ECU BMW 540I SEDAN 2003 Owner's Manual

139n
OverviewControlsMaintenanceRepairsDataIndex
HoodTo unlockPull the lever located under the left-
hand side of the instrument panel.
Do not work on your vehicle
without appropriate skills. 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.<390de759
To openPull the release handle and open the
hood.390de760
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, as with all closing
procedures.
If you notice that the hood is not com-
pletely closed while driving, stop imme-
diately and close it securely.< 390de761

154n
Lamps and bulbsXenon lamps
*
The operating life of these lamp units is
extremely long and the likelihood of
failure very low, provided that they are
not switched on and off an excessive
number of times. If one of these bulbs
should nevertheless fail, it is possible to
continue driving with great caution
using the fog lamps, provided traffic
laws in your area do not prohibit this.
Because of the extremely high
voltages involved, any work on the
xenon lighting system should be carried
out by technically-qualified personnel
only. Otherwise, there is a risk of fatal
injury.<
Standing lamps10 watt bulb
The bulb holder and reflector are a
single unit and are both changed
at the same time.<
1. Turn the bulb holder with reflector to
the left and remove
2. Disconnect the plug
3. Plug the new bulb holder into the
plug connector. Be sure that it is
securely engaged
4. Insert the reflector with bulb holder
and turn to the right as far as
possible.390de669
Turn signal indicator/Parking
lamps (side marker lamps)Dual-filament bulb, 21 watt
1. Turn the bulb to the left and remove
2. Remove and replace the bulb.390de670

159n
OverviewControlsMaintenanceRepairsDataIndex
Changing a wheelWhat you will needIn order to avoid rattling noises later,
note the position of the tools when you
remove them and return them to their
original positions when you are through
using them.
>Car jack
sedan: fold back the luggage com-
partment floor mat for access, then
unscrew the wingnut to release the
jack (arrow).
sport wagon: raise the floor panel
and spare tire cover (refer to
page 127).
When you have completed work,
screw the jack all the way back
down. Fold the handle back and
insert it in its holder394de090
>Wedge (wheel chock)
Located next to the jack. Loosen the
wingnut to remove it
>Spare tire and adapter
* for removing
the lug bolt cover
* (refer to the next
page)
Both are next to the jack. Remove the
adapter or the plastic cover. Unscrew
the wingnut (arrow) by hand and
remove the wheel
>Lug wrench and screwdriver
In the onboard tool kit under the lug-
gage compartment lid (refer to
page 152).
sport wagon: the lug wrench is next
to the spare tire.
394de091
Procedure1. Carefully read and comply with the
safety precautions 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 down-
ward slope, place the wedge
securely in front of the tire. If the
wheel must be changed on a sur-
face with a more severe slope, take
additional precautions to secure the
vehicle from rolling
3. Wheels with full wheel covers
*:
Reach into the ventilation openings
and pull the cover off

160n
Changing a wheel4. Wheels with adapter
*: position the
lug bolt adapter on the lug bolt
cover. Then apply the lug wrench
and turn it to the left (refer to the
illustration)
5. Wheels with hub cover*: pry the
hub cover off with the screwdriver
in the slot
6. Loosen the lug bolts 1/2-turn
390de773
7. Position the jack at the jacking
point closest to the flat tire so that
the jack base is vertically below the
jacking point and the entire surface
of the head of the jack will move
into the square recess of the
jacking point (refer to the illustration
detail) when the jack is cranked
8. Jack the vehicle up until the wheel
you are changing is raised from the
ground
9. Unscrew the lug bolts and remove
the wheel
10. Remove accumulations of mud or
dirt from the mounting surfaces of
the wheel and hub. Clean the lug
bolts390de707
11. Position the spare tire. Secure the
wheel by turning at least two lug
bolts into opposite bolt holes
12. Screw in the remaining lug bolts.
Tighten all the bolts securely in a
diagonal pattern
13. Lower the jack and remove it from
beneath the vehicle
14. Tighten the lug bolts in a diagonal
pattern
15. Wheels 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
For this light-weight wheel, use
only the full wheel cover installed
by the factory. Other wheel covers may
not fit securely.< 390de360

