Allison C Wilmington , NC February 10, 2020 Appliance: Bosch Gas Cooktop NGM8654UC/02 Bosch Cooktop Ngm8654uc/02: Broken knob on bosch cooktop. How to replace Knob. Ordered replacement knob. Shipping was fast, knob fits and matches original knobs. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes