Audi 4.2-liter V8 FSI Manuel de réparation télécharger pdf (Page 20)

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Battery isolation igniter N253

The battery isolation igniter N253 disconnects the

vehicle battery from the starter and alternator in the

event of a collision.

Use is made of a pyrotechnic component, which is

activated by the airbag control unit J234 upon

deployment of the airbag in an accident of high

severity.

In the event of a rear collision, only the belt tensio-

ners and the battery isolation igniter are activated.

If the pyrotechnic propellant charge is ignited, the

resultant gas pressure displaces the bolt of a piston

and disconnects the two terminals.

After activation, the battery isolation igniter must

be replaced.

The battery isolation igniter N253 is located in the main fuse box directly on the battery in the boot of the

Audi A5.

Battery isolation igniter

Connecting

element with

terminals

Igniter

Bolt

Occupant Protection

Battery isolation igniter

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Robert gggg 25 Mar 2025 | 21:16:46

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Audi 4.2-liter V8 FSI Manuel de réparation Page 20