So I am currently looking for an 02, 03, or 04 A4 and I had a few questions. 1. I know its the same bodystyle and everything I am looking for a 1.8t. My question is what is different about the car throughout these years? And 2. Is the stereo system bose as well? Thanks this will help me out alot

 

Edmunds should have the info on what changed from year to year. As for the sound system, the Bose system is an optional upgrade, the standard is the Audi Symphony.

 

Obviously by 04-05, B6's had the most amount of options. 6 speed available on 04.5+ and lowers were painted. Satallite radio also availabe in newer B6's. Sport suspension is a tad higher on 03's. Besides that, most B6's are exactly alike. The power output stayed the same throughout.