On certain Jeep Cherokee vehicles, the fitting for the PCV valve hose often snaps off of the airbox housing. That fitting is friction-welded to the airbox during manufacturing, creating a weak spot, and when it snaps, the only replacement available from a Jeep dealership is the entire airbox assembly. This Dorman OE FIX airbox lid uses a stronger molded PCV valve fitting with reinforcements for additional strength. This part also saves repair costs by replacing just the damaged lid, which is not available as a seperate part.