<p>Actuator saturation is a critical issue in control systems, leading to performance degradation or even instability when control signals exceed physical constraints. While significant progress has been made in anti-saturation control for linear systems, research on nonlinear systems, particularly in automotive active suspension applications, remains limited. This paper proposes a novel adaptive fault-tolerant control framework featuring a first-order filtering correction strategy to address actuator saturation in vehicle active suspension systems. The key innovation lies in a saturation-dependent control architecture that incorporates a real-time compensation mechanism, which remains dormant during normal operation and activates only upon saturation detection, thus avoiding unnecessary performance constraints. The main contributions include: (1) a unified anti-saturation fault-tolerant control scheme that effectively decouples saturation effects from controller parameters while preserving stability and dynamic performance; (2) a first-order filtering correction method that mitigates saturation-induced distortions without compromising transient response; and (3) successful implementation in automotive active suspension systems, demonstrating effective handling of both actuator faults and input saturation under practical conditions. The proposed method offers a practical solution for improving ride comfort and handling stability under real-world actuator limitations. Theoretical analysis and simulation results validate its superiority over conventional anti-windup schemes in terms of vibration suppression, fault tolerance, and saturation compensation. This work contributes to a new direction for nonlinear anti-saturation fault-tolerant control in constrained automotive systems and provides a foundation for intelligent anti-saturation control development.</p>