2032 Battery you need - https://amzn.to/3cada7O

Here is a little turtorial on how to change your weak / dying or dead 2032 battery in your Highlander Rav4 key fob. All you need is your new battery and also a small screwdriver. Follow the steps in the video and you're all set!

Toyota Part Number: 89904-0E120, 89904-0E121 (both parts are the same)
AG board inside
FCC ID: HYQ14FBA
Frequency: 315 MHz
Battery: CR2032
Emergency insert key same as: 69515-33100
Reusable: Reusable: Yes, immobilizer reset required
On Board Programming: No
This remote also fits:

14 15 16 17 18 19 Toyota Highlander with proxy, smart keyless system
2014 2015 2016 2017 2018 2019
13 14 15 16 17 18 19 Toyota RAV4 with proxy, smart keyless system
12 13 14 15 16 17 18 19 Toyota Prius (Prius C MODELS ONLY)