Gather your materials. You will need a new CR2032 battery, a small flat-head screwdriver, and a piece of cloth.
Locate the key fob battery compartment. The key fob battery compartment is located on the back of the key fob. There is a small indentation in the plastic cover that you can press to release the cover.
Remove the battery cover. Gently pry the battery cover open using the flat-head screwdriver. Be careful not to damage the cover.
Remove the old battery. Once the battery cover is open, you will see the old battery. Use the flat-head screwdriver to carefully pry the battery out of its compartment.
Insert the new battery. Place the new battery into the compartment with the positive (+) side facing up.
Replace the battery cover. Replace the battery cover and press it firmly into place.
Test the key fob. Press the buttons on the key fob to make sure that they are working properly.
_That's it! You have now successfully replaced the battery in your 2001 Volkswagen Passat key fob._
