The 1991 Citroën XM represents a significant achievement in automotive engineering, embodying the brand's legacy of innovation and comfort. This executive-class hatchback, designed by Bertone, features striking aerodynamic styling and a futuristic interior. Its most notable innovation is the revolutionary Hydractive hydropneumatic suspension system, which delivers an unparalleled ride quality and adaptive handling. Positioned to compete with other premium European sedans of its era, the XM was lauded for its advanced safety features and sophisticated design, earning it the European Car of the Year award in 1990.

This comprehensive service manual provides detailed information for the 1991 Citroën XM (chassis code Y4). It covers all essential aspects of maintenance, repair, and diagnostics, offering guidance on engine variants, transmissions, the hydropneumatic suspension, braking systems, and electrical components. The manual includes step-by-step procedures, troubleshooting guides, and technical specifications, making it an indispensable resource for owners, technicians, and mechanics. With an estimated 1500+ pages, this English-language factory service manual is designed to facilitate the proper upkeep and repair of the vehicle, ensuring its continued performance and reliability.