Front Passenger Airbag Unit

Front Passenger Airbag Unit

The general safety precautions for working on airbag, belt tensioner and battery cut-out units (pyrotechnic components) must be observed. Refer to => [ Airbag, Belt Tensioner and Battery Cut-Out Units General Safety Precautions ] Airbag, Belt Tensioner and Battery Cut-Out Units General Safety Precautions.

Observe the special information regarding driver and front passenger airbags. Refer to => [ Airbag, Belt Tensioner and Battery Cut-Out Units General Safety Precautions ] Airbag, Belt Tensioner and Battery Cut-Out Units General Safety Precautions.

- Disconnect the battery.

- Remove the glove compartment. Refer to => [ Glove Compartment ] Glove Compartment.

Electrostatic discharges can lead to an unintended deployment of the airbag. Therefore, mechanic must electrostatic discharge him-/herself before disconnecting harness connector. This is done, for example, by briefly touching the chassis or door striker pin.






- Disconnect the wiring harness - 1 - from the front passenger airbag unit.

Vehicles with Dual Stage Airbag Units

- Disconnect the wiring harness - 2 - from the front passenger airbag unit.

Procedure for All Vehicles

- Remove the clip - arrow - from the mount - 3 -.

- Remove the screws - 2 - from the bracket - 3 - (9 Nm).






- Remove the bolts - 3 - (9 Nm) and the front passenger airbag unit - 4 - from the frame - 1 -.

• Clip the front passenger side airbag unit mount - 2 - to the frame - 1 -.

- Unclip the bracket - 2 - and remove it from the frame - 1 -.

Installation

- Install in reverse order of removal.

• If the housing for the front passenger airbag unit - 4 - is plastic, then use locking compound D 197 300 A2 when installing the screws - 3 - (9 Nm).






Check whether an additional ground cable must be routed in vehicle:

If a passenger airbag is replaced, an additional ground cable must be routed in the vehicle in some cases.

• The example shows a single-stage airbag unit. For dual-stage airbag modules, the evaluation as to whether an additional ground cable must be routed in the vehicle is done similarly.






- Check whether a ground cable is routed on the passenger airbag housing:

• With a passenger airbag with ground line - 1 -, the wiring harness - 2 - is a three-conductor harness, and in addition, another cable - 3 - is secured on the threaded pins - 4 -.

• With a passenger airbag without ground line - 5 -, the wiring harness - 6 - is a two-connector harness and no additional cable is secured on the threaded pins - 7 -.

If front passenger airbag does not have a ground wire, then route an additional ground wire inside vehicle:

• For the following procedure, use a cable (cross section 1 mm, length 600 mm) from the Wiring Harness Repair Set (VAS 1978) or Wiring Harness Repair Set (VAS 1978A).






- Secure end of ground line with bolt - 1 - on right side of passenger airbag.

- Route ground line correctly to right side of passenger footwell.

• If necessary, lengthen the ground cable with suitable instruments from the Wiring Harness Repair Set (VAS 1978) or Wiring Harness Repair Set (VAS 1978A).

- Attach the other end of the ground cable to the ground pin - 2 -.

- Turn on the ignition.

Make sure no one is in the vehicle.

- Connect the battery.