How to change the battery in a Peugeot/Citroen key fob (2-button)

When your car key battery starts to fail, your garage will be happy to offer to replace the battery for a fee. Mine quoted me ?25 (circa $30) for this insanely simple task? crazy!

I thought I?d do a quick guide for others who may be cautious of just diving in with a screwdriver!

I?ve demonstrated this on my Peugeot 206 key, though the same key is used on many Peugeot and Citro?n models

Peugeot models (106, 206, 306, 406 as well as the 107, 207, 307, 407? I believe)
Citro?n models (Xara Picasso, Saxo, Xantia, Berlingo?).

  • 1. Remove the single screw on the key fob with a cross head screwdriver
  • 2. Twist a flat headed screwdriver in the gap between the two halves of the fob (top end of the key)
  • 3. Pull the two halves of the key fob apart by hand
  • 4. Make a note of the way around the battery sits in its metal cradle. It is likely to have the positive terminal facing upwards
  • 5. Use a small screw driver to push the flat style battery out of its cradle (being careful not to damage the electronics in the process!)
  • 6. Replace the battery with a new one (I believe these all use a CR2016 battery), ensuring it is the same way around as the previous battery
  • 7. Push the two halves of the key back together until they “click” shut
  • 8. Replace the single screw to secure the two halves
  • 9. Test the key on the car… all should now be resolved!


I'm passionate about technology, and particularly helping people make the most of it. I've spent the last 30 years helping others make the most of technology. My career started in IBM, but I choose to move into smaller business environments, to use a breadth of skills, and help businesses step change their IT services. My skills range from user based technology, through business systems (applications) to infrastructure. I also have a long background in IT security. I focus on what I consider to be "productive technology", i.e. adding genuine value to peoples lives. I'm not a big gamer, and don't hold much interest in what I consider to be disposable consumer technologies. During the day, you'll find me consulting with businesses or heading up an IT department. At the weekend, you'll find me sat at my Linux PC, writing PHP or Python code, or trying to help others on Twitter, this blog, or my YouTube channel: Artexic.