This comprehensive repair service manual is specifically designed for the BMW 733i and 735i E23 models produced between 1983 and 1985. It covers both the 3.2L engine found in the 733i and the 3.4L engine found in the 735i. The manual provides detailed, step-by-step procedures with accompanying illustrations and diagrams, making it an invaluable resource for both professional mechanics and DIY enthusiasts. With its expansive coverage, you'll find everything you need to tackle a wide range of repairs and maintenance tasks. The manual delves into various aspects of the vehicle, including:

- **Introduction:** Provides an overview of the manual's structure and content.
- **Maintenance:** Covers routine maintenance procedures like oil changes, filter replacements, and fluid checks.
- **Engine:** Addresses the intricacies of the engine, including its components, operation, and common issues.
- **Engine Electrical System:** Provides guidance on diagnosing and repairing electrical components related to the engine.
- **Fuel System:** Offers comprehensive information on fuel delivery, injection, and related systems.
- **Radiator:** Covers the cooling system, including the radiator, hoses, and thermostat.
- **Exhaust System:** Explains the exhaust system's design, operation, and maintenance.
- **Clutch:** Details the clutch mechanism, its components, and troubleshooting procedures.
- **Manual Transmission:** Provides detailed information on the manual transmission, including its operation and repair.
- **Automatic Transmission:** Covers the automatic transmission's workings, maintenance, and common problems.
- **Gearshift Mechanism:** Explains the gearshift mechanism and its components.
- **Propeller Shaft:** Provides information on the propeller shaft, its function, and maintenance.
- **Front and Rear Axle:** Addresses the front and rear axles, including their components, operation, and potential issues.
- **Steering & Wheel Alignment:** Includes information on steering system components, alignment procedures, and adjustments.
- **Brake System:** Covers the brake system in detail, encompassing components, operation, and repair techniques.
- **Wheel & Tire:** Provides guidance on wheel and tire maintenance, including tire rotation and balancing.
- **Body:** Addresses bodywork, including common repairs and maintenance.
- **Body Equipment:** Covers the various body equipment components, such as mirrors, handles, and trim.
- **Seats:** Details the seat systems, including adjustments, repairs, and upholstery.
- **Electrical System:** Provides a comprehensive overview of the vehicle's electrical system, including wiring diagrams and troubleshooting procedures.
- **Instruments:** Covers the instrument cluster and gauges, their functions, and potential issues.
- **Lights:** Explains the vehicle's lighting system, including headlights, taillights, and interior lights.
- **Heating & Air Conditioning:** Addresses the heating and air conditioning system, providing information on its components and operation.
- **Radio & Special Equipment:** Covers the vehicle's radio and optional equipment, including installation and troubleshooting.
- **Equipment & Accessories:** Provides information on optional equipment and accessories available for the BMW 733i and 735i E23.

The BMW E23, produced from 1977 to 1986, marked a significant turning point in the brand's history, solidifying its reputation for luxury and performance. The 733i and 735i, introduced in 1983 and 1985 respectively, represent the final iterations of the E23 series, boasting a refined blend of comfort and driving dynamics. These models inherited the spacious interior and elegant styling of their predecessors, incorporating subtle cosmetic updates that emphasized a more contemporary aesthetic. The 733i, powered by a 3.2-liter inline-six engine delivering 184 hp, offered a comfortable and refined driving experience, while the larger 735i, featuring a 3.4-liter inline-six engine producing 218 hp, provided a more spirited performance. Both models were offered with a choice of a four-speed automatic or a five-speed manual transmission, ensuring a tailored driving experience.

The E23 733i and 735i were equipped with a comprehensive range of features designed to enhance comfort and convenience. Power steering, power brakes, and air conditioning came standard, while options included a sunroof, cruise control, and an advanced sound system. The interior, crafted with high-quality materials and meticulous attention to detail, showcased a blend of luxury and functionality. The spacious cabin provided ample room for passengers, while the driver enjoyed a commanding view of the road. Despite the focus on comfort, the E23 733i and 735i maintained a sporty handling characteristic thanks to its well-balanced chassis and precise steering. These qualities, combined with the reliable and powerful engine options, made these models highly desirable for drivers seeking a luxurious and capable driving experience.