This Venturi is an OEM part for Bosch Ranges. It plays a role in supplying air to the burner for proper combustion. Continuous exposure to heat and debris can cause this part to degrade or malfunction. What Causes a Bad Venturi:  Exposure to heat and debris from cooking can cause the venturi to deteriorate over time. Blockages or clogs in the venturi can also affect its functionality. Symptoms of a Bad Venturi: Uneven flame or inconsistent burner operation Reduced gas flow to the burner Burner flame discoloration This genuine OEM Bosch part is also compatible with Thermador, Gaggenau and select Kenmore models.00189321 (AP2821615) replaces 00189775, 1025954, 189321, 189775, 20-02-299, 20-02-396, 414774, AH3440543, EA3440543, PS3440543, PS8698437.