Audi A4. Body repair manual - part 17
Airbags, servicing
Removing
WARNING!
Follow all safety precautions when working on
airbags page 69-40 .
- Unbolt airbag unit using Torx wrench (T30).
- Disconnect harness connector - 2 -.
- Place airbag unit on appropriate surface with
impact padding facing up.
Installing
- Make sure harness connector - 2 - audibly
engages (clicks).
- Install airbag unit and tighten to 7 Nm (62 in. lb).
WARNING!
Make sure no one is in vehicle.
- Switch ignition on and connect battery Ground
(GND) strap.
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Airbags, servicing
Sport steering wheel, removing and
installing
Removing
- Remove bolt - 4 - .
Installing
- Center steering wheel (wheels straight).
- Replace bolt - 4 - and tighten to 60 Nm (44 ft lb).
- Install airbag unit
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Airbags, servicing
Spiral spring ( m.y. 1998), removing and
installing
WARNING!
Follow all safety precautions when working on
airbags page 69-40 .
- Disconnect battery Ground (GND) strap.
- Wheels must be facing straight ahead.
- Remove airbag unit page 69-53 .
- Remove steering wheel.
Repair Manual, Suspension, Wheels, Steering,
Repair Group 48
- Remove bolts -5- (4x) from carrier unit -6-.
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Airbags, servicing
- Remove bolts -7- (4x) from spiral spring -8-.
WARNING!
Steering wheel and spiral spring can only be
removed with the wheel straight-ahead. Do not
rotate spiral spring after it is removed.
Notes:
Even if spiral spring has been turned, determine
center position.
From the center position, the spiral spring
should rotate approx. 3 1/2 revolutions in both
directions.
1 - Airbag unit
2 - Harness connector for airbag and horn
3 - Mounting bolt for steering wheel
4 - Harness connector for horn
5 - Bolt (4x)
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Airbags, servicing
6 - Carrier unit
7 - Bolt (4x)
8 - Spiral spring
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Airbags, servicing
Sport steering wheel spiral spring ( m.y.
1998), removing and installing
Notes:
Wheels must be facing straight ahead.
Before removing spiral spring, remove airbag
unit and steering wheel.
- Remove bolts -1- (3x).
- Tightening torque: 5 Nm (44 in. lb)
- Remove carrier unit. Disconnect harness
connectors.
- Remove bolts -5- (3x).
- Tightening torque: 5 Nm (44 in. lb)
- Remove lower part of carrier unit. Disconnect
harness connectors.
- Remove bolts securing spiral spring.
- Pull spiral spring downward and remove. Do not
rotate spiral spring while it is removed.
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Airbags, servicing
Spiral spring, removing and installing
Driver-side airbag unit and steering wheel
removed
- Pull steering column all the way out and down.
- Remove bolt -1- (2x).
Tightening torque: 2.8 Nm (25 in. lb)
- Remove handle -2-.
- Remove two Phillips-head screws (arrows).
Tightening torque: 0.6 Nm (5 in. lb)
- Remove upper section of steering column switch -1-.
To install, insert upper shell into retaining tab in lower shell, swing down
and install screws.
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Airbags, servicing
- Remove bolts -2- (2x).
Tightening torque: 0.6 Nm (5 in. lb)
- Remove hex bolt -1-.
Tightening torque: 0.6 Nm (5 in. lb)
- Remove lower trim for steering wheel switch -3-.
- Disconnect harness connector -1-.
- Release retaining tab (arrows) and pull spiral spring from steering
wheel switch.
Notes:
Wheels must be in straight-ahead position when removing or installing
spiral spring.
A new spiral spring is secured in the centered position using a tie
wrap.
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Airbags, servicing
Passenger-side airbag unit, removing and
installing
1 - Passenger-side airbag unit
WARNING!
Follow all safety precautions when working on
airbags page 69-40 .
Removing:
- Disconnect battery Ground (GND) strap.
Remove passenger-side knee bolster
page 68-1 .
- Disconnect harness connector (tunnel
connection to rear and left of airbag unit)
Fig. 1 .
WARNING!
Do NOT disconnect red 2-pin harness
connector on side airbag unit under any
circumstances.
- First, disconnect both angle brackets -4-.
- Remove both angle brackets -3-.
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Airbags, servicing
- Remove bolts -2- at passenger-side
airbag.
- Remove airbag unit.
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Airbags, servicing
- Place airbag unit on suitable surface with
impact padding facing up.
Note:
Always replace instrument panel after passenger-
side airbag has deployed.
Installing:
- Install airbag unit.
- Make sure harness connector -6- audibly
engages (clicks).
- Switch ignition on.
WARNING!
Make sure no one is in vehicle.
- Connect battery Ground (GND) strap.
2 - Bolts (2x)
Always replace after airbag has deployed
12 Nm (9 ft lb)
3 - Support
Always replace after airbag has deployed
4 - Angle bracket
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Airbags, servicing
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Airbags, servicing
Fig. 1
Disconnecting airbag harness connector
- Using screwdriver, push harness connector -1- for passenger-side
airbag over retaining tab -2- and disconnect harness connector in
direction of arrow -3-.
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