For the record. 4F0 B7 Key FOB does not work with a 2003+ B6

[Luxus Panzer]

I had a questionable battery when I was trying to adapt ti to my car, I will try again once I get a new battery and update this post. (my car is a 2004)

Here are the specs on the B7 key Fob in question...

[rollerton]

No...it will not.
Look for one with an 8E0 xxx part number ending in 'L' or 'R' . Those work great.
4F0 is a completely different chassis.

[Gosser]

By different chassis do you mean different Audi? I had that key, bought it off eBay, and it was listed as a B7, was the seller advertising incorrectly?

[diagnosticator]

By different chassis do you mean different Audi? I had that key, bought it off eBay, and it was listed as a B7, was the seller advertising incorrectly?

8E0 is a part designed for the B6/B7 A4.

4F0 is for a C6 A6.

However, sometimes parts designed for a certain chassis are used for other Audis also.

[f1torrents]

People often refer to that "style" of key as the B7 fob.
Although that is 100% a C6 A6 fob, and completely useless to anyone without the component security data from the car it came from.

[Gosser]

balls. Lesson learnt.