This workshop service repair manual covers the BMW D12 Marine Diesel Engine, designed for reliable marine propulsion. Engineered for demanding maritime environments, this diesel engine exemplifies BMW's commitment to quality and performance. Its robust construction and advanced diesel technology ensure efficient operation and longevity, making it a trusted choice for boat owners and operators. This comprehensive manual provides all service and repair procedures from A to Z, presented with step-by-step instructions and accompanying images. It is designed to assist owners, mechanics, and technicians in maintaining and repairing the BMW D12 engine. Key areas covered include detailed maintenance schedules, fluid specifications, troubleshooting guides, and technical data, ensuring the engine operates at peak performance and reliability throughout its service life.