LOL! They NEVER made a Lexus LS300 nope never! That would be a 3 liter motor which would be the 1mz-fe in the ES300 and RX300. This is the VVT-i motor with the redesigned intake manifold. Does that have a ECU with the car cause I think there is a issue with the engine immobilizer and the keys. Haven't toyed with one of these yet out of the car want to though. Bump for good price edit the car.