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The video above shows you how to replace the battery in your 2004 Audi A6. We recommend changing the battery in Audis every 4 years. Although some batteries last much longer, most batteries begin breaking down chemically after four years, so you could experience dimmer headlights and other negative effects before you have a dead battery in your A6 that you need to replace.
Replacing the battery in your A6 involves removing the terminals. When you reconnect the terminals, your radio presets are likely to be cleared out. In some A6s, you may need to re-enter a security code to get your radio to work again. Check for this code in your owners manual - it will usually be either a sticker or small card in the booklet. If you can't find it, call Audi and they will give you the code for free. In many Audis, the transmission "learns" how you drive over time and makes adjustments, so you may experience altered driving dynamics as your car re-learns your driving style after changing the battery.
Help keep your car as responsive as you are by maintaining proper power steering fluid levels2004 Audi A6 3.0L V6
Power steering fluid is easy to check and many people (mechanics included) often forget about - learn how here2004 Audi A6 3.0L V6
Burnt out brake lights increase your chance of getting rear ended - check and change yours today2004 Audi A6 3.0L V6
If you have an electrical component that doesn't work, try replacing the fuse first2004 Audi A6 3.0L V6
Don't be the guy with your third brake light burnt out2004 Audi A6 3.0L V6
Odd electrical problems that come out of nowhere can often signify a blown engine fuse - check and change yours here!2004 Audi A6 3.0L V6