Abstract: With the increasing need of vehicle's comfort ableness, the acoustic performance of vehicle intake system is further required. Based on the acoustic theory, the numerical method of reliability was applied to the acoustic reliability evaluation in the conceptual design of vehicle intake system. Then, based on the comprehensive score evaluation of reliability distribution in combination with the given index of acoustic reliability, the acoustic reliability of vehicle intake system was redesigned, thus getting the information on reliability optimization design of all muffler component for vehicle intake system rapidly and accurately. Therefore, the acoustic reliability design based on transfer loss can provide a reference quantitatively for the constructional design of muffler components of vehicle intake system in conceptual design, which is of significance to engineering practice.