As far as I know, Alabama made engines are used in Tundra and Lexus LX. Lexus LS and GX use Japan-made engines. But the production lines are identical, including all manufacturing steps. Toyota manufacturing process is extremely standardized, so if something has issues in one factory, it usually happens in all plants that make the same product ("monkey sees, monkey does").
LX Engines are made in Japan. Just like the LC 250 Engines. GX Engines are also made in japan.







