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How to Replace the Key Battery on a Passat

Model: Volkswagen Passat B6, 3C - Years: 2005, 2006, 2007, 2008, 2009, 2010
Part: Key

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Video tutorial

In this guide, learn how to replace the battery in a Passat key. Take your key and extract the plastic key blade from the key fob by pressing the side button. Once the blade is removed, pull off the chrome cap. Using a screwdriver, lift the cover of the key to find the circuit board and battery inside.

Replace the worn battery with a new one (same size and voltage). Reassemble the key and insert the key blade back inside.

Test the key's functionality with the dedicated buttons.


Updated on 26 February 2026 by ScegliAuto


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How to open the bonnet on a Volkswagen Golf?

In this tutorial, you will see how to open the bonnet on a Volkswagen Golf MK4. This is a very simple operation that follows the standard procedure. First, open the driver's door, then locate the lever in the lower left area and pull it. Next, move to the front of the vehicle, lift the bonnet slightly, and find the second lever located just above the Volkswagen logo. At this point, simply pull it towards you, fully open the bonnet, and secure it with the prop rod. To close it, gently push it down.

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by ScegliAuto

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