Ryan H Saint Paul , MN January 15, 2017 Appliance: LG Refrigerator LRBN20512WW Lg Refrigerator Lrbn20512ww / Aswclgg: Plastic support for small drawer was broken. How to replace Rail Guide Assembly. The plastic support piece for the small drawer in my LG refrigerator broke, and I could not find an exact replacement piece for it. Instead I ordered another side support for one of the smaller shelves along with a guide assembly for the drawer. These fit perfectly once I swapped the side supports amongst the shelves appropriately, and I now have a working drawer again! 2 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes