1 Series E81 130i (N52K) 3-door
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Instructions for disconnecting and connecting battery
Observe safety instructions for handling vehicle battery.
Before disconnecting battery:
Turn off the ignition and other electrical loads/consumers to prevent sparking when reconnecting.
If the ignition is not turned off when the battery is disconnected, fault memories may be set in some control
There is a danger of mixing up battery leads: If the battery positive and negative leads are the same
colour and you are in doubt, follow the polarity to the battery, then mark and cover the leads.
On vehicles with radio code: After disconnecting the battery, the radio code must be re-entered. Therefore
obtain the radio code card from the customer beforehand. Note stored stations and restore them after
connecting the battery.
Stored settings of the on-board computer and clock will also be lost.
All available central keys must be recoded for cars with first generation infrared transmitter locking
General notes on disconnecting battery:
Do not disconnect battery leads and leads from alternator and starter motor while engine is running.
Cars with IBS on battery negative terminal:
Do not under any circumstances pull/lever off pole shoes by force.
Do not under any circumstances release socket-head cap screw of IBS.
Detach terminal of battery negative lead from car battery and second battery if fitted. Cover battery negative
terminal(s) and secure.
When work is carried out on the electrical system, faults may be caused in the fault memories of some control
units when the battery is connected.
When installing battery terminal: Tightening torque 61 21 1AZ
After connecting battery:
The scope of application of some systems may be restricted after a power supply interruption.
Likewise, individual settings may be lost.
Settings or activations must be carried out, depending on the equipment specification.
Vehicles with automatic engine start-stop system (MSA):
MSA function is active only after learning period (vehicle must not be woken for a period of 6 hours) > if
necessary, notify customer of the situation
E46 (AWD)/ E53/ E83: Carry out steering angle sensor adjustment
RA Instructions for disconnecting and connecting battery
BMW AG - TIS
Issue status (12/2007) Valid only until next DVD is issued
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