Never been a fan of the LX CLadding. Never been a fan of buying used cars from a dealer (unless I have a personal relationship with them). If I’m buying a vehicle from a dealer and it has known issues that are as simple as a battery and O2 sensor and they haven’t fixed them, I run away. No way ins million years would a reputable dealer put a vehicle in their lot with a CEL and dead battery. Be patient. Take up @LINUS offer of help. Buy an actual Land Cruiser without all the floofy cladding.