A4 Mk3
| Components used |
| Component | Remarks |
| -H- | |
| Airbag coil connector and return ring with slip ring -F138- | |
| Steering column electronics control unit -J527- | Addressable via diagnostic address 16. |
| Onboard supply control unit -J519- | Addressable via diagnostic address 09. |
| Horn relay -J413- | |
| Treble horn -H2- | |
| Bass horn -H7- |