The 43420 (specifically 43420-48110, 43420-0W190, or 43420-48111) refers to the Front Drive Shaft Assembly (Left Hand/LH) for the Lexus RX400h (MHU38), produced between 2005 and 2009. This part is designed for the AWD (All-Wheel Drive) 3.3L V6 hybrid model (3MZ-FE engine).