My passenger side foglight housing cracked while I was driving on the highway...

The thing is, when I run my fingers on the lens, the lens feel smooth as if the crack started from inside..

Is this due to excessive heat?

It was raining during the time, almost pouring non-stop. I have PIAA H11 yellows...my foglights shouldn't heat up that high if its cold, windy, and raining on the freeway...

Does my warranty cover this? I read my warranty booklet, but can't seem to find anything on stock foglight housing...

Any input would be greatly appreciated.

(I have a NHBP 2008)

 

Most likely a stress fracture of some sort - and not necessarily cause by a rock. Call up the dealership you purchased the car from, to determine if they would cover the replacement lens under warranty.

If not, I would suggest replacing both lenses with some sort of clear plexi-glass material. This way, you will not have issues with the lenses cracking due to stress of some sort.

I believe there is a write-up on TSXClub.com - just not sure where.