<div class="section abstract"><div class="htmlview paragraph">This research study investigates the influence of undercover design on three critical aspects of vehicle performance: water entering into air intake filter, Aerodynamic performance, thermal performance on vehicle engine room components (Condenser, Radiator and Air Intake System). Undercover serves the purpose of protecting Engine, underhood components and also improves aerodynamics of the vehicle. Through CFD simulations, various undercover design configurations: Full Undercover, no undercover and half undercover cases are evaluated to assess their effectiveness in mitigating the water ingress into the air intake system. Additionally, we explore the implications of these design alterations on the thermal performance and aerodynamic drag. By systematically exploring these interactions, results provided valuable insights on the effect of three undercover configurations related to vehicle performance which can help automotive engineers to develop the undercovers that strike a balance between vehicle performance and safety.</div></div>