The MDX is a silent runner. The engine is virtually noiseless at idle and cruise, and only makes the right kinds of sounds at full throttle. There is a little bit of wind noise around the top of the A-pillar and outside mirror, but you’d have to be going jail-time fast for it to be intrusive in any way. You get some occasional thumps from the road, but it’s just reinforcing the sporty nature of the MDX rather than intruding on your personal space. Overall, there is very little noise that you don’t want to hear, and if the remainder bothers you it can easily be covered by the excellent sound system, even at low volumes.