Engine, Coolant, Temperature, Sensor, Coolant Sensor, Temperature Sensor, Temp Sensor Product Features:100% factory resistance calibrated to ensure precision tolerances, resulting in extremely accurate temperature for optimal performanceThread Sealant and/or O-ring pre-installed on applicable sensors to ensure leak free performanceBrass sensor housing precision machined to meet or exceed OE thermal conductivityOE precision matched thermistor position for correct output parametersExtensive product testing includes salt spray, high/low temperature impact, thermal vibration, durability, static electricity, and micro tension, among other tests, to ensure all sensors meet or exceed OEM specifications.