"Comprises a cap, MS90376-20Y; polarizing keyway; ETI is an optional accessory that may or may not appear on the device based on the sub-assembly dash number. Sub-assembly -104 has a cover plate (10104552-101) in place of ETI; Sensor Surveyor Assy 10078752-101; Sensor Surveyor Assy 10078752-102; Plate Identification 435100; cap dust MS90376-20Y."