Diagnostic unit nut. MODULES AND SENSORS. A solid metal or plastic block with a threaded hole in the center which is used to tighten or adjust the Air Bag Crash Sensor. A solid metal or plastic block with a threaded hole in the center which is used to tighten or adjust the Body Control Module. A solid metal or plastic block with a threaded hole in the center which is used to tighten or adjust the Glow Plug Control Module. Air Bag Control Module Nut. Window Regulator Nut. Air Bag Impact Sensor. Body Control Module. Bracket. Diagnostic unit. Diesel Glow Plug Controller. Ft Impact Sensor. Hex. Power Regulator. Remote Control. Window Regulator.