The Ignition Device is an OEM part for Bosch ranges and ovens. Located near each gas burner, the ignition device provides the critical spark needed to light the burners during startup.  Causes of a bad ignition device can include wear from prolonged use over many years. Mineral buildup or debris accumulation may also prevent the spark from jumping across. Symptoms of a bad ignition device include: Burners failing to light or staying lit Repeated attempts needed to ignite the gas   Inconsistent flame heights or burner performance Fault codes or error messages displayed This OEM Bosch part is also compatible with Thermador, Gaggenau, and some Kenmore models.00618624 (AP4511814) replaces 00418572, 1557931, 418572, 618624, AH3478656, EA3478656, PS3478656, PS8728390.