Owner service procedures -> Battery for your BMW 5 Series 1995-2003

166nBattery  
Never allow sparks or open  
flame near the battery. Do not  
smoke in the vicinity of the bat-  
Maintenance  
The battery is absolutely maintenance-  
free, that is, the original electrolyte will  
normally last for the service life of the  
battery under moderate climatic  
conditions.  
tery. Avoid sparks from electrical cables  
or electrical equipment. Turn the key  
to position 0 in the steering lock when  
connecting or disconnecting the bat-  
tery. Don't short-circuit the battery ter-  
minal. If you do so, you could be injured  
by electrical sparks.  
Symbols  
You will find the following symbols on  
your vehicle battery. To avoid injury,  
please comply with the corresponding  
precautions whenever you work with or  
near the battery.  
A highly-explosive gas is  
generated when the battery is  
charged.  
Battery posts, terminals, and  
related accessories contain lead  
and lead compounds. Wash hands after  
handling.<  
If you happen to get acid in  
your eyes, rinse thoroughly for  
15 minutes with clear water.  
Before handling the battery,  
please read the following infor-  
mation:  
Consult a physician immediately. If your  
skin or clothing are splashed by acid,  
rinse immediately with plenty of water.  
If electrolyte is accidentally swallowed,  
consult a physician immediately.  
Wear eye protection. Do not  
allow particles containing bat-  
tery acid or lead to come into  
contact with your eyes, your skin, or  
your clothing.  
Installation location  
The battery is located under the floor-  
mat in the luggage compartment.  
1 Read and comply with the warning  
information on page 167.  
2 Lift the floormat.  
In order to protect the battery  
case from ultraviolet radiation,  
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.  
do not place it in direct sunlight.  
A discharged battery can freeze. Store  
the battery in areas where temperature  
remains above freezing.  
3 Press the small cover gently. Lift the  
cover (arrow 1).  
4 Disconnect the battery cable from the  
negative terminal.  
Do not allow children access to  
batteries and battery acid.  
5 Loosen the three screws (arrows) and  
remove the cover.  
 
Battery  
167n  
When removing the battery, disconnect  
the cable on the negative terminal first,  
then the cable on the positive terminal.  
When installing a battery, connect the  
positive terminal first, then connect the  
negative terminal.  
When installing the battery, be  
sure that it is mounted securely in  
the battery well and that the cover is  
installed. If the battery is not mounted  
and fastened properly, it will not be  
adequately secured in case of an  
accident.<  
Charge condition  
Removal and installation  
You can read the charge condition  
of the battery with the "Magic Eye "  
(a hydrometer):  
Do not disconnect the battery  
when the engine is running. If  
you do so, the ensuing voltage surge  
will damage the vehicle's onboard  
electronics.  
> Green: adequate charge.  
> Black: not adequately charged. The  
battery has to be recharged. Please  
contact your BMW center for addi-  
tional information.  
Do not alter the positive terminal wiring  
in any way. If you do so, the Battery  
Safety Terminal's safety function will no  
longer be guaranteed. Repair and dis-  
posal must be performed by trained  
technicians only.<  
> Yellow: replace the battery.  
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.<  
 
168nBattery  
Fuses  
Avoid environmental pollution  
when disposing of old batteries.<  
Charging the battery  
Charge the battery in the vehicle only  
when the engine is not running.  
Return used batteries to a recy-  
cling point or your BMW center.  
Before doing any work on the  
electrical system, be sure to dis-  
connect the cable from the battery's  
negative terminal. Failure to do so  
could result in short-circuits, a fire or  
personal injury.<  
Maintain the battery in an upright posi-  
tion for transport and storage. Secure  
the battery against tilting in transit.<  
If the vehicle is to be parked longer  
than four weeks, disconnect the battery  
from the vehicle's electrical system by  
disconnecting the negative terminal  
cable and then recharge using a suit-  
able charging device.  
If an electrical accessory should fail,  
switch it off and check the fuse.  
In the glove compartment  
1 Open the glove compartment and  
turn the two white quick-release  
knobs to the left. Spare fuses and  
plastic tweezers are located on the  
fuse holder.  
If you intend to store your vehicle for  
longer than twelve weeks: remove the  
battery, charge it and store it in a cool  
(but frost-and dust-free) room. Every  
three months and before reinstalling the  
battery, have it recharged. If it is not  
recharged, it will not be serviceable.  
Every time the battery is discharged,  
especially over extended periods, its  
service life is reduced.  
2 Use the plastic tweezers to remove  
the fuse for the accessory or equip-  
ment that has stopped working.  
3 If the fuse is burned through (the  
metal strip will have melted and  
separated), replace it with a new  
fuse of the same ampere rating  
(color code).