2001 BMW 540I SEDAN brake pads

IndexDataTechnologyRepairsCar careControlsOverview

19n

Instrument cluster

There are two versions, depending on
the equipment on your vehicle.
1 Fuel gauge with indicator lamp for
fuel reserve84
2 Indicator lamp for turn signals24
3 Speedometer
4 Indicator lamp for high beams24
5 Tachometer and
Energy Control84
6 Coolant thermometer with
"Coolant temperature too high"
warning lamp85
7 Indicator and warning lamps for:

>

Parking brake/Brake hydraulic
system, Dynamic Brake Control
(DBC)

*
22, 23

>

Antilock Brake System (ABS)23

>

Brake pads23

>

Tire Pressure Control (RDC)

*
23

>

Airbags23

>

Automatic transmission

*
23

>

Please fasten safety belts23

>

Cruise control24
8 Selector lever and program display
for automatic transmission

*
72, 75
9 Service Interval Display8510 Display for the computer
(operation via the turn signal lever,
refer to page 89):

>

Outside temperature

>

Average fuel consumption

>

Cruising range

>

Average speed
11 Indicator lamp for Automatic
Stability Control plus Traction
(ASC+T)/Dynamic Stability
Control (DSC)

*
24
12 Indicator lamp for level control
system

*
23
13 Odometer and trip odometer83
14 Indicator for Check Control86
15 Reset button for trip odometer83
16 Indicator and warning lamps for:

>

Fog lamps24

>

Battery charge current22

>

Engine oil level/Engine oil
pressure22, 23

>

Engine electronics24

>

Service Engine Soon24

22n
Indicator and warning lampsTechnology that monitors itselfMany of the systems of your BMW
monitor themselves automatically, both
during engine starts and while you are
driving. Indicator and warning lamps
that are identified by "l" are tested for
proper functioning whenever the igni-
tion key is turned. They each light up
once for different periods of time.
If a fault should occur in one of these
systems, the corresponding lamp does
not go out after the engine is started or
it lights up while the vehicle is moving.
You will see how to react to this below.
Red: stop immediately
Battery charge current l
The battery is no longer being
charged. There is a malfunction
of the alternator V-belt or in the charg-
ing circuit of the alternator. Please con-
tact the nearest BMW center.
If the ribbed V-belt is defective, do
not continue driving. The engine
could be damaged due to overheating.
If the ribbed V-belt is defective, in-
creased steering effort is also re-
quired.<
Engine oil pressure l
Comes on while the engine is
running and the "STOP!ENGINE
OILPRESS" message appears in the
Check Control: stop vehicle immedi-
ately and switch off engine. Check level
of oil in engine, top up as required. If oil
level is correct: please contact the
nearest BMW center.
Do not continue driving. The en-
gine could be damaged because
of inadequate lubrication.<
Tire Pressure Control (RDC)
* l
In addition, there is an acousti-
cal warning signal: a tire failure
has occurred. Reduce vehicle speed
immediately and stop the vehicle. Avoid
hard brake applications. Do not over-
steer. For additional information: refer
to page 103.
Parking brake
*,
brake hydraulic system l
Comes on when you engage the
parking brake. For additional informa-
tion: refer to page 70.
Comes on although the parking brake is
released: have the brake fluid level
checked. Before driving further, be
sure to read the notes on pages 146
and 168.
Also comes on with the message
"CHECK BRAKE PADS" in the Check
Control.
Parking brake* warning lamp/
Brake hydraulic system for
Canadian models.

IndexDataTechnologyRepairsCar careControlsOverview
23n
Indicator and warning lampsRed: an important reminder
Parking brake
*
Comes on when you engage the
parking brake.
For additional information: refer to
page 70.
Parking brake
* warning lamp
for
Canadian models.
Please fasten safety belts l
Together with an acoustic signal
or a message
* in the Check
Control. Comes on until the safety belts
are fastened. For additional information
on safety belts: refer to page 61.
Airbags l
Please have the system in-
spected by your BMW center.
For additional information: refer to
page 62.
Yellow: check as soon as possible
Antilock Brake System (ABS) l
ABS has been deactivated in
response to system malfunction.
Conventional braking efficiency is avail-
able without limitations. Please have
the system inspected by your BMW
center.
For additional information: refer to
page 143.
Antilock Brake System (ABS)
warning lamp for Canadian
models.
Engine oil level
*
Comes on while driving: the oil
level is at the absolute mini-
mum; refill as soon as possible. Do not
drive more than approx. 30 miles
(50 km) until you add oil.
For additional information: refer to
page 165.
Engine oil level
*
Comes on after the engine has
been shut off: add oil at the
earliest opportunity (when you stop to
refuel).
For additional information: refer to
page 165.
Automatic transmission
*
Because of a malfunction, the
automatic transmission shifts
only in the emergency program. Please
consult the nearest BMW center.
For additional information: refer to
pages 74, 77.
Brake pads
* l
Have the brake pads checked.
For additional information: refer
to page 146.
Dynamic Brake Control
(DBC)
* l
Fault in the DBC system. Con-
ventional braking efficiency is available
without limitations.
For additional information: refer to
page 145.
Dynamic Brake Control (DBC)
warning lamp for Canadian
models.
Tire Pressure Control (RDC)
* l
Check the tire inflation pressure.
Refer to pages 29, 103.
Level control system
* l
The level control system is
inactive. Please consult the
nearest BMW center.
For additional information: refer to
page 148.

