The BMW 3 Series M3 323 325 328 330 2003 Factory Service Repair Manual provides a comprehensive guide for maintaining and repairing your vehicle. From basic lubrication and maintenance schedules to detailed repair procedures, this manual covers every aspect of your BMW. Gain insights into the engine management system, delve into the intricacies of the engine, ignition, fuel system, cooling system, and exhaust system, including emission controls. The manual also equips you with knowledge on manual and automatic transmissions, clutches, driveshafts, final drive, brakes, suspension, steering, body and interior components, and the electrical system. A detailed index ensures you can easily locate the information you need.

The BMW 3 Series (E46) is a compact executive car produced by BMW from 1998 to 2006. This generation marked a significant shift in the 3 Series' design, moving away from the angular lines of its predecessors towards a more rounded and flowing aesthetic. The E46 3 Series was available in a wide range of body styles, including a sedan, coupe, convertible, and wagon, with the M3 being the high-performance variant. The 3 Series was renowned for its balanced handling, comfortable ride, and powerful engines, making it a popular choice for drivers seeking a sporty and luxurious driving experience. The 2003 model year was significant for the 3 Series due to the introduction of the M3 CSL (Coupé Sport Lightweight), a limited-edition, track-focused variant. The CSL featured weight-saving measures, including lightweight carbon fiber components, and a more powerful engine, resulting in a significant increase in performance. The 3 Series also saw updates in 2003, including revised styling, new engine options, and improved interior materials. The 2003 3 Series offered a wide range of engine options, from the entry-level 323i with its 2.2-liter four-cylinder engine to the powerful M3 with its 3.2-liter inline-six engine. Other popular engine options included the 325i with its 2.5-liter six-cylinder engine and the 330i with its 3.0-liter six-cylinder engine. The 3 Series was also available with a range of transmissions, including a five-speed manual transmission and a five-speed automatic transmission.