Passenger Airbag Unit

Passenger Airbag Unit

Removing


• Always read the General Safety Precautions before working on airbags, belt tensioners and battery cut-out units (pyrotechnical components). Refer to => [ Airbag, Belt Tensioner and Battery Cut-Out Units, General Safety Precautions ] Airbag, Belt Tensioner and Battery Cut-Out Units, General Safety Precautions.

• Note the special instructions for the driver and passenger airbags. Refer to => [ Driver and Passenger Airbag, Special Notes ] Driver and Passenger Airbag, Special Notes.

- Disconnect the battery.

- Remove side instrument panel cover. Refer to => [ Instrument Panel Side Covers ] Instrument Panel Side Covers

- Remove center cover.

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


Electrostatic discharges can lead to unintended deployment of the airbag. Therefore, the technician must discharge static electricity from the body before disconnecting the ignition and ground wiring. This is done, for example, by briefly touching the vehicle body or the door striker pin.

- Disconnect wiring harness from front passenger side airbag.

- Remove the two bolts - 1 - (9 Nm).

- Remove the two bolts - 2 - and - 3 - (9 Nm).

- Remove front passenger's airbag and brackets - 4 - and - 5 - from mounts.






Installation

- Install in reverse order of removal.

• If the passenger airbag housing is made of plastic, then use locking compound D 197 300 A2 to install the bolts - 2 - and - 3 - (9 Nm).






Check whether an additional ground cable must be routed in the 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 module. 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 wire 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 -.






On a passenger airbag without ground wire, route an additional ground wire in vehicle:

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

• Lengthen the ground cable as needed with suitable instruments from the Wiring Harness Repair Kit (VAS 1978) or Wiring Harness Repair Kit (VAS 1978A).

- Secure other end of ground cable to ground pin - 2 -.






- Switch on ignition.


Make sure no one is in the vehicle.

- Connect the battery.