Hi

New guy here, any help will be appreciated.

Just purchased my 2013 allroad. Did pre purchase inspection on it at audi dealership. Everything OK accept this issue. When I switch to Sirius xm radio mmi is saying ; antenna " a technical issue has occurred see the dealer" . I guess the dealer run test and this is the code :
Radio (56-Radio(mmi 3g)) (4g0035082g 0133 Radio U SIRIU 4g0035082 h60)
2617 11 Satellite antenna ( open circuit static )
Dealer suggests to change roof fin antenna. I came across used antenna in my cars color . Should I buy it and is it hard to replace it ????

I have not subscribed for Sirius radio yet but planning soon (is it worth it for traffic info or does my navigation have traffic info) . This morning I tried Sirius preview channel 184 and seems to be working outside my garage but not in garage. My navigation seems to be working fine and hd radio. Do I really need new antenna ???
So any thoughts on this issue. Thanks in advance guys

Mirel