Introduction <p>The demand for advanced vehicle suspension systems has led to growing interest in semi-active dampers, particularly magneto-rheological (MR) dampers, due to their adaptive capabilities and effective vibration attenuation compared to traditional passive systems.</p> Purpose <p>Vibration in land transport affects vehicle components and can impair driver alertness, concentration, and safety. This work proposes a hybrid semi-active vibration isolator that combines a Bouc-Wen model and a four-parametric viscoelastic model, enabling simultaneous control over damping and stiffness to improve vehicle vibration control. </p> Methodology <p>A hybrid control approach combining the FLC and PID controllers with the Gaussian membership functions of twenty-five rules is employed. The performance of the vibration isolators is evaluated in frequency and time domains through numerical simulations conducted under sinusoidal excitations.</p> Results <p>The simulation results show that the settling time is decreased by 4.55% and 41.67% as compared to the damper with variable damping and the passive system, respectively. When compared to the damper with variable damping, the suggested model decreases the peak displacement by 66.67% and 63.64% and the RMS acceleration by 44.85% and 44.76% for the front and rear wheels, respectively. In a similar vein, when compared to a passive system, the proposed system reduces peak displacement for the front and rear wheels by 86.96% and 88.89%, respectively. The seat's peak displacement is decreased by 44.44% and the RMS acceleration by 51.79% when compared to the passive system and the variable damping, respectively.</p> Conclusions <p>The frequency and time domain analysis confirm substantial reductions in transmissibility, resonance peaks, RMS acceleration, peak displacement, and settling time, indicating its potential for semi‑active suspension applications seeking improved ride comfort and vehicle stability. </p>