (l)
cu ft (l)9.2 (260)
10.6 (300)9.2 (260)
10.6 (300)
Approved axle loads and approved gross vehicle weight may not be exceeded.

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IndexDataTechnologyRepairsCar careControlsOverview
Capacities
Notes
Fuel tank
Reserve gal. (liters)
gal. (liters)approx. 16.6 (approx. 63)
approx. 2.1 (approx. 8)Fuel specification: page 27
Windshield/headlamp washer system quarts (liters) approx. 5.6 (approx. 5.3) Specifications: page 144
Cooling system including heater circuit quarts (liters) approx. 8.9 (approx. 8.4) Specifications: page 147
Engine oil filter change quarts (liters) approx. 6.9 (approx. 6.5) BMW High Performance
Synthetic Oil
Specifications: page 146
Manual and automatic transmission, transfer box
and differentialÐ Lifetime fluid, no fluid
change required

200n
Electrical system Drive belts Battery 12V, 80 AhSpark plugs NGK BKR 6 EQUP
Bosch FGR 7 DQPWater pump Ð Generator Ð
Power steering
V-belt 6 PK x 1538
A/C compressor
V-belt 5 PK x 863You can obtain Original BMW
Parts and Accessories, as well as
professional advice from your BMW
center.<