2002 BMW 320i SEDAN ECU

112n
To releasePull the lever located under the left-
hand side of the instrument panel.
Do not attempt to service your
vehicle if you do not have the
required technical background. Failure
to work in an informed, professional
manner when servicing components
and materials constitutes a safety
hazard for vehicle occupants and other
road users. If you are not familiar with
the guidelines, please have the opera-
tions performed by your BMW center.<
To openPull the release handle and open the
hood.
To closeAllow the hood to fall from a height of
about 12 in (30 cm) so that it audibly
engages.
To avoid injuries, be sure that the
travel path of the hood is clear
when it is closed, following the same
safety precautions used in all closing
procedures.
If you notice that the hood is not
completely closed while driving, stop
immediately and close it securely.<
Hood

130n
Changing a wheel>Spare tire
or space-saver spare tire
Located next to the jack.
Loosen the wing nut (arrow) by hand,
remove the storage shelf and take the
wheel out
>Lug wrench Ð in the onboard tool kit
on the underside of the luggage
compartment lid, refer to page 124.
Procedure1. Read and comply with the safety
precautions provided on the previous
page
2. Secure the vehicle to prevent it from
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 from
rolling
3. Wheels with full wheel covers
*:
Reach into the ventilation openings
and pull the cover off4. Loosen the lug bolts by rotating half
a turn
5. Position the jack at the jacking point
closest to the flat tire (arrows) with
the jack base vertically below the
jacking point and the entire surface
of the head of the jack will move into
the righthand corner of the square
recess of the jacking point (refer to
the detail in the next illustration)
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

131n
OverviewControlsMaintenanceRepairsDataIndex
Changing a wheel8. Remove accumulations of mud or
dirt from the mounting surfaces of
the wheel and hub. Clean the lug
bolts
9. Position the new wheel or the
space saver spare tire on the hub
and screw at least two lug bolts
finger-tight into opposite bolt holes
10. Screw in the remaining lug bolts
and screw in all the bolts in a diag-
onal pattern
11. Lower the jack and remove it from
beneath the vehicle
12. Tighten the lug bolts securely in a
diagonal pattern
13. Wheels with full wheel covers
*:
Place the wheel cover with the
valve opening (arrow) over the
valve. Use both hands to press the
cover securely onto the rim
14. Check and correct the tire inflation
pressure at the earliest opportunity.
Vehicles with Tire Pressure Monitor
(RDC)/Flat Tire Monitor:
After mounting the spare tire or
correcting the tire inflation pres-
sure, reactivate the system, refer to
pages 78, 81.
Protect valve stems and valves from dirt
using screw-on valve stem caps. Dirty
valve stems frequently lead to slow
pressure loss.
Only use original BMW full wheel
covers, otherwise, the trim piece
may not fit securely. The full wheel
cover may not be installed on the
space-saver spare 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 torque bolts checked
with a calibrated lug wrench [torque
specification: 72 lb ft (100 Nm)] at the
earliest opportunity.<
When storing a wheel in the spare tire
recess take care to avoid bending the
threaded rod.
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.

133n
OverviewControlsMaintenanceRepairsDataIndex
Battery FusesBattery careThe battery is maintenance-free, that is,
the original electrolyte will normally last
for the service life of the battery under
moderate climatic conditions.
Please consult your BMW center
whenever you have any questions
concerning the battery. The battery is
completely maintenance-free; the
following section is provided for your
information only.<
Never disconnect the battery
when the engine is running; the
ensuing voltage surge would seriously
damage the vehicle's onboard elec-
tronic systems.<
Charging the batteryWhen charging the battery in the
vehicle, leave the engine off at all times.
Connect the charge cables to the termi-
nals in the engine compartment, for
information on terminal locations, refer
to Jump-starting on page 134.
Return used batteries to a recy-
cling point or your BMW center.
Maintain the battery in an upright posi-
tion for transport and storage. Secure
the battery against tilting during trans-
port.<
The fuses are located in the glove
compartment behind a cover secured
by two snap clips.
Do not attempt to repair a blown
fuse or replace it with a fuse
having a different color or amperage
rating. To do this could cause a fire in
the vehicle resulting from a circuit over-
load.<

