Product review (5 stars): LG OEM Original Part: AJH31248608 Dishwasher Sump Assembly
Saved a ton of money by purchasing this sump assy and doing the repair myself. The item was shipped quickly.  It was a chore to get it seated properly but persistence paid off.  Use plenty of rinse aid as a lubricant on the included gasket to get it seated and look for the youtube video on how to replace a sump assy if you're not a professional repair person.