To properly consider the actual product shape and manufacturing state, the semi-circular VDA 230-206 standard test jig was replaced with a jig capable of installing the inner belt weatherstrip, and the test equipment was set up considering the amount of overlap of the inner belt. The test speed applied was 1–40 mm/s to obtain stable results. The evaluation results (Figure 18) showed that the magnitude of acceleration was reduced from 0.42 g to 0.24 g (43% reduction) compared to the base sample. Empirically, at an acceleration of 0.3 g or more, squeak is minimal. As the acceleration in the modified samples was less than this value, it can be predicted that there will be no squeaking noise under actual vehicle conditions.