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EnglishOwner service procedures -> Battery for your BMW 7 Series 2001-2007
176nChanging tires
Battery
The vehicle jack is designed for
changing tires only. Do not at-
tempt to raise another vehicle model
with it or to raise any load of any kind.
To do so could cause accidents and
personal injury.
Have the lug bolts checked for proper
tightness with a calibrated torque
wrench at the earliest possibility (torque
specification: 72 lb-ft/100 Nm).<
When storing the wheel, take care to
ensure that you do not damage the re-
taining pin in the spare tire recess.
Installation location, BMW 740i/L Installation location, BMW 750iL
The battery is located behind the right- Two batteries are installed in the
side trim panel in the luggage compart- BMW 750iL. They are located in the
When light-alloy wheels other than
Original BMW light-alloy wheels are fit-
ted to the car, it may be necessary to
use different lug bolts.
ment.
luggage compartment behind the right
side trim panel.
Grasp the handle in the upper panel
and fold it down.
To check the charge condition or
for removal or installation, please
consult your BMW center.<
Replace the defective tire as soon as
possible and have the new wheel/tire
balanced.
Online Edition for Part No. 01 41 0 004 597 - © 08/99 BMW Group
Battery
177n
Battery posts, terminals, and re-
Be sure that children keep well
away from batteries and battery
acid.
In order to protect the battery
lated accessories contain lead
and lead compounds. Wash hands after
handling.<
case from ultraviolet radiation,
do not place it in direct sunlight.
A discharged battery can freeze. Store
the battery in areas where temperature
remains above freezing.
Never allow sparks or open
flame, and do not smoke in the
vicinity of the battery.
Maintenance
The battery is absolutely maintenance- Avoid sparks from electrical cables or
free. This means that the original elec-
trolyte will normally last for the service
life of the battery under moderate cli-
matic conditions.
electrical equipment. Turn the key to
position 0 in the steering lock when the
battery is disconnected or connected.
Do not short circuit the battery termi-
nals. This creates a risk of personal in-
jury from high-voltage sparks.
Symbols
You will find the following symbols on
your car battery. To avoid injury, please
observe the corresponding precautions
whenever you work with or near the
battery.
A highly-explosive gas is
generated when the battery is
charged.
If you happen to get acid in
your eyes, rinse thoroughly for
15 minutes with clear water.
Please read the following infor-
mation before working with the
battery.
Consult a physician immediately. If you
get acid spray on your skin or clothing,
rinse with plenty of water. If electrolyte
is accidentally ingested, consult a phy-
sician immediately.
Wear eye protection. Do not al-
low particles containing battery
acid or lead to come into con-
tact with your eyes, your skin, or your
clothing.
Battery acid is extremely corro-
sive. Wear eye protection and
protective gloves. Do not tip the
battery. Battery acid can leak from the
ventilation openings.
Online Edition for Part No. 01 41 0 004 597 - © 08/99 BMW Group
178nBattery
If you plan to park the vehicle longer
than 4 weeks, disconnect the battery
from the vehicle's electrical system by
disconnecting the cable from the nega-
tive terminal. Then have the battery
charged with an appropriate battery
charger.
Charging the battery
Charge the battery in the vehicle only
when the engine is off. Charge the bat-
tery using the supplementary positive
terminal and ground (terminal) in the
engine compartment (refer to "Jump-
starting" on page 183).
If the vehicle will not be driven for a
period longer than 12 weeks, have the
battery removed, charged and store it
in a clean and cool (frost-free) area.
Recharge the battery at least every
three months during storage. Also,
recharge the battery before it is in-
stalled. If you fail to do so, it will not be
serviceable. Every time the battery is
discharged, especially over extended
periods, its service life is reduced.
On the BMW 750iL, there is an auto-
matic switch between the two batteries
during charging.
Before performing any work on
the electrical system, disconnect
the cable from the negative terminal. If
you do not, short circuits can create the
risk of fire or personal injury.
Charge condition – BMW 740i/L
You can read the charge condition
of the battery with the "Magic Eye*"
(a hydrometer):
If a jump start is necessary, connect the
cables only to the auxiliary terminal for
jump starting and a ground in the en-
gine compartment in order to avoid
damage to the batteries (refer to
"Jump-starting" on page 183).<
> Green: Adequate charge
> Black: Not charged adequately. The
battery must be recharged. Please
contact your BMW center
Avoid environmental pollution
when disposing of old batteries.<
> Yellow: Replace the battery.
Return used batteries to a recy-
cling point or to your BMW center.
Maintain the battery in an upright posi-
tion for transport and storage. Secure
the battery against tilting in transit.<
The service life specified for the
battery can be achieved only if it is
always kept adequately charged.
Check the charge condition of the bat-
tery frequently if the vehicle is used pri-
marily for driving short distances.<
Online Edition for Part No. 01 41 0 004 597 - © 08/99 BMW Group
Battery
179n
Removal and installation
Do not disconnect the battery
when the engine is running. Dis-
connecting the battery cable when the
engine is running will cause a voltage
surge that will damage the vehicle's on-
board electronics.
Do not make any modifications in the
wires to the positive terminal. If you do
so, the protective function of the safety
battery terminal is no longer ensured.
Repairs and disposal may only be per-
formed by specially-trained person-
nel.<
BMW 740i/L: When removing the bat-
tery, disconnect the negative terminal
first, then the positive terminal.
BMW 750iL: Please contact your autho-
rized BMW center for additional infor-
mation.
Unscrew the battery retaining clamp
(arrow).
When installing the battery, connect the
positive terminal first, then connect the
negative terminal.
Battery posts, terminals, and re-
lated accessories contain lead
and lead compounds. Wash hands after
handling.<
When installing a battery, be sure
that it is mounted properly. If the
battery is not mounted properly, it will
not be adequately secured in case of an
accident.<
Online Edition for Part No. 01 41 0 004 597 - © 08/99 BMW Group
