Spectra Premium MZ39 Crankshaft Position Sensor Unit is designed to Original Equipment (OE) fit, form and function requirements accomplished by leveraging Spectra Premium's OE engine management systems design expertise Unit is tested for durability through long-cycle thermal shock test (-50 to 300 Degree), ensuring reliability against extreme vibrations All sensors are salt spray tested to ensure the highest possible resistance to corrosion Each new sensor is road tested to ensure real world performance and to verify that each design meets Spectra Premium's high standards for quality Engineered to stringent tolerances based on Spectra Premium's Canadian engineers' in-depth knowledge of the OE part it's designed to replace