SKU # 859524104 PART # 859-524-104

Janome Needle Plate Sensor Switch Unit 

This is the code reader to detect the different needle plates on the machine.  If you have a machine with pop-off plates, where, when you clip a plate on, the machine detects whether it's a zig-zag or straight stitch plate, and your machine isn't detecting one plate or the other, this is most likely the part that needs to be replaced. 

For Janome:MC 8900, MC 9400, MC 9410, MC 9450, MC 9480, MC 9900, Skyline S5, Skyline S6, Skyline S7, Skyline S9

For Elna 680, 760, 780, 850, eXpressive 860.