Product review (5 stars): LG Refrigerator Replacement Cartridge Water Filter
The filter light was blinking so we had to get a new one. Local stores didn't have this part so it had to be Amazon.

The part arrived on time - it was easy to fit - the hardest part was first removing the light cover  in the fridge.

You have to flush the filter thru with a few gallons of water, I didn't see any particles but I guess that's what you have to do.

Water tastes great, only downside is the fairly high  cost of the filter which you may need to re-place every six months