How to replace remote fob battery in Audi A3, A4, Q3, Q7, R8, TT

December 22, 2017 in Audi A3, Audi A3 8P (2003 to 2013), Audi A3 8V (2012 to 2018), Audi A4, Audi A4 B7 (2004 to 2008), Audi A6, Audi Q3, Audi Q7, Audi R8, Audi TT by admin

This tutorial explains how to replace the key fob battery in Audi A3 8P, 8V (2003 – 2018), Audi A4 B7 (2004 – 2009), Audi A6 C6 (2004 – 2011), Audi Q3 8U (2011 – 2018), Audi Q7 1st. Gen. 4L (2005 – 2015), Audi R8 I (2005 – 2015), Audi TT 8J (2006 – 2015) with key fob pictured below.

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

– If you press a button quickly, the LED blinks once.
– If you press a button longer (convenience opening), the LED blinks several times.
– If the LED does not blink, the remote control key battery is dead. The message “Please change key battery” can also appear in the instrument cluster display. Replace the 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 (red arrow).

Step 2: Pry apart the base (A) and the cover (B) carefully with a coin. Remove the cover (arrow).

Step 3: Re-install battery. Slide the battery holder carefully into th e remote
control key. Insert the mechanical key.

Battery orientation is with the (+) side down in relation to the cover.

The instructions in this tutorial will work in the following model years:
– Audi A3 8P, 8V 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 and 2018
– Audi A4 B7 2004, 2005, 2006, 2007, 2008 and 2009
– Audi A6 C6 2004, 2005, 2006, 2007, 2008, 2009, 2010 and 2011
– Audi Q3 8U 2011, 2012, 2013, 2014, 2015, 2016 and 2017
– Audi Q7 1st. Gen. 4L 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014 and 2015
– Audi R8 I 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014 and 2015
– Audi TT 8J 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014 and 2015