The BMW 325i, part of the renowned E30 chassis generation produced from 1982 to 1991, represents a pinnacle of BMW's engineering philosophy, emphasizing 'Sheer Driving Pleasure.' This 1990 model, specifically, offers a balanced chassis and a responsive 2.5-liter inline-six engine (M20B25) producing approximately 168 horsepower, coupled with either a Getrag 5-speed manual or a ZF 4-speed automatic transmission. Known for its durable construction and engaging driving dynamics, the 325i was a performance-oriented variant within the E30 lineup, featuring a driver-side airbag and Anti-lock Braking System (ABS) as standard for this model year. Its timeless design and sporty handling have cemented its status as a modern classic, highly appreciated by enthusiasts and restoration specialists.

This comprehensive Full Service & Repair Manual in English is designed to be the definitive resource for owners and technicians working on the 1990 BMW 325i (E30). It covers all major mechanical, electrical, and body systems, including detailed engine overhaul procedures for the M20B25, transmission service for both manual and automatic variants, drivetrain, suspension, steering, and braking systems. The manual also provides in-depth guidance on the electrical system, HVAC, interior components, and advanced diagnostic procedures, complete with troubleshooting charts and wiring diagrams. Its scope extends to routine maintenance tasks, major repair instructions, and specific technical data, ensuring that users can effectively maintain, diagnose, and repair this iconic vehicle.