Walter M Huntington Beach , CA August 10, 2014 Appliance: General Electric Microwave JES1139BL03 Ge Microwave Jes1139bl03: Broken roller assembly. How to replace Guide Roller Ass'y. I ordered a new one being sure that it was the one to fit my particular microwave as the mfg. part number is the same for various models. It is helpful that Appliance Paerts has a cross reference to make sure the right part is in stock for the right model. Item was in stock, deivery was fast, and my mirowave is fully operational. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes