Audi Avant & Passat Models
The Audi Avant and Passat models use a roof-mounted antenna, which is threaded into an antenna base. To remove the antenna, rotate the antenna mast counterclockwise to remove. To remove the antenna base;
- Remove the rear trim as necessary to allow access via the rear portion of the headliner.
- Disconnect the antenna lead and if amplified, the wiring.
- Using a 22mm ( 7 / 8 inch) short open-end wrench, loosen and remove the base mounting nut, then remove the base and if installed, the seal.
- Installation is in reverse order of removal.
The A4 Sedan models have incorporated the antenna into the rear glass assembly. The antenna is not replaceable separately. The antenna amplifier is located underneath the left side D-pillar trim.