Honda paid attention to the sound of the closing door on its kei car, the N-ONE. In a statement quoted by the news site Norimono News, Honda recalls the saying ii kuruma wa doa no shimaru oto ga chigau, a good car has a different door-closing sound. It adds that the sound may also be a barometer of quality.
Another Honda statement in the same article says that even in a kei car, the sound of the door is one of the points that affect customer satisfaction, although it cannot be expressed in numbers.