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Knock sensor

The knock sensor detects the combustion knock. Spontaneous ignition is an unwanted ignition caused by glowing parts in the cylinder. Spontaneous ignition can occur on engine with direct fuel injection. The knocking is detected on a cylinder-selective basis by the DME control module.

Fig 1: Identifying Knock Sensor And Plug Connection
G09871098Courtesy of BMW OF NORTH AMERICA, INC.
Index Explanation
1 2-pin plug-in connection
2 Knock sensor
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