88n
Check Control>CHECK LOWBEAM LIGHTS
CHECK SIDE LIGHTS
CHECK REAR LIGHTS
CHECK FRONT FOGLAMPS
CHECK LICPLATE LIGHT
CHECK HIGHBEAM LIGHTS
CHECK BACK UP LIGHTS
Defective bulb or circuit. Refer to
pages 183 and 196 or consult your
BMW center.
>TRANS. FAILSAFE PROG
Please consult the nearest BMW
center. Refer to pages 74, 77.
>CHECK BRAKE LININGS
Have the brake pads inspected by
your BMW center. Refer to page 146.
>CHECK COOLANT LEVEL
Coolant too low, top up at the next
opportunity. Refer to page 167.
>ENGINE FAILSAFE PROG
*
The electronics allow for continued
driving with reduced engine output or
rpms.
Please have the system inspected by
your BMW center.
Displays after completion of tripAll of the malfunctions registered during
the trip appear consecutively when the
key is turned to position 0.
One of the following displays may ap-
pear:
>LIGHTS ON
>KEY IN IGNITION LOCK
>CHECK ENGINE OIL LEV
Add engine oil at the next opportunity
(next stop for fuel). Refer to page 16 5.
Display appears when you open the
driver's door after parking the vehicle.
A supplementary gong is also heard.
Status reports remain available for a
period of approx. three minutes after
the display goes out and the key is re-
moved from the ignition. Press the
CHECK button. If there were multiple
reports, press the CHECK button re-
peatedly to view them all in sequence.
To check the Check ControlPress the CHECK button 3 with the
ignition key in position 2:
CHECK CONTROL OK appears in the
display.
No malfunctions are present in the
monitored systems.
You can have the Check Control
messages displayed in a different
language.<

140nBreak-in procedure
To ensure that your vehicle provides
maximum economy throughout a long
service life, we request that you ob-
serve the following.
Engine and differential
Up to 1,200 miles (2,000 km):
Drive at varying engine speeds and
road speeds, but do not exceed
4,500 rpm and the following road
speeds during this initial period:
BMW 525i, 530i: 100 mph (160 km/h)
BMW 540i: 106 mph (170 km/h)
Obey your local and state maximum
speed limits.
Refrain from using full throttle and avoid
pressing the accelerator beyond the
kickdown point.
Once you have driven 1,200 miles
(2,000 km), engine and vehicle speeds
can gradually be increased.
You should also comply with these
break-in procedures if the engine or dif-
ferential is replaced later in the course
of the vehicle service life.
Tires
Due to technical factors associated
with their manufacture, tires do not
achieve their full traction potential until
an initial break-in period has elapsed
for this reason, drive with extra care
during the initial 200 miles (300 km).
Obey your local and state maximum
speed limits.
When the vehicle is operated on
wet or slushy roads, a wedge of
water may form between the tire and
the road surface. This phenomenon is
referred to as aquaplaning, or hydro-
planing, and can lead to partial or com-
plete loss of traction, vehicle control
and braking effectiveness. Reduce your
speed on wet roads. <
Brake system
Approximately 300 miles (500 km) must
elapse before the brake pads and ro-
tors achieve the optimal pad-surface
and wear patterns required for trouble-
free operation and long service life later
on.
To break in the separate parking brake
drums, apply the parking brake lightly
when coasting to a standstill (at a traffic
signal, for instance), provided that traf-
fic conditions allow you to do so. To
avoid corrosion, repeat this procedure
from time to time.
The brake lamps do not come on
when the parking brake is applied.
Vacuum for the brake system servo unit
on your BMW is available only when the
engine is running. When you move the
car with the engine shut off – when
towing, for instance – substantially
higher levels of pedal force will be
required to brake the vehicle. <
Clutch
The clutch will also begin to function
optimally after about 300 miles
(500 km). Engage the gears carefully
during the break-in period.

144nAntilock Brake System (ABS) Disc brakes
Information for your safety
Not even ABS can suspend the laws of
physics. The consequences of brake
applications with inadequate safety
clearances between vehicles, exces-
sive speed or if aquaplaning occurs are
always the responsibility of the driver.
You should never allow the added
safety margin of ABS to mislead you
into taking risks of any kind.
Do not make any modifications to
the ABS system.
Service procedures on ABS are to be
performed by authorized technicians
only. <
In the event of a fault
The ABS warning lamp in the in-
strument cluster comes on, refer
to page 23. The brake system
then reverts to conventional op-
eration as on vehicles without
ABS. However, have the brake
system checked by your BMW center
as soon as possible. To prevent unde-
tected defects and cumulative faults
from adversely affecting the brake sys-
tem, refer any problems to your BMW
center at the earliest opportunity.
Disc brakes furnish optimum decelera-
tion and braking control and greater
fade resistance under heavy use.
When the vehicle is driven only occa-
sionally, during extended periods when
the vehicle is not used at all, and in
operating conditions where brake appli-
cations are less frequent, there is an
increased tendency for corrosion of the
rotors and accumulation of contamina-
tion on the brake pads. This occurs
because the minimal pressure which
must be exerted by the pads during
brake applications to clean the rotors is
not reached.
If the brake rotors are corroded, they
will tend to respond to braking with a
pulsating effect which even extended
application will fail to cure.
For your own safety: use only
brake pads that BMW has
approved for your specific vehicle
model. BMW cannot evaluate non-
approved brake pads to determine if
they are suited for use, and therefore
cannot ensure the operating safety of
the vehicle if they are installed. <

