How to replace remote fob battery in Audi A8 (D3)

December 22, 2017 in Audi A8 by admin

This tutorial explains how to replace the key fob battery in Audi A8 D3 (2003 – 2010), with key fob pictured below.

LED in the remote control key (arrow in image on right side)

– Battery operation in the master key is monitored by a check light . The check light flashes when one of the buttons on the master key is pressed.
– If the check light does not flash, the battery is dead and has to be replaced .
– When the battery is dead the symbol appears in the instrument cluster display as well as the message: “Please change key battery”.

To replace remote fob battery you’ll need:

– new CR2032 3v battery (one battery)


In order to replace it, follow the steps:

Step 1: Press the release button (green arrow) to open key.

Step 2: Pry the cover (red arrow) with your fingers, as shown in image (A).

Step 3: You’ll now see the battery. Remove the old battery, making note of their orientation, and replace with new one.

Step 4: Re-install battery, and after it the key blade.

Battery orientation is with the (+) side up.

The instructions in this tutorial will work in the following model years:
– Audi A8 D3 2003, 2004, 2005, 2006, 2007, 2008, 2009 and 2010