Get 2002 Audi A6 Key Fob Battery Sorry for the noob question, but dash is telling me my key fob battery needs replacing. Audi a4 b7 image credit to nico demattia of quattrodaily. 433MHz ID48 4D0837231A Remote Car Keyless Key Fob 3 Button ... from image.pushauction.com My switchblade fob ('98 a6 sedan) requires two (2) cr1620 batteries, which run to access the batteries, use a screwdriver to gently twist, not pry, the fob if the car is still under warranty, audi should replace the batteries.