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Removing and installing curtain airbag (Avant) > < Servicing curtain airbags

A4 Mk2

Removing and installing curtain airbag (saloon)
Removing and installing curtain airbag (saloon)
Special tools and workshop equipment required
t  Vehicle diagnostic tester
   
t  Torque wrench -V.A.G 1783-
  W00-0990
  WARNING
Observe safety regulations for pyrotechnic components → Chapter.
  Note
t  There are two curtain airbag versions. Both versions are described in the following. Determine the version fitted in the vehicle concerned and perform the relevant work steps.
t  Version 1 → Anchor
t  Version 2 → Anchor
Version 1
1 - Curtain airbag
t  Removing:
–  Disconnect battery earth strap → Electrical system; Rep. gr.27.
–  Remove sun visor → Chapter.
–  Remove A-pillar trim (top) → Chapter.
–  Remove B-pillar trim (top) → Chapter.
–  Remove roof end trim → Chapter.
–  Remove D-pillar trim → Chapter.
–  Unplug connectors → Fig.
–  Slacken off the three bolts -4-.
–  Slacken off the six bolts -5-.
–  Slacken off bolt -7-.
–  Take the three retainers -2- out of roof frame.
–  Set down front section of curtain airbag unit on seats.
–  Slacken off the two bolts -6-.
–  Take curtain airbag -1- out of vehicle.
t  Installing:
  WARNING
Observe safety regulations for pyrotechnic components → Chapter.
  Caution
Always observe correct sequence for installing curtain airbag.
–  Insert centre retainer -2-.
–  Insert remaining retainers -2-.
–  Screw in the two bolts -6-.
–  Tighten bolt -7-.
–  Use two bolts -5- to attach airbag unit to B-pillar → Fig.
–  Secure the three retainers -2- with three bolts -5-.
–  Screw in last bolt -5-.
–  Screw in outer bolts -4-.
–  Screw in centre bolt -4-.
Perform remaining installation in reverse order of removal. Observe the following:
–  Switch on ignition.
  WARNING
Make sure nobody is in the vehicle when the battery is being connected.
–  Connect battery earth strap → Electrical system; Rep. gr.27.
  Note
t  Observe measures to be taken after connecting the battery → Electrical system; Rep. gr.27.
t  If the airbag warning lamp -K75- indicates a fault following installation, you must interrogate, erase and then re-interrogate the event memory → Vehicle diagnostic tester.
2 - Retainers (5x)
3 - Tab
4 - Bolts (3x)
q   Tightening torque: 4 Nm
q   Self-locking
q   Always renew after removing
q   Always clean threaded holes for bolts (using a tap for example)
5 - Bolts (6x)
q   Tightening torque: 4 Nm
q   Self-locking
q   Always renew after removing
q   Always clean threaded holes for bolts (using a tap for example)
6 - Bolt (2x)
q   Tightening torque: 4 Nm
q   Self-locking
q   Always renew after removing
q   Always clean threaded holes for bolts (using a tap for example)
7 - Bolt
q   Tightening torque: 4 Nm
q   Self-locking
q   Always renew after removing
q   Always clean threaded holes for bolts (using a tap for example)
8 - Connector for curtain airbag
9 - Gas generator

   
Attaching curtain airbag to B-pillar
1 - Curtain airbag
–  Screw in bolts -5-.
Tightening torque: 4 Nm
  A69-0276
Unplugging connector for curtain airbag
–  Press release mechanism -A- and unplug connector in direction of arrow.
1 - Retainer for connector
Version 2
  WARNING
Observe safety regulations for pyrotechnic components → Chapter.
  A69-0182
1 - Bolt (10x)
q   Tightening torque: 4 Nm
q   Self-locking
q   Always renew after removing
q   Always clean threaded holes for bolts (using a tap for example)
2 - Cap nut
q   Tightening torque → Current flow diagrams, Electrical fault finding and Fitting locations
3 - Retainers (2x)
4 - Bolt (1x)
q   Tightening torque: 4 Nm
q   Self-locking
q   Always renew after removing
q   Always clean threaded holes for bolts (using a tap for example)
5 - Retainer (1x)

t  Removing:
–  Disconnect battery earth strap → Electrical system; Rep. gr.27.
   

–  Remove sun visor → Chapter.
–  Remove A-pillar trim (top) → Chapter.
–  Remove B-pillar trim (top) → Chapter.
–  Remove roof end trim → Chapter.
–  Remove D-pillar trim → Chapter.
–  Unplug connector at curtain airbag → Fig.
–  Remove bolt -4-.
–  Unscrew bolts (2x) -1- in area surrounding gas generator.
–  Unfasten cap nut -2- in area surrounding gas generator.
–  Unscrew bolts -1-.
–  Unclip retainers -3- and remaining retainers except for retainer -5- from roof frame.
–  Unscrew cap nut -2- in area surrounding gas generator.
–  Holding curtain airbag firmly, unclip retainer -5- from roof frame and take curtain airbag out of vehicle.
   
Unplugging connector for curtain airbag
t  Unplugging:
–  Use small screwdriver to release connector locking element -3-.
–  Unplug connector -1- from detonator -2-.
t  Installing:
  WARNING
Observe safety regulations for pyrotechnic components → Chapter.
  WARNING
Always observe correct sequence for installing curtain airbag.
–  Clip retainer -5- into roof frame.
  A69-10068

–  Engage curtain airbag at stud -2- and hand-tighten nut.
–  Clip in retainers -3- and remaining retainers.
–  Tighten bolt -1- at retainer -5- → Item.
–  Tighten remaining bolts -1- → Item.
–  Tighten bolt -4- → Item.
–  Tighten nut -2- → Item.
Remaining installation is carried out in reverse order of removal; note the following:
–  Switch on ignition.
  WARNING
Make sure nobody is in the vehicle when the battery is being connected.
–  Connect battery earth strap → Electrical system; Rep. gr.27.
  Note
t  Observe measures to be taken after connecting the battery → Electrical system; Rep. gr.27.
t  If the airbag warning lamp -K75- indicates a fault following installation, you must interrogate, erase and then re-interrogate the event memory → Vehicle diagnostic tester.
   

Removing and installing curtain airbag (Avant) > < Servicing curtain airbags