Welcome to the comprehensive service and repair manual for the 1990 Nissan Maxima. This vehicle, part of the J30 platform, represents a commitment to engineering quality and reliability in the premium sporty sedan segment. Introduced as a significant redesign, the 1990 Maxima featured a more aerodynamic and luxurious styling, powered by a 3.0L SOHC V6 engine (VG30E) delivering approximately 160 horsepower and 182 lb-ft of torque. Known for its comfortable ride and refined interior, the Maxima of this era offered both a 4-speed automatic and a 5-speed manual transmission, driving the front wheels. This manual provides detailed information to ensure the optimal performance and longevity of your Maxima. This manual serves as an essential resource for owners, mechanics, and technicians, offering factory-level technical data and step-by-step procedures for all major vehicle systems. It covers comprehensive maintenance schedules, including oil and filter changes, spark plug replacement, and critical timing belt service. Detailed diagnostic information, troubleshooting guides, and repair procedures for the engine, drivetrain, brakes, suspension, steering, electrical systems, HVAC, and body components are included. Furthermore, the manual provides insights into known issues such as potential idle control valve problems and CV joint wear, alongside rebuild procedures for the engine and transmission, ensuring that all aspects of your 1990 Maxima can be effectively maintained and repaired.