2001 BMW 540I SEDAN air suspension

6n

For your own safety

Use unleaded gasoline only. Fuels
containing up to 10% ethanol or
other oxygenates with up to 2.8% oxy-
gen by weight (that is, 15% MTBE or
3% methanol plus an equivalent
amount of co-solvent) will not void the
applicable warranties with respect to
defects in materials or workmanship.
Field experience has indicated signifi-
cant differences in fuel quality (volatility,
composition, additives, etc.) among ga-
solines offered for sale in the United
States and Canada. The use of poor-
quality fuels may result in driveability,
starting and stalling problems, espe-
cially under certain environmental con-
ditions, such as high ambient tempera-
ture and high altitude.
Should you encounter driveability pro-
blems that you suspect could be rela-
ted to the fuel you are using, we recom-
mend that you respond by switching to
a recognized high-quality brand.
Failure to comply with these recom-
mendations may result in unscheduled
maintenance.
Follow the relevant safety rules when
you are handling gasoline.

<



Important safety information!
For your own safety, use genuine parts
and accessories approved by BMW.
When you purchase accessories tested
and approved by BMW and Original
BMW Parts, you simultaneously acquire
the assurance that they have been
thoroughly tested by BMW to ensure
optimum performance when installed
on your vehicle.
BMW warrants these parts to be free
from defects in material and workman-
ship.
BMW will not accept any liability for
damage resulting from installation of
parts and accessories not approved by
BMW.
BMW cannot test every product from
other manufacturers to verify if it can be
used on a BMW safely and without risk
to either the vehicle, its operation, or its
occupants.
Original BMW Parts, BMW Accessories
and other products approved by BMW,
together with professional advice on
using these items, are available from all
BMW centers.

Installation and operation of non-BMW
approved accessories such as alarms,
radios, amplifiers, radar detectors,
wheels, suspension components, brake
dust shields, telephones (including
operation of any portable cellular phone
from within the vehicle without using an
externally-mounted antenna) or trans-
ceiver equipment (for instance, CBs,
walkie-talkie, ham radio or similar ac-
cessories) may cause extensive da-
mage to the vehicle, compromise its
safety, interfere with the vehicle's elec-
trical system, or affect the validity of the
BMW Limited Warranty. Visit your BMW
center for additional information.

<


Maintenance, replacement, or re-
pair of the emission control de-
vices and systems may be performed
by any automotive repair establishment
or individual using any certified auto-
motive part.

<



Symbol on vehicle parts

Indicates that you should consult
the relevant section of this
Owner's Manual for information on a
particular part or assembly.

Contents

Operation, care and maintenance
Owner service procedures
Advanced technology

Under the hood:

Hood159
Engine compartment160
Washer fluids164
Washer nozzles164
Engine oil165
Coolant167
Brake fluid168
Vehicle Identification
Number169

Care and maintenance:

The BMW Maintenance
System170
Caring for your car171
Airbags176
Vehicle storage176

Laws and regulations:

Technical modifications177
California Proposition
65 Warning177
OBD interface socket178

Replacement procedures:

Onboard tool kit182
Wiper blades182
Lamps and bulbs183
Changing a wheel190
Battery193
Fuses196

In case of electrical
malfunction:

Fuel filler door198
Sliding/Tilt sunroof198
Tailgate199

Assistance, giving and
receiving:

Jump-starting200
Towing the vehicle201Airbags206
Adaptive Transmission Control
(ATC)207
Automatic Stability Control plus
Traction (ASC+T)/Dynamic
Stability Control (DSC)208
BMW active seat210
Safety belt tensioner210
DSP sound system211
Mirrors with automatic
dimmer211
Rain sensor212
Tire Pressure Control (RDC)213
Integrated rear suspension214
Level control system214
Xenon lamps215

Index
Data
Technology
Repairs
Car care
Controls
Overview
201nJump-starting Towing the vehicle
6 Start the engine of the support
vehicle and let it run.
7 Start the engine on the vehicle needing the jump-start, and allow it
to run as usual. If the first start at-
tempt is not successful, wait a few
minutes before another attempt in
order to allow the discharged battery
to recharge.
8 Before disconnecting the jumper cables from your BMW, turn on the
headlamps, the rear window
defroster and the highest blower
speed and allow the engine to run
at least 10 seconds to prevent a volt-
age surge at the voltage regulator.
9 Then disconnect the jumper cables in the opposite order.
Have the battery recharged if neces-
sary.
Tow fitting
The 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, and is intended for towing
on proper road surfaces only.
It should not be used to pull a vehicle
out of deep snow, mud, sand, etc. Al-
ways observe all applicable towing laws
and regulations.
Access to tow sockets
Front:
Apply pressure to the arrow symbol on
the cover panel to remove.
390de087
Rear:
Apply pressure to the arrow symbol on
the cover panel to remove.
Screw the tow fitting in until it bot-
toms firmly. If this is not done, the
threads could be damaged.
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 pos-
sible accidents. <
Use only a nylon towing strap to tow
the vehicle, since the inherent resil-
ience of this material helps protect both
vehicles from sudden jerking move-
ments.
394de088

