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How to Replace the Key Battery in an Audi A4

Model: Audi A4 B9 - Years: 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024
Part: Key

See other generations:
Video tutorial

Start by pressing and holding the button located on the back of the key fob for your Audi A4 to extract the physical key. Once you have removed the physical key, use a flathead screwdriver to pry off the back cover of the key fob. This will give you access to the dead battery inside.

Proceed to remove the battery from the key fob, and the disassembly will be complete.

To install the new battery and reassemble the key for your Audi A4, follow this procedure in reverse, and the replacement will be finished.


Updated on 29 April 2026 by ScegliAuto


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How to Reset the AdBlue Warning Light on a Peugeot Boxer

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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