The 2.4L engine with the 6th digit VIN '1' is a naturally aspirated inline 4-cylinder engine compliant with California's Partial Zero Emission Vehicle (PZEV) standards. This engine is specifically designed for Coupé models, offering steady power delivery and fuel efficiency through its multi-point fuel injection system. The durable inline 4-cylinder structure ensures reliable performance, while the dual overhead camshaft (DOHC) enhances control and precision. This used engine is ideal for Coupé drivers looking for a California-compliant option that provides both efficiency and performance.