Only cars that came with OnStar came with a factory microphone location.
Some 2002-2005 US Audi A6’s have a Sirius XM antenna on the roof. This wire is connected to the tuner in the trunk. The SAA-SIR600 is made to connect to the factory Sirius XM antenna cable in the trunk on the left side.
All SiriusXM ready radios require this external tuner in order to listen to SirusXM.
All aftermarket radios with GPS or Wireless CarPlay/Android Auto come with an external GPS antenna.
All 2002-2005 Audi A6’s with a factory GPS radio have a factory GPS antenna that you can use with your aftermarket radio using this adapter.
If your 2002-2005 US A6 did not have factory navigation the antenna on the roof still may have a GPS antenna cable. The cable is on the drivers side behind the Sirius tuner.
You will need this extension cable to connect to this cable. And also the cable above to connect to the radio.
The Concert II radio needs 2 keys the rest of the radios need 4 keys to be removed.Â
These tools come in handy when removing the cars interior trim.
These are the radios we recommend for your car.