Twyla P Lake Mills , IA November 13, 2015 Appliance: Model 8183851 (AP3119799) THIS IS THE PART NUMBER. Broken microwave vent grill Ordered the microwave vent grill by Whirlpool which amazingly arrived the next day and my husband fixed it as soon as he got home from work that day. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes