It's easier to purchase a replacement sensor from a local tire shop. They are ~$50 ea. +install. They can perform the relearn procedure to match the vehicle, as well. Plus you get a warranty. I wouldn't trust ebay or amazon for stuff like this. The Chinese make a lot of fraudulent/inferior auto parts and flood the U.S. market. Technically, the TPMS sensors should "all" be replaced at ~7-8 years. That's about the life of the integrated batteries. In the owners manual, Toyota recommends replacing them when replacing your tires.