162n
Battery Fuses
Battery posts, terminals and other
components contain lead and lead
compounds. Wash hands after han-
dling.<
Battery careThe battery is maintenance-free, that is,
the original electrolyte will normally last
for the service life of the battery under
moderate climatic conditions.
For all questions that regard the
battery, please consult your BMW
center. The battery is completely main-
tenance-free; the following section is
provided for your information only.<
Do not disconnect the battery
when the engine is running, as the
ensuing voltage surge would damage
the vehicle's onboard electronics.<
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 ter-
minal locations, refer to "Jump-starting"
on page 164).
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.<
In the glove compartmentOpen the glove compartment and turn
the two white quick-release fasteners
to the left.390de085

Everything from A to Z
181n
OverviewControlsMaintenanceRepairsDataIndex
Instrument displays15
Instrument lighting104
Instruments15
Intensive cleaning141
Interior lamps105
Interior mirrors58
Interior motion sensor42
avoiding unintentional
alarms44
deactivate35
Interior rearview mirror57
automatic dimmer58
Interlock68 J
Jack159
Jump-starting164t K
Key Memory67
Key with remote control32
Keys32
Kickdown73, 76 L
Lamp switch103
Lamps and bulbs153t
Lashing eyes to secure the
load128
Length of vehicle171 Level control
system21, 101
License plate lamps
bulb replacement158t
Lighter120
LIGHTS ON warning103
LIMIT93
Load-securing devices128
Louvers106, 109
Low beams103
bulb replacement153t
Low-fuel warning lamp83
Lug bolts160
Lug wrench159t
Luggage
compartment38, 42, 125
capacity173
manual operation38t
Luggage compartment
lid38
electrical malfunction38
emergency release from
luggage compartment's
interior41
opening from the
outside39
opening separately38
remote control35
secure separately38
Luggage compartment's
interior, emergency
release41 Luggage net42
Luggage straps42
Lumbar support50
M
M+S tires138
Maintenance84, 146t
Malfunction displays85t
Manual operation
doors33
fuel filler door24
luggage compartment
lid38
sliding/tilt sunroof47
tailgate39
Manual transmission71
Manually controlled
recirculated-air112
Manually-adjusted seat49
Master key32
Maximum cooling112
Memory settings
for seat, mirror and
steering wheel54
related to individuals ("Key
Memory")67
related to the vehicle
("Vehicle Memory")67
Microfilter108, 114
MID (Multi-Information
Display)89 Mirrors57
adjusting57
automatic dimming
feature58
defrosting57
memory setting54
Modifications,
technical9, 147
Monitoring inflation
pressure, tires101
Moonroof47
Multifunction buttons,
steering wheel22
Multi-Information Display
(MID)89
N
Non-smoker's
equipment120 O
OBD interface socket148
Odometer16, 82
Oil additives142
Oil change interval, refer to
the Service and Warranty
Information Booklet (US
models) or to the Warranty
and Service Guide Booklet
(Canadian models)
Oil consumption142

