This manual covers the 733i and 735i, a series of full-size luxury sedans produced for the U.S. market under the E23 chassis code from 1977 to 1986. These vehicles embody renowned engineering philosophy, characterized by driver-centric design, powerful inline-six engines (3.2L in the 733i and 3.4L in the 735i), and advanced chassis dynamics. Known for their blend of performance, luxury, and innovative technology for their era, they competed with prestigious models from Mercedes-Benz and Jaguar, solidifying BMW's presence in the luxury sedan segment.

This comprehensive service and repair manual provides detailed guidance for all U.S. 733i and 735i models, covering all engine variants. With over 1000 pages of factory-level detail, it encompasses routine maintenance, diagnostics, troubleshooting, and complete overhaul procedures for all major systems, including the engine, transmission, drivetrain, suspension, steering, brakes, and electrical systems. It also details body and chassis components, HVAC, and interior systems. This resource is designed to assist owners, mechanics, and technicians in effectively maintaining, diagnosing, and repairing these vehicles.