This Service Repair Workshop Manual provides comprehensive information for the Mitsubishi 6A12 Engine, a V6 powerplant with a 2.0 L (1998 cc) displacement. Designed for various applications and production years, this engine typically features Electronic Fuel Injection (EFI) and can be equipped with either a Single Overhead Camshaft (SOHC) or Double Overhead Camshaft (DOHC) valve train. Its performance capabilities range from 150-170 PS and 18.0-19.0 kg⋅m of torque, depending on the specific tune. The engine is compatible with both manual and automatic transmissions, commonly a 5-speed manual or a 4-speed automatic. This manual is an essential resource for owners, mechanics, and technicians, offering detailed guidance on maintenance, repair, and technical specifications. It covers critical procedures such as fluid capacities, including approximately 4.0-4.5 liters of oil and 7.0-7.5 liters of coolant. Recommended service intervals for spark plug and timing belt replacement are outlined, along with guidance on engine oil grades. The manual aims to ensure the longevity and optimal performance of the Mitsubishi 6A12 Engine through clear instructions and technical data.