Technical information

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Safety battery terminal
The safety battery terminal is fitted on the battery's positive terminal.
The ignition squib of the safety battery terminal must not be crushed, cut through or heated!
The safety battery terminal disconnects only the positive battery cable between the battery and starter
motor/alternator.
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Identification
No identification
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Function
In order to minimise the risk of shorting following an accident, the vehicle electrical system in BMW vehicles is divided
into two circuits: the vehicle electrical system power supply section and the starter circuit.
If the key criteria are satisfied during an accident, the airbag control unit and/or one of the satellites transmits the
command to activate the propellant charge in the safety battery terminal. The gas volume this produces slides the cable
pin out of the battery terminal bracket, thereby disconnecting the plug connection between the battery and starter
motor/alternator.
The other consumers continue to be supplied with voltage by their own connection to the battery (vehicle electrical
system power supply section).
The entire triggering process lasts approximately 3 milliseconds.
Disconnecting batteries
When disconnecting batteries the following must be complied with:
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Switch off ignition.
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Firstly disconnect the negative terminal, then the positive terminal.
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If two batteries are installed, always disconnect both batteries.
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Note: Mechanical belt tensioners cannot be deactivated by disconnecting the battery.
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Note: If the vehicle cannot be de-energised:
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Do not remain in the area in which the triggered airbag may unfold and do not place material in this area if
heavy emergency equipment is being used.
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Wherever possible, treat casualties from the side.
High-voltage battery
High-voltage batteries have a voltage of 60 V to 1000 V.
For detailed information on each vehicle see emergency services cards.
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Active hybrid 7 F04, F01, F02, see 7 Series Saloon emergency services card
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Active hybrid 5 F10, see 5 Series Saloon emergency services card
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Active hybrid 5 F18PHEV, see 5 Series Saloon emergency services card
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Active hybrid 3 F30, see 3 Series Saloon emergency services card
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X5 ActiveHybrid F15PHEV, see SAV X5 emergency services card.
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X6 ActiveHybrid E72, see SAV X6 emergency services card.
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