The BMW 3 Series E21 1983 Service Repair Workshop Manual provides comprehensive service and repair instructions for your vehicle. This manual is designed to be used by both experienced mechanics and DIY enthusiasts. It includes detailed step-by-step instructions, diagrams, illustrations, wiring schematics, and specifications to help you troubleshoot and repair your BMW 3 Series E21 1983. The manual covers a wide range of topics, from general information to detailed system breakdowns. This includes: * **General Information** for your BMW 3 Series E21 1983. * **Engine Mechanical System** covering components like the engine block, pistons, crankshaft, and connecting rods. * **Engine Electrical System** encompassing the starter, alternator, ignition system, and wiring diagrams. * **Emission Control System** details the components responsible for reducing harmful emissions. * **Fuel System** covering the fuel tank, fuel lines, fuel pump, and fuel injectors. * **Clutch System** explains the operation and maintenance of the clutch assembly. * **Manual Transaxle System** details the workings of the manual transmission. * **Automatic Transaxle System** covers the components and operation of an automatic transmission. * **Driveshaft and Axle** includes information on the driveshaft, axles, and related components. * **Suspension System** covers the suspension components like springs, shocks, and control arms. * **Steering System** details the steering wheel, steering column, and power steering system. * **Restraint System** including information on seatbelts and airbags. * **Brake System** covers the brake calipers, rotors, master cylinder, and brake lines. * **Body (Interior and Exterior)** provides information on the body panels, interior trim, and exterior components. * **Body Electrical System** details the wiring and electrical components related to the body. * **Heating, Ventilation, and Air Conditioning (HVAC)** explaining the operation and maintenance of the HVAC system. This manual offers the same level of detail and accuracy as the information used by authorized BMW dealerships. It empowers owners with the knowledge and tools to perform repairs themselves or to confidently discuss repairs with a qualified mechanic.

The BMW 3 Series E21, produced from 1975 to 1983, marked the beginning of a legendary lineage that continues to this day. This first-generation 3 Series, internally designated as E21, was a significant departure from BMW's previous sedans. It was smaller, lighter, and significantly more agile, embodying the brand's growing focus on performance and driving pleasure. The E21 was available with a range of four-cylinder petrol engines, including the iconic M10 unit, which powered the legendary 320i and 323i models. The 3 Series E21 was offered in various body styles, including a two-door sedan, a two-door coupe, and a rare three-door hatchback. This model line established the core values of the 3 Series, becoming a global success and solidifying BMW's reputation as a manufacturer of sporty and refined automobiles. The 1983 model year marked the end of production for the E21, making it a sought-after classic for enthusiasts today. This final year of production saw several revisions, including the introduction of the 323i with a fuel-injected engine and the availability of the desirable "Sport" package, which included a sports suspension, a limited-slip differential, and sporty styling enhancements. The 1983 E21 also boasted a spacious and well-appointed interior, with comfortable seats, a comprehensive instrument cluster, and excellent visibility. While considered smaller than modern compact cars, the E21's interior offered a surprisingly comfortable and well-designed driving experience. The 1983 BMW 3 Series E21, with its robust construction, powerful engine options, and refined driving characteristics, remains a testament to the enduring legacy of the BMW 3 Series lineup.