Index
Data
Technology
Repairs
Car care
Controls
Overview
145nDisc brakes
Driving notes
When driving in wet conditions and in
heavy rain, it is effective to apply light
pressure to the brake pedal every few
miles (kilometers). Watch traffic condi-
tions to ensure that this maneuver does
not endanger other road users. The
heat which is generated by the brake
applications helps to dry the brake
pads and rotors.
Maximum braking force is obtained
while the wheels continue to rotate,
peaking when the wheels remain on the
verge of locking without actually doing
so. ABS maintains this state automati-
cally. If the ABS fails, you should revert
to the staggered braking technique
described below (refer to page 147).
Extended or steep mountain descents
should be driven in the gear in which
only minimal periodic brake applica-
tions is required. This avoids excessive
strain on the brakes and possible im-
pairment of the braking effect.
The braking effect of the engine can be
further increased by downshifting, into
first gear, if necessary. In the manual
mode of the automatic transmission,
you can also downshift into first gear.
Refer to page 76. Should engine braking prove inade-
quate, you should still avoid extended,
continuous braking. Instead of main-
taining low to moderate pressure over
an extended period of time, you should
decelerate by applying more substantial
pressure to the brake pedal (watch for
following traffic!), then releasing the
pedal, then repeating the application.
This staggered braking technique
allows the brakes to cool in the intervals
between active braking phases,
preventing overheating and ensuring
that full braking capacity remains avail-
able at all times.
Do not coast with the clutch de-
pressed or with the transmission
or selector lever in Neutral. Do not
coast with the engine shut off. The
engine provides no braking effect when
the clutch is depressed or the transmis-
sion is in neutral, and there is no
power-assist for braking or steering
when the engine is not running.
Never allow floor mats, carpets or any
other objects to protrude into the area
around the accelerator, clutch and
brake pedals and obstruct their move-
ment. <
Dynamic Brake Control (DBC)*
If you apply the brakes rapidly, this
system automatically produces the
maximum braking force boost and thus
helps to achieve the shortest possible
braking distance during "panic stops."
All of the benefits of the ABS system
are exploited under these circum-
stances.
Do not reduce the pressure on the
brake pedal for the duration of the
brake application. When the brake
pedal is released, the DBC is deacti-
vated.
In the event of a malfunction, the yellow
warning lamp comes on. Conventional
braking efficiency is available without
limitations.
Have the system checked and repaired
at your BMW center as soon as possi-
ble.
For "Information for your safety"
covering the ABS system, refer to
page 144. This information also gener-
ally applies for DBC. <

146nBrake system Winter operation
Brake fluid level
The warning lamp for the brake
hydraulic system comes on, or
the "CHECK BRAKE FLUID"
message appears in the Check
Control.
The brake fluid level is too low in the
reservoir (refer to page 168).
If the brake fluid level is too low and
brake pedal travel has become notice-
ably longer, there may be a defect in
one of the brake system's hydraulic
circuits.
Proceed to the nearest BMW
center. Higher brake application
pressure may be necessary under these
conditions, and brake pedal travel may
be significantly longer. Please remem-
ber to adapt your driving style accord-
ingly. <
The warning lamp comes on together
with the "CHECK BRAKE PADS" mes-
sage in the Check Control.
Brake pads
The warning lamp for the brake
pads comes on, or the "CHECK
BRAKE LININGS" message
appears in the Check Control:
The brake pads have reached their
minimum pad thickness. Proceed to the
nearest BMW center as soon as possi-
ble to have the pads replaced.
For your own safety: use only
brake pads that BMW has
approved for your specific vehicle
model. BMW cannot evaluate non-
approved brake pads to determine if
they are suited for use, and therefore
cannot ensure the operating safety of
the vehicle if they are installed. <
The onset of winter is often accompa-
nied by rapid changes in weather.
Adaptations in driving style should be
accompanied by preparations on the
vehicle itself to ensure that your vehicle
operation through the winter remains
safe and trouble-free.
Coolant
Ensure that the coolant mixture con-
tains the year-round ratio of 50: 50 of
water and antifreeze/corrosion inhibitor.
This mixture provides protection
against freezing down to approx. -34 7
(-37 6). Replace the coolant every four
years.
Locks
BMW door lock deicer can be used to
free the locks if they are frozen. This
deicer also contains lubricant.
After using deicer, treatment with BMW
lock barrel grease is recommended.