Find Dodge Ram 3500 Pickup Engine Coolant Temperature Sensor Location & Dodge Ram 3500 Pickup Engine Coolant Temperature Sensor. Maintaining the coolant temperature sensor in your Dodge Ram 3500 Pickup is crucial for engine performance and longevity. Regularly check for corrosion and ensure connections are tight to extend the sensor's life; signs like erratic temperature readings or check engine lights often signal the need for replacement. When selecting a new sensor, opt for OEM-quality materials for reliability and compatibility. Brass sensors provide quick response to temperature changes, while plastic sensors offer durability and resistance to corrosion. Correct installation is key—avoid overtightening to prevent damage. Always consult your vehicle's manual to choose the right sensor, ensuring peak performance and fuel efficiency for your Dodge Ram 3500.