After the plant tour we went to Action Nissan in Nashville to discuss technical matters and this came up. There is a bulletin in Nissan's "Assist" system on this problem. It says to replace the cowling with an improved design (this in no good if you have already drilled yours, like I have done). So, if you don't want to drill yours, you could go for the replacement cowling. The Nissan folks on the tour also told us that this problem has been "engineered" out of the 2003 model.