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I've had about 12 years of soldering experience and I love ripping things apart and fixing them. Once the top layer of epoxy was scraped off this was a cakewalk to replace the battery. The Battery is a common 3 volt Lithium CR2477N. You can buy one at Digikey.com (LINK) Part Number "P030-ND". I then closed it up with Silicone which I let dry for a full 24 hours or until it got hard enough so that I can safely put it in the wheel with out worrying about the air in the wheel getting hot and softening the silicone. I would also recommend getting a box of #9 rubber washer and also a box of #8 to replace the one on the sensor. You can grab this washer for about 30 cents at home depot in plumbing section. What I did was slid the #9 onto the base of the sensor then a #8 over the #9 washer basically creating a pyramid of washers. Then I reinstalled the sensor. If you just put one washer on you might run into a small leak down the road as I did...then again you might not.
Finally reprogramming these things can be much simpler if you just used these Magnets that Supporting Vendor Jhonathan_W from our forums sell for $13.00 USD.
I added a link to the Digikey.com website direct to the battery you need in the main post and right here in this one. Enjoy! Also you can grab a #9 rubber washer from home depot in the plumbing section to replace the washer that goes between the sensor and the rim.
Excellent videos. My 98 TMS are still ticking, but I know that they will soon be in need of replacement and your video was great for reference. Thanks for sharing.
Another little gem I have to bookmark,,,,Thanks for producing and posting!!This is a GOOD ONE!!! When the time comes I figure it's worth a shot,, as the worst case I'd have to buy a new one anyhow!!