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
Amazon.com: Key Fob Battery Replacement Compatible with Lexus is (2014-2021 Lexus is, CR2032 Remote Battery) : Automotive
Lithium Battery, #2032, 3-Volt, 4-Pk. | True Value