This comprehensive repair service manual covers the BMW 320i and 325i E30 models produced between 1983 and 1991. It offers detailed specifications and procedures, providing the same level of information available to authorized BMW service departments. This manual is ideal for car owners with basic mechanical skills or independent auto service professionals who want to perform their own repairs and maintenance. It also empowers car owners who may not intend to work on their vehicles to better understand the complex workings of their BMW and communicate more effectively with automotive technicians. The manual delves into every aspect of the BMW 320i and 325i E30, encompassing topics such as: * **General Information:** Provides an overview of the vehicle's design, specifications, and operating principles. * **Engine Service and Overhauling:** Covers engine maintenance, repair, and complete rebuild procedures, including detailed explanations of engine components, lubrication systems, and cooling systems. * **Transmission:** Explores the workings of the manual and automatic transmissions, offering troubleshooting guides and repair procedures. * **Chassis:** Provides in-depth information on the vehicle's chassis, suspension, and steering systems, including complete repair guides and diagrams. * **Body:** Covers bodywork repair, paint procedures, and related components. * **Wiring:** Includes comprehensive wiring diagrams and explanations for all electrical systems, making troubleshooting and repairs easier. * **Fuel System:** Provides detailed information on fuel injection systems, fuel lines, and fuel tanks, along with troubleshooting procedures and repair guides. * **Emission Control:** Covers the vehicle's emission control systems, including catalyst, oxygen sensors, and related components. * **Induction:** Offers detailed explanations and repair procedures for the vehicle's intake and exhaust systems. * **Mechanical:** Provides comprehensive information on the mechanical aspects of the vehicle, including brakes, suspension, and steering. * **Control System:** Covers the electronic control systems, including engine management, ABS, and other features. * **Transmission and Differentials:** Explains the workings of the transmission and differential systems, offering detailed repair procedures and troubleshooting guides. * **Troubleshooting and Diagnostics:** Provides a comprehensive guide to diagnosing and resolving various mechanical and electrical issues, aiding in identifying the root cause of problems. * **Steering and Suspension:** Covers the steering and suspension systems, including alignment, repair, and maintenance procedures. * **Brakes:** Provides detailed information on the braking system, including components, maintenance, and repair procedures. * **ABS:** Explains the anti-lock braking system, including its operation and troubleshooting procedures. * **Full Specifications and Torque Settings:** Includes a complete set of vehicle specifications and torque settings for accurate repairs. * **Service Work:** Outlines recommended service schedules, maintenance procedures, and other essential information. This manual empowers you to tackle repairs and maintenance confidently, understand your vehicle better, and communicate effectively with automotive technicians, saving you money in the long run.

The BMW E30, produced from 1982 to 1994, marked a significant shift in the brand's identity. While the preceding E21 3 Series was a sporty coupe, the E30 expanded upon the platform, offering a wider array of body styles, from the classic two-door sedan and coupe to the practical four-door sedan and even a wagon, known as the Touring. The iconic 3 Series lineage, known for its driving dynamics and performance, was solidified with the E30. It introduced features like the M3, a high-performance variant that cemented BMW's reputation for motorsport prowess. The E30 was also known for its reliability and durability, making it a popular choice among enthusiasts and everyday drivers alike. Specifically, the BMW 320i and 325i models, produced between 1983 and 1991, offered compelling performance and handling. The 320i was equipped with a naturally aspirated 1.8-liter four-cylinder engine, delivering smooth power and efficiency. The 325i, on the other hand, boasted a 2.5-liter six-cylinder engine, providing a more potent and exhilarating drive. Both models featured a rear-wheel-drive configuration, a hallmark of BMW vehicles, which contributed to their agile and precise handling. The E30's refined chassis and sophisticated suspension system ensured a comfortable ride while providing excellent control and feedback, making it a joy to drive on both winding roads and open highways.