Abstract: A method for detecting buzz, squeak, or rattle of interior components in a vehicle. A sine sweep signal is output through speakers of an audio system mounted in the vehicle capable of causing buzz, squeak, and rattle by defective installed parts in the vehicle. Audible sounds within the vehicle are recorded by a portable test unit during the outputting of the sine sweep signal. A component of the recorded audible sounds corresponding to the direct recording of the sweep signal is removed. Recorded audible sounds are recorded without the component to determine if a predetermined threshold is exceeded. A vehicle repair indication is generated in response to a determination that the sound exceeds the predetermined threshold.