This comprehensive wiring diagram provides detailed information on the electrical system of the 1991 BMW 850i E31. It covers every aspect of the vehicle's wiring, from the engine bay to the interior, and includes diagrams for all components, circuits, and connectors. This manual is an essential resource for mechanics, technicians, and DIY enthusiasts working on this iconic car, enabling them to diagnose and repair electrical issues with confidence. It will help you understand the complex wiring system of the 850i, identify and troubleshoot problems, and perform repairs efficiently.

The 1991 BMW 850i E31, a stunning embodiment of German engineering and luxury, was a groundbreaking grand tourer that forever changed the landscape of automotive design. This sleek, low-slung coupe, with its signature long hood, flowing lines, and distinctive "shark nose" grille, was a testament to BMW's commitment to both power and elegance. Under the hood, a potent 5.0-liter V12 engine, producing a formidable 300 horsepower, propelled the 850i to impressive speeds, while a sophisticated electronically controlled five-speed automatic transmission, coupled with an advanced independent suspension system, provided a smooth and confident ride. The 850i's interior, a haven of leather, wood, and meticulously crafted details, offered a luxurious and refined driving experience, with advanced features like power seats, climate control, and an optional navigation system. Beyond its performance and opulence, the 1991 BMW 850i E31 represented a significant technical leap forward for BMW. The car's electrical system, a complex network of wiring, sensors, and control modules, was designed to seamlessly integrate all the car's sophisticated features. The wiring diagram, a comprehensive guide to the electrical system's architecture, is an essential tool for understanding the car's inner workings. It serves as a blueprint for mechanics, technicians, and even enthusiasts seeking to repair, modify, or simply gain a deeper understanding of the 850i's intricate electrical system. This diagram, with its detailed schematics and annotations, provides a roadmap through the maze of wires, connectors, and components that bring the 850i to life.