Just got my 2010 EX-L i4 sedan three weeks ago, and a few days ago I noticed that on the panel behind the left rear headrest (just in front of the speakers), there was what appeared to be a drill hole. Curious that it was only on one side and not the other, I called my Honda service center. The service guy was unaware of this so he told me he would have someone call me back on this. About 15mins later I got a call back from another service guy; he told me that him and two other sales managers went to look at their other cars of the same model and they all had it. They said they did not know that this existed on the 2010 Accords before and none of them knew what it was! I was just relieved that it wasn't a defect on my car. Just thought that you guys might find this interesting of if anyone else noticed this or know what purpose this "drill hole" serves.