[For those just looking for the information, scroll down to see how to change it. The first few paragraphs are just introductory ramblings.] The last time I took my 2002 Volkswagen Passat to the dealer, one of the things I had them do was replace the battery in the key fob (the remote entry and alarm device). It cost me close to $50 to replace. When I asked the service guy what the deal was, he said that they had to reprogram it, and that’s what the fee was for. Obviously I though it was BS, but I let it go. However, the next time I needed the battery replaced I vowed that I would do it myself. [And by the way, I won't name the dealer that charged me the $50, but I do live in Dublin.]

Thankfully, the internet provides great DYI advice. The only problem was that there was no pictures associated with the advice I found. Hence this post.

But first, the usual disclaimers. This worked for me. If it doesn’t work for you, then you might have a different issue. I’m not a mechanic, nor do I claim to be one. And the advice is provided “AS IS”.

Okay, on with the show.

Battery Needed

Obviously you’ll need a replacement battery. I picked mine up at Walgreens for $3.99. You’ll need a 3 Volt “CR 2032″, which is a tad bit smaller than a Nickel.

How to Open the Volkswagen Key FOB

Here’s a picture of the key with the key blade folded in. You’ll need to flick the key out to do the job.

Once it’s flicked open, look for a slot in which you can fit a flat head screwdriver in. My chubby finger is pointing to the slot.

Insert the tip of the flathead screwdriver in the slot and twist to pry open.

Pull the two halves apart.

Next pull apart the half with the buttons. You’ll have to grip the sides of the two halves and gently pull. Once slightly open, I used the screwdriver to assist with prying open. You’ll see the battery in one of the halves.

After you replaced the battery, snap all the pieces back together. This saved me about $45 doing it myself. And I did not have to reprogram the key fob.