Are you sure it's seated correctly? There are two white guide holes on the header panel, and two pins on the headlight that go in those holes to line it up. Sometimes on aftermarket headlights, those pins don't line up exactly, but they aren't far off and can be man handled into place. I've had 3 sets of headlights for my 04. One OEM and two aftermarket, and I've never had any issues with fitment.