The Alfa Romeo 166, produced between 1998 and 2008, is an executive sedan renowned for its distinctive Italian styling, driver-focused interior, and performance-oriented 3.2 V6 engine. This model embodies a blend of sophisticated design, drawing influence from renowned Italian design houses, and a commitment to a dynamic driving experience, positioning it as a compelling alternative to established German luxury marques. Its engineering quality and reliability are supported by a robust chassis and a powerful naturally aspirated V6 petrol engine, offering a unique proposition in its segment. This comprehensive factory service repair manual provides in-depth guidance for the maintenance and repair of the Alfa Romeo 166, covering the period from 1998 to 2008. It details essential information across various systems, including the engine, drivetrain, electrical system, and chassis, along with crucial technical specifications and troubleshooting procedures. The manual is designed to empower owners and professional technicians with the knowledge required to ensure optimal performance and longevity of the vehicle, offering detailed, step-by-step instructions for a wide range of repair and maintenance tasks.