Audi RS 4 Key Fob Battery Replacement (2007 - 2009) 

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How to replace the battery in this key fob for the Audi RS 4 2007, 2008, 2009 models.
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I once had to change my own key fob battery and discovered there was no central resource on key fob batteries. So, I created the FobBattery website. Check out our website for photos, free guides, and a current list of brands we have built out a database of batteries and fobs for. fobbattery.com/