Everything from A to ZOil dipstick142t
Oil level, indicator lamp20
Oil pressure, indicator
lamp19
Oil specifications143t
Oil viscosity143
Oils, disposal143t
OILSERVICE84
Old batteries162
Onboard computer, refer to
the "Owner's Manual for
Onboard Computer"
Onboard Diagnostic (OBD)
system148
Onboard Diagnostics
(OBD)148
Onboard tool kit152t
Opening and closing
from the inside37
from the outside33
using the key33
using the remote
control33
Opening the rear
window40
Operating range88
Outlets,
ventilation106, 109
Outside temperature
display82, 88
P
Park Distance Control
(PDC)98
Parked-car ventilation
system114
for additional information
refer to the "Owner's
Manual for Onboard
Computer"
Parking aid98
Parking brake20, 70
Parking lamps103
bulb replacement154t
Partition net125
Passenger-side mirror tilt
function55
PDC (Park Distance
Control)98
Pocket light118
Pollen filter108, 114
Power windows45
safety switch45
Power-slip control, refer to
ASC+T/DSC99 Q
Quality Grades, tires136
R
Rain sensor78
RDC (Tire Pressure
Monitor)101
Reading lamps105
Rear ashtray120
Rear window40
defroster107, 112
sun blinds114
wiper79
Rear window cleaning79
Rear-seat backrest
fold121
folding121
Rearview mirror57
Recirculated-air mode107
Reclining seat48
Refueling24
Releasing hood139
Reminder signal (Memo)91
Remote control34
computer97
Remove condensation from
windows108, 111
Replacing
fuses162t
lamps and bulbs153t
wiper blades152t
Reporting safety defects10 Reservoir, washer
system141t
Residual heat113
Rims137
Roller sun blind114
Roll-up cover125
Roof load capacity173
Roof-mounted luggage
rack129
S
Safety belts53
Safety defects, reporting10
Safety lock buttons37
Seat belts53
Seat heating55
Seats
electric power50
heating55
manually-adjusted49
memory setting54
Secure the load128
Securing cargo42, 128
Selector lever, automatic
transmission72, 75
Self-leveling
suspension101
inactive21
Service and Warranty10
Service and Warranty
Information Booklet (US
models)146

Everything from A to Z
183n
OverviewControlsMaintenanceRepairsDataIndex
Service Interval
Display84, 146
Shiftlock72, 75
Shoulder support51
Side airbags59
Side Impact Head Protection
System59
Side lamps
bulb replacement154t
Side turn signal indicators
bulb replacement155t
Sitting safely48
with airbags48
with safety belt48
Ski bag122
Ski bag in the sport
wagon124
Sliding/tilt sunroof46
manual operation47
with glass moonroof47
Snow chains138
Socket for attaching
electrical appliances120
Spare tire159t
Speaker119
Special characteristics of
winter tires138
Special oil143t
Speed96
Speed limit93
Speed, average88, 96
Speedometer15, 16, 17 sport wagon
cargo area125
compartments in the cargo
area126
cover in the cargo
area126
folding down the rear
backrest125
lashing eyes128
load-securing
devices128
opening the rear
window40
partition net125
rear window wiper, blade
replacement152t
releasing the tailgate after
an electrical
malfunction39
roll-up cover125
securing a load128
ski bag124
tail lamp assembly, bulb
replacement156t
Standing lamps104
Starting assistance164t
Starting problems69t
Starting the engine69
Steering wheel
heating56
lock68
memory setting54 Steering wheel with
multifunction buttons22
Steptronic75
Stopwatch91
for additional information
refer to the "Owner's
Manual for Onboard
Computer"
Storage compartments118
in the cargo area126
Summer tires137
Sun blinds114
Sunroof46
Switching off the engine70
Switch-on times for parked-
car ventilation92
Symbols8
T
Tachometer83
Tail lamps156
bulb replacement156t
Tailgate
manual operation39
manual release39
opening from the
inside40
opening from the
outside39
Technical
modifications9, 147
Telephone preparation119 Temperature display82, 88
Temperature gauge84
Temperature
layering108, 113
Tether strap62
Third brake lamp157
Through-loading
system121
Tilt alarm sensor42, 43
avoiding unintentional
alarms44
deactivate35
Tilt function, passenger-side
mirror55
Time
calling up90
changing90
of arrival, estimated95
Timer90
for additional information
refer to the "Owner's
Manual for Onboard
Computer"
Tire
change158t
damage135t
inflation pressure26, 135
pressure
monitoring101, 135
replacement136
tread135
Tire inflation pressure26