I Purchased a 2005 Base model from a local dealer. Just the other day I realized that the passenger side low beam headlight is out. I'm assuming it's only the bulb considering the small hazard light functions and the high beams do also. I'm pretty confident that I bought it from the dealer like this.

Is the dealer responsible for replacing this? ( I'm pretty confident they're not)

What is the OEM headlight/bulb so I can purchase a new one?