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How to Change the Key Fob Battery of 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

How do you change the key fob battery of an Audi A4? Let's see in this video how to do it in detail. Take your key fob and press the button to release the metal key. Once extracted, use your fingers to grasp the two plastic tabs on the key fob cover, press, and pull the piece out of the cover.

Remove the worn battery from the housing, take a new one of the same size and voltage. Reinstall the plastic battery holder in the key fob cover, and finally insert the metal key back into the cover.

Check that the key fob works correctly.


Updated on 27 February 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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