Index
Data
Technology
Repairs
Car care
Controls
Overview
Overview
Controls and features Operation, care
and maintenance
Owner service procedures
Technical dataIndex
Advanced technology
205
n
Airbags 206
Adaptive Transmission Control (ATC) 207
Automatic Stability Control plus Traction (ASC+T)/Dynamic
Stability Control (DSC) 208
BMW active seat 210
Safety belt tensioner 210
DSP sound system 211
Mirrors with automatic dimmer 211
Rain sensor 212
Tire Pressure Control (RDC) 213
Integrated rear suspension 214
Level control system 214
Xenon lamps 215

214nIntegrated rear suspension Level control system*
The control arms on the patented inte-
grated aluminum rear axle assembly are
not mounted directly on the body. They
are mounted elastically on a chassis
sub-frame which is joined in turn with
elasticity to the vehicle body. The result-
ing double elastic suspension system
effectively absorbs the forces resulting
from bumps and road surface irregulari-
ties.
The compliance rates of the integrated
rear axle assembly's control arm mounts
have been precisely calibrated to help
provide supplementary adjustment in
the tracking angle of the rear wheels
(programmed self-steer effect). The ulti-
mate result is enhanced safety and con-
trol under all conditions.
390de114
The illustration shows the rear axle of the
sedan. With the lightweight, compact
rear axle of the sport wagon, the shock
absorbers are positioned at an angle.
The level control system for the rear
axle maintains constant ground clear-
ance of your vehicle, even when carry-
ing a load.
To achieve this, the vehicle is equipped
with air struts at the rear axle instead of
conventional shock absorbers and steel
suspension springs. With the help of
two sensors, an electronic control unit
calculates the height of the body at all
times and, if it is required, it allows air
which is generated in a compressor to
flow into the air springs.
As a result of the pressure increase in
the air springs, the level control system
ensures not only constant ride height,
but also ride comfort which is indepen-
dent of the load the vehicle is carrying.
390de136

Everything from A to Z

231n

IndexDataTechnologyRepairsCar careControlsOverview

Height219
Height adjustment
seats52
steering wheel56
Help with jump
starting200

t

HiFi system211
High beams24
bulb replacement183

t

High Performance Synthetic
Oils166
High-mount brake lamp187
Hood release159

t

Horn25
Hydraulic Brake Assistant,
refer to DBC23, 100, 145

I
Ice warning83
Identification number of the
vehicle169
Identification, tires153
Ignition key36
Ignition lock68
Imprint4
Independent
ventilation94, 120
Independent ventilation,
refer also to the onboard
monitor Owner's Manual
Indicator lamps22

t

Inflation
pressure29

t

, 30, 150
monitoring103, 213
INSPECTION85
Instrument cluster18, 20
Instrument lighting105
Instrument panel20
Instrument panel switch78
Instruments18
Integrated rear
suspension214
Intensive
cleaning78, 79, 164
Interaxle tire rotation152
Interference indicators86
Interference with
car phones149
Interior lamps106
bulb replacement188

t

remote control40
Interior mirror57
with automatic dimming
feature211
Interior motion sensor48
deactivation48
Interior rearview mirror
with automatic dimming
feature57
Interlock68
Intermittent mode78

J
Jack190

t

Jump starting200

t
KKey Memory60
Key, transmitter36
Keys36
Keys with remote control36
Kickdown73, 76LLashing eye136
Leather care175
Length219
Level control
system23, 214
inactive148t
License plate lamps, bulb
replacement188t
Light switch105
Light-alloy wheels156
Lighter126
Lights-on warning105
LIMIT95
Load-securing devices136
Locking and unlocking the
doors38
Louvers108, 114
Low beams105
bulb replacement183tLow-fuel warning lamp84
Lug bolts191
Lug wrench191t
Luggage compartment46
capacity221
hanger46
lamps106
Luggage compartment
lamps, bulb
replacement189t
Luggage compartment lid/
tailgate43
emergency actuation43
opening separately43
remote control41
secure separately43
unlock in case of electrical
fault43t
Luggage space46
Luggage straps46
Lumbar support54
MM+S tires154
Magic Eye194
Maintenance85t, 170t
Malfunction displays86t