A4 Cabriolet L4-1.8L Turbo (AMB) (2005)
Repairs and Inspections Required After a Collision: Service and Repair
Air Bag System
Airbag Units After Accident, Replacing
NOTE:
The control unit for the airbag can be used for up to three side/head airbag and/or belt tensioner deployments.
The malfunction display "Control unit defective" will appear after third deployment.
Airbag control unit must be replaced:
-
If driver/passenger airbag is deployed.
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After three side and/or head airbag deployments
-
If housing is damaged.
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In the event of tunnel deformation within 200 mm radius of control unit.
Always exchange the following:
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All triggered airbag units.
Additionally, if passenger's airbag has been triggered:
-
Instrument panel
-
Supports for passenger's airbag module which have been bent out of shape (must not be bent back into shape).
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Both front airbag sensors on front end.
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Lateral acceleration sensor if floor pan around sensor has been deformed.
Additionally, if driver's airbag has been triggered:
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Self-cancelling ring with slip ring.
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Both front airbag sensors on front end.
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Lateral acceleration sensor if floor pan around sensor has been deformed.
Additionally, if side airbag has been triggered:
-
Lateral acceleration sensor on side where airbag has been triggered.
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With folding backrests: Side padding.
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Non-triggered lateral acceleration sensor if floor pan around sensor has been deformed.
Additionally, if head airbag has been triggered:
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Lateral acceleration sensor on side where airbag has been triggered.
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A-pillar, B-pillar, C-pillar, D-pillar trim.
-
Non-triggered lateral acceleration sensor if floor pan around sensor has been deformed.
Additionally:
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All seat belts with triggered belt tensioners
A -
with triggered airbag control unit:
-
Connect vehicle diagnostic, testing and information system VAS 5051 and select vehicle system "15 - Airbag". For this purpose, the ignition must
be switched on.
Front belt tensioner:
-
Read measured value block, display group 001
A triggered belt tensioner is indicated by the display "too great".
Rear belt tensioner (USA):
-
Read measured value block, display group 002
A triggered belt tensioner is indicated by the display "too great".
B -
with triggered airbag control unit:
-
Connect vehicle diagnostic, testing and information system VAS 5051 and select vehicle system "15 - Airbag". For this purpose, the ignition must