Everything from A to Z
149n
OverviewControlsMaintenanceRepairsDataIndex
I
Ice warning69
Icy roads69
Ignition key28
Ignition lock56
Imprint4
Indicator lamps17
Inflation pressures,
tires24, 107
Inside rearview mirror
automatic dimming
feature49
INSPECTION67
Instrument cluster15
Instrument lighting83
Instruments15
Interface socket for onboard
diagnostics (OBD)121
Interior lamps30, 84
remote control30
Interior motion sensor37
avoiding unintentional
alarms37
deactivate by remote
control30
Interior rearview mirror48
Interlock56
J
Jack129
Jump-starting134 K
Key Memory55
Keys28
with remote control28 L
Lamps and bulbs,
replacement124
Lashing eyes99
LATCH child-restraint
mounting system52
Length141
License plate lamp
bulb replacement128
LIGHTS ON warning82
Litter bag holder93
Load-securing devices99
Lock buttons32
Louvers85
Low beams82
bulb replacement125
Lug wrench129 Luggage compartment35
bulb replacement127
capacity142
floor mat35
floor panel35
Luggage compartment
lid33
bulb replacement127
disconnect from central
locking system33
electrical malfunction33
manual operation33
operate via remote
control30
secure separately33
Luggage compartment
lighting33
Luggage compartment's
interior, emergency
release35
Luggage rack100
Lumbar support43
M
M+S tires111
Maintenance67, 119
Malfunction displays68
Manual operation
doors31
fuel filler door22
luggage compartment
lid33
sliding/tilt sunroof40
Manual seat adjustment42
Manual transmission58
Manually controlled recircu-
lated-air90
MFL (Multifunction steering
wheel)21
Microfilter87, 91
Microphone94
Mirror defrosting48
Mirror memory46
Mirrors48
Modifications,
technical10, 120
Motion sensor, refer to
interior motion sensor
Multifunction steering wheel
(MFL)21

Everything from A to ZN
Navigation system, refer to
the Radio or Onboard
Computer "Owner's
Manual" O
OBD interface socket121
Odometer66
Oil
additives115
capacity143
consumption115
level, checking115
Oil change intervals, refer to
the Service and Warranty
Information Booklet/
Warranty and Service
Guide Booklet
Oil dipstick115
Oil filter change143
OIL SERVICE67
Onboard Computer, refer to
the "Onboard Computer
Owner's Manual"
Onboard tool kit124 Opening and closing
from the inside32
via the door lock31
via the remote control29
Outlets, ventilation88
Outside temperature
display69
P
Paintwork, refer to the
"Caring for your vehicle"
manual
Park assistant71
Park Distance Control
(PDC)71
Parking aid71
Parking brake58
Parking lamps82
bulb replacement125
Passenger-side mirror tilt
function47
PDC (Park Distance
Control)71
Phone, refer to cellular
phone
Power140
Power windows37
safety switch38
Premium sound system91
Q
Quality Grades, tires108 R
Radiator143
Rain sensor62
RDC (Tire Pressure
Monitor)78
warning lamp17
Reading lamps
front84
rear84
Rear center 3-point belt96
Rear lamps127
Rear reading lamps84
Rear window
defroster86, 90
Rear-seat backrest,
removable96
Rearview mirror48
Recirculated-air mode86
Reclining seat41
Refueling22
Remote control29
Removable rear-seat
backrest96
Reporting safety defects11
Roller sun blind91
Roof weight142
Roof-mounted luggage
rack100
S
Safe with safety belts41
Safety belts45
height adjustment45
Safety defects, reporting11
Safety tires109, 132
Seat adjustment41
Seat heating47
Seat memory46
Seat, manually adjusted42
Seats41
Securing cargo99
Securing child-restraint
system54
Selector lever, automatic
transmission59
Service and Warranty Infor-
mation Booklet (US
models)119
Service Interval
Display67, 119
Setting temperature86
Shiftlock59
Side airbags49
Side Impact Head Protection
System49
Sitting correctly with
airbags41
Ski bag97