Do it yourself
Frequently asked questions about cars and motorcycles
Car tutorial (Do it yourself) Motorcycle tutorial (Do it yourself) Frequently Asked Questions

How to Change the Key Fob Battery for the Audi A4 B9

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

See other generations:
Video tutorial

If you own an Audi A4 B9 and the key fob suddenly stops working due to a dead battery, follow the steps below and apply them one by one. First, purchase a new CR2032 battery. Then, remove the emergency key from inside the fob cover and use it to easily pry out the battery holder.

Once done, take out the dead battery and replace it with the new one. Finally, reinsert the battery holder back into the fob cover along with the emergency key, and you're finished.


Posted on 6 September 2026 by ScegliAuto


Related tutorials

How to Replace the Key Battery in an Audi A4
How to Replace the Key Battery in an Audi A4
Audi A4 (2014-2024 / B9) 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 p…
How to Replace the Key Battery of an Audi A4?
How to Replace the Key Battery of an Audi A4?
Audi A4 (2004-2008 / B7) Start by pressing and holding the button on the top side of the key fob of your Audi A4, which will open the physical key. Then, using a flathead scr…
How to Replace the Key Battery of an Audi A4
How to Replace the Key Battery of an Audi A4
Audi A4 (2007-2016 / B8) Before you can begin, press the button located on the upper section of the key for your Audi A4 to extract and remove the physical key from inside th…

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.

Watch the video!


by ScegliAuto

More videos