This manual covers the 2000 Z3 M Roadster and Z3 M Coupe (chassis codes E36/7 and E36/8 respectively). These models represent a commitment to enthusiast-focused driving, featuring the iconic S50B32 or S52B32 M-tuned inline-six engine, rear-wheel-drive dynamics, and distinct styling. The Z3 M Roadster offers open-top driving pleasure, while the Z3 M Coupe, often called the "clown shoe," is recognized for its unique design and practicality. Both vehicles are celebrated for their performance capabilities and connection to a rich motorsport heritage, making them highly sought-after by driving enthusiasts. This Electrical Troubleshooting Manual (ETM) provides comprehensive English-language guidance for all major vehicle electrical systems. It details engine management, lighting, instrumentation, comfort and convenience features, infotainment, and safety systems, including ABS and SRS. The manual includes extensive wiring diagrams, component locations, connector layouts, wiring harness information, and testing procedures, offering in-depth troubleshooting strategies for common electrical issues. Its purpose is to assist owners, mechanics, and technicians in diagnosing and repairing electrical faults, ensuring the optimal performance and longevity of these specialized M vehicles.