My new 1k mile '13 has this... I took it to complain at 100 miles, and Honda said it's a "characteristic of the vehicle." This is bull. It needs to be fixed. Also, it's either getting worse or I'm more cognizant, but it's happening at other times.... when the rear-view cam turns off, and random times while driving, probably with electrical switches, e.g. A/C clutch, etc. It does it whether the stereo is on or off (keep in mind the amp is always on, because of nav, bluetooth phone, etc.).
THIS NEEDS TO BE FIXED. Don't let this thread die out, we need to keep track of this issue. Once the solution is found, all need to know what to tell their dealer to do. I do NOT want them ripping into my car and replacing everything just to guess what's wrong. As it is, they pulled out the door switches and stereo head unit already (and did nothing, BTW). This is truly an unacceptable issue. Don't let this be my first Honda warranty (or failure of warranty) experience!
Car: 2013 Civic Si sedan, Navi....