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How to Replace the Key Fob Battery in an Audi A4?

Model: Audi A4 B7 - Years: 2004, 2005, 2006, 2007, 2008
Part: Key

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Video tutorial

To replace the key fob battery in an Audi A4, use a tool to pry open the back cover of the device. Underneath, you will find the battery, which can be removed from its housing and replaced with a new replacement part.

Once the new battery is inserted into the device, close it by repositioning the back panel. After the replacement, check that the device functions correctly.


Updated on 18 September 2026 by ScegliAuto


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To reset the AdBlue system on a 2018 Peugeot Boxer, follow these steps: Start the engine and ensure the vehicle is parked in a well-ventilated area. Locate the "MENU" button on the dashboard or steering wheel controls. Press and hold the "MENU" button until the menu options appear on the display. Use the arrow buttons or scroll wheel to access the "Vehicle Settings" or "Settings" menu. Select the "AdBlue" or "AdBlue System" option. Look for the "Recharge" or "Reset" option in the AdBlue menu. Once you find the reset option, select it and confirm your choice when prompted. The system will be reset, and a confirmation message may appear on the display. Turn off the engine and wait a few seconds. Restart the engine and check that the AdBlue system has been reset.

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by ScegliAuto

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