This comprehensive service and repair manual for the BMW 5-series (E12) model year 1974 provides detailed instructions, diagrams, illustrations, wiring schematics, and specifications to help you maintain, service, diagnose, and repair your vehicle. It covers all models and all repairs extensively, offering the same information used by technicians at authorized dealerships.

The manual is organized in a user-friendly format, enabling you to easily find the information you need. You can print only the specific pages and diagrams required for your task, eliminating the need to flip through numerous pages. The detailed instructions, combined with clear illustrations and wiring schematics, guide you through every step of the repair process.

This manual covers a vast array of topics, including:

* **Maintenance:** Regular maintenance schedules, fluid checks, and filter replacements.
* **Engine:** Engine specifications, troubleshooting, and repair procedures for components like the cylinder head, crankshaft, and valves.
* **Control System:** Explanation of electronic systems, sensor operation, and diagnostics.
* **Mechanical:** Detailed information on the transmission, suspension, brakes, and steering systems, covering both manual and automatic transmissions.
* **Fuel Service Specifications:** Fuel system components, fuel injection systems, and fuel lines.
* **Emission Control:** Understanding emission control systems, diagnostics, and repair procedures.
* **Intake Exhaust Cooling:** Information on cooling system components and troubleshooting.
* **Lube:** Lubrication specifications and procedures for all vehicle components.
* **Ignition Starting Charging:** Detailed coverage of the ignition system, starting system, and charging system.
* **Auto Transmission Clutch:** Operation, maintenance, and troubleshooting of automatic transmissions.
* **Manual Transmission:** Maintenance and troubleshooting procedures for manual transmissions.
* **Transfer Propeller Shaft:** Information on the transfer case, propeller shaft, and related components.
* **Drive Shaft:** Maintenance and repair procedures for drive shafts.
* **Differential:** Differential operation, maintenance, and repair.
* **Axle Suspension:** Comprehensive coverage of axle and suspension components.
* **Tire & Wheel:** Information on tire types, sizes, and recommended maintenance.
* **Brake Control:** Brake system operation, diagnostics, and troubleshooting.
* **Brake:** Brake system components, adjustments, and repair procedures.
* **Parking Brake:** Operation, adjustment, and repair of the parking brake system.
* **Steering Column:** Steering column components, adjustments, and repair.
* **Power Steering:** Power steering system operation, diagnostics, and troubleshooting.
* **Air Condition:** Information on the air conditioning system, operation, and repair procedures.
* **Suppl Restraint System:** Seatbelt system operation and maintenance.
* **Engine Immobilizer:** The anti-theft system and its operation.
* **Cruise Control:** Cruise control system operation and troubleshooting.
* **Wiper & Washer:** Maintenance and repair of the windshield wiper and washer system.
* **Door Lock:** Door lock mechanisms, operation, and troubleshooting.
* **Meter Audio/Visual:** Information on the instrument cluster, gauges, and warning lights.
* **Horn:** Horn operation and troubleshooting.
* **Windshield/Glass Mirror:** Windshield and mirror replacement procedures.
* **Instrument Panel:** Instrument panel components, operation, and repair.
* **Seat:** Seat adjustments, repairs, and upholstery information.
* **Engine Hood/ Door:** Hood and door latch mechanisms, operation, and repair.
* **Exterior & Interior:** Information on exterior and interior trim, lighting, and other components.
* **Electrical:** Detailed wiring diagrams and explanations of electrical systems.
* **Multiplex/ Can Communication:** Information on the vehicle's communication network.

This manual provides you with the knowledge and resources to confidently tackle a wide range of repairs and maintenance tasks on your BMW 5-series (E12), potentially saving you time and money.

The BMW 5-Series (E12), launched in 1972, marked a significant step in BMW's evolution, establishing the brand's reputation for building comfortable and engaging driving machines. The E12, the first generation of the 5-Series, was a direct replacement for the aging BMW Neue Klasse sedans, carrying the torch for BMW's mid-size luxury car segment. It was an instant success, known for its sharp handling and refined driving experience, qualities that would become synonymous with the 5-Series nameplate. The car's distinct design, penned by Paul Bracq, featured clean lines and a subtle elegance, reflecting the evolving design language of the era. Under the hood, the E12 initially offered a range of powerful inline-six engines, including the iconic 2.0-liter M20 unit, which later became the foundation for the legendary M5.

The BMW 5-Series (E12) was a technological marvel for its time, boasting innovative features like an independent rear suspension and a high-precision steering system. The car's driving dynamics were lauded by critics and enthusiasts alike, earning it a reputation as a driver's car. The E12 was also one of the first BMWs to feature a fully integrated dashboard design, a concept that would become a hallmark of the brand's future models. Despite its relatively short production run, the E12 5-Series left a lasting legacy, establishing itself as a classic and highly sought-after collectors' car. The car's blend of performance, comfort, and timeless design has ensured its enduring appeal, making it a valued part of automotive history.