Bosch 15733 Oxygen Sensor, Universal Fitment Revolutionary patented submersible connection system protects against water and contamination and withstands the effects of extreme temperature and engine vibration Special heat-resistant Posi-Lock connectors ensure easy installation User-friendly instructions eliminate the need to call a hotline for assistance Coated threads for easy installation.Strip 3/8" of insulation from the end of each wire with a proper wire stripping tool Hex Size (Oxygen Sensor): 22 mm