Trailer Hitch Installation on 2018 PHEV
I'm restarting the Hitch thread with some results. I just finished installing a Curt class III hitch with 2" receiver. I will use it for a bike rack. The local installer (Rack and Road) started the installation but couldn't finish because there is a piece on the passenger side frame that interferes with the hitch. I brought the hitch home, made a small modification of the hitch (it can be done with a hacksaw blade on a sawzall or a grinder with a cutting blade.) I then installed the hitch following the youtube instructions from eTrailer.com. The installation went smoothly.
A class III hitch is rated for significant tongue weight, which I will never approach with a bike rack. The hitch modification involved notching the vertical metal plate above the forward mounting hole on passenger side. You can leave 1/4" of metal above the hole and only need to notch the hitch about 4" so the other mounting hole is not affected at all. I don't think this weakens the hitch at all, but even if it does, the hitch, with 6 attachment points, is way over-engineered for a bike rack. Hitch installations are kind of hard and Rack and Road would have done it after I modified the hitch, but I just decided to do it myself.
I saw a video for installation of a Drawtite hitch which seemed to be more problematic. I would recommend a Curt; I know it will work on a 2018 and 2019 PHEV with a simple modification.