Product review (2 stars): Not OEM!  No way, no how. This is a rebuilt part. Just hope it lasts.
It may have been OEM before the rebuild but the part I received is not original equipment. The photo they show has the correct impeller on it. It's not what I received.  The impeller that came on the part they shipped is very flimsy and not nearly as dense/thick plastic as the original part it replaced. If you look at all the failed one-star reviews, that's the impeller on the part that they will ship to you not the one in the photo.  I'm giving it two-stars because it fit and I hope it works for longer than some of the failed reviews here.  Having said that. My LG is working again and all it cost me was $26 and an hour of my time.
For those about to attempt to replace your pump, there are two ways. Through the bottom or remove the front panel. I removed the front panel only because there was no room to tip the machine on its side.  There are half a dozen YouTube videos showing how.  BUT what they don't show you is how difficult it is to put the door boot gasket back on. There's a steel wire that's spring loaded to hold the boot in place. It requires a special spreader tool to expand it far enough to slip on. Since I didn't have one I improvised and asked for help. It took three hands and three flat head screwdrivers to pry it back on. Just put the ring on as far as you can by hand and then slowly wedge the ring down. Easy peasy. In all it's less than an hours work.