Key battery low." Oh great, what's that going to cost me? $400 and can only be done at the dealership? Oh, you can open the fob with the key itself and replace
Replace the Key Fob Battery on a Toyota 86, FRS or BRZ
Toyota Key Fob Replacement | Toyota Key Fob Battery Holman Toyota
2 Pk Smart Key Fob Remote Sony now Murata KeyFob Battery CR2032 Fits TOYOTA | eBay