This is a cooktop burner igniter OEM replacement part for Bosch cooktops and ranges and is sold as an individual part. This part creates a spark that ignites the burner within your cooktop or stovetop and is made of a combination of metal and ceramic. Causes of a bad ignition plug can include issues with the electronic module, worn electrodes that no longer spark reliably, or damaged wiring. Symptoms of a bad ignition plug include: Gas burners that will not light or remain lit Delayed ignition of one or more burners Intermittent or no sparking from the ignition plug This OEM Bosch part is also compatible with Thermador, Gaggenau and some Kenmore models.00189324 (AP2838563) replaces 00189719, 00189773, 00189889, 00413966, 00488832, 1014099, 189324, 189719, 189773, 189889, 20-02-041, 20-02-043, 20-02-377, 20-09-245, 35-00-436, 413966, 488832, AH3440546, EA3440546, PS3440546, PS8698440.