This comprehensive service repair manual is specifically designed for the 1994 BMW E31 850i and 840i models. It covers both the body, chassis, and electrical systems in detail, providing you with a complete understanding of your vehicle's inner workings. Within its pages, you'll find detailed wiring diagrams, technical diagnostic procedures, disassembly and installation instructions for all components, and numerous illustrations and diagrams to clarify complex processes. This manual, originally published in November 1994, is the most complete workshop manual available for these models. It was created by BMW and used by their dealership mechanics, ensuring the highest level of accuracy and reliability. The information is organized into groups covering general information, diagnosis, testing, adjustments, removal, installation, disassembly, and assembly procedures for all systems and components. The included M70 training manual provides in-depth information on the powerful M70 engine. This manual covers the M73, M70, and M60 engines, as well as both automatic and manual transmissions. The precise tightening torques provided throughout ensure correct assembly and installation using OEM fasteners. Always replace fasteners with the same type (part number) as the ones removed. This manual is an indispensable resource for any professional automotive technician or dedicated DIY enthusiast working on a 1994 BMW E31 850i or 840i.

The BMW E31 8 Series, launched in 1989, was a luxurious grand tourer that aimed to elevate the brand's image and compete with established players like the Mercedes-Benz S-Class Coupe. The 850i, the initial model, featured a powerful 5.0-liter V12 engine generating 300 horsepower, while the 840i, introduced later, came equipped with a 4.0-liter V8 engine producing 282 horsepower. The E31 was a technological marvel for its time, boasting features like an advanced multi-link suspension, a sophisticated electronic stability program, and a digital instrument cluster. Its elegant, low-slung design, penned by Claus Luthe, was instantly recognizable and contributed to its luxurious appeal. The E31, however, faced challenges in the market due to its high price point, significant weight, and complex engineering, leading to limited production numbers. Despite its commercial limitations, the E31 8 Series holds a special place in BMW history. It is revered by enthusiasts for its refined driving experience, powerful engines, and timeless design. The M70 V12 engine, found in the 850i, is a testament to BMW's engineering prowess, offering a smooth and potent power delivery. The E31's unique blend of luxury, performance, and technology cemented its status as a true grand tourer. While production ended in 1999, the E31 8 Series continues to capture the imagination of car enthusiasts and remains a coveted classic in the automotive world. This service and repair manual, alongside the M70 training materials, provides invaluable information for those who wish to maintain and understand this complex yet rewarding vehicle.