Here is just a quick write-up on how to replace the battery in the key fob. The only tool you need is a small flat head screwdriver.
First you can use the small flat head in this small tab to pull the fob into two pieces.

It should look like this after getting it apart.

Then taking the part with the buttons on it you will see a spot to use the flat head to start to work your way around to make that come apart into 2 pieces.

Once thats in two pieces you will see a small screw on the circuit board in the top left corner in the pic. The small flat head will allow you to unscrew this.

Then you will be able to pull the circuit board out and will allow you access to the battery.

Now you just use the flat head again to help pull the battery out and replace.

Once the new battery is in its just a matter of screwing the circuit board back in and everything else will just click back together. Now you have a fresh battery. You shouldn't have to reprogram the keyfob it should just start working again if the battery was dead so just click the buttons to test.
Hope this helps some people out.

 

I might add...touch ONLY the edges of the battery, otherwise, you could contaminate it.

 

Good job Vance.

I'm going to add a link in the FAQs, this is a much better explanation than the handbook IIRC.

 

Good point. I've had alot of experiences lately with keyfobs as both of my wifes stopped working on her Pontiac. Ended up having to resolder some stuff on the board that had somehow came off. Spent alot of time trying to figure out my Audi one also. Did a write up for the Audi battery too. Never got the Audi one to work though it most likely needed a reprogram but sold it before I had a chance to do it.

 

Thanks. Helps visualize it too. I do so much better having instructions with pictures. LOL.

 

That's a useful write up , thanks for that

 

If your "key transponder" still does not respond after installing a fresh battery, it may require reprograming or a new FOB. Jag wanted $400 for a new FOB and programing. I founld a new , in the bag, genuine Jag FOB for $22.00 on Ebay and my independent Jag tech reprogramed it when I had a transmission service.

 

Thanks for that very informative write up!! My battery is getting weak and will need to be replaced soon.

Anybody know where to buy one of these batteries OTHER THAN from a dealer? Batteries Plus maybe?

Thanks.

 

ebay. Very cheap.

 

Thanks Vance...one for the FAQ's again

 

You can get batteries for them anywhere. Its a common watch style battery. Like jagv8 said ebay. Or Walmart, Walgreens, etc, etc. Just ask for the CR2032 cause they arent also with the AA's AAA's, sometimes they are with the watch or hearing aid batteries. The last set I bought since its the same as my wife's Pontiac's keyfob was at Walmart.

 

Great write up! I did this process and it is exactly as described.

I went to the dealer and asked the service guy about replacing the battery. He told me I needed to do a diagnostic for $135. Then likely the key fob is bad t=and that will cost another $150. What a jerk!

 

Thanks, this helps out a lot, although I have to say I much prefer the FOB for my Harley. On twist with a coin, screwdriver, what have you, and the battery is laid bare.

 

This was easy to do, thanks for your help. Just need to test it, and good to go

 

tested, works just fine. Thanks

 

I believe the CR 2032 is a very common battery used in many key fobs and other applications. They are universally available.

 

Yup - you can find this battery literally anywhere. I last bought one at a drug store. Also, good write-up on how to replace the battery. Jaguar's design for the key fob is hilarious - disassemble the fiddly plastic pieces (being careful not to crack or deform the pieces), undo teeny screw to remove the printed circuit - only then can you get to the battery, and then you reassemble all the fiddly pieces. Someone must have been out sick the day of the class on engineering simplicity. I also have a same vintage BMW 335i, whose key fob battery went at the same time: 5 seconds to pop off the back cover and directly access the battery for replacement.

 

Ford?

 

I wish I found this "tutorial" helpful but just like the owners manual it does not EXPLICITLY show how to disassemble the portion with the battery in it.

I can see a couple spots to place a screwdriver in and try to separate what I think (?) is another two halves but it won't budge and in which direction?

So before I break the thing could someone show a photo of EXACTLY how to do that?

At least I know which batteries to order now.

THanks.

 

I did mine before this write-up and it was so obvious that I had no problems.

I'm not even sure I followed the handbook other than maybe a quick glance.