Holstein Engine Coolant Temperature Sensors are direct OE replacements for these critical engine components, offering perfect fit, form, and function for flawless operation that restores your vehicle to factory levels of performance. Precision engineered sensor exactly duplicates the function of the OE component - ensuring smooth, powerful engine performance and maximum fuel economy. Manufactured with premium materials that ensure rugged, long-term performance and the heat resistance necessary to withstand high engine operating temperatures. O-ring or gasket included (where applicable) to ensure proper fit and a tight, leakproof seal. Backed by Holstein's 3 year/36k mile warranty - we believe in our parts and our warranty shows it! Arrives packaged in a Zip-Loc style anti-static bag that protects the electronic circuitry and components.