Im not sure if this is the right thread catagory for this. Its an odd issue. As some of you know there is a vent in our trunk. Driver side under the liner there is a plastic vent thing that fills a massive rectangle hole in the body. Not sure why there needs tp be a vent here but anyway. Car is fully stock but after doing a pull I smell exhaust in the car. Windows cracked or down i smell it. Took out the liner in the trunk and the plastic piece was completely missing. Must have fallen out or something. So the hole is open and letting in air right into my trunk. Think this is the cause of the smell. Where would i get a new piece to put back in? As of now i used 3m tape and cardbord to cover it up with a smaller hole in it for venting porposes.