AZ35440 622817 John Deere Coolant Temp Sensor

The **AZ35440 622817 coolant temperature sensor** is a robust, direct-fit replacement designed for John Deere engines including the 4239D, 4239T, CD30290DF, 2755, 2355, 324H, 605C, and models with 2.9L-3029, 3.9L-4039, 4.5L-4045, and 6.8L-6068 engines. Built with a heavy-duty **metal-plastic construction**, it resists corrosion, high temperatures, and engine fluid damage, ensuring long-term reliability in demanding agricultural and industrial applications.

The sensor features a **high-accuracy NTC thermistor**, which provides precise real-time coolant temperature readings to the vehicle’s ECU. This ensures stable engine performance by delivering accurate data for optimal fuel efficiency, cooling system regulation, and diagnostics. Installation is straightforward—this sensor is a **direct plug-and-play replacement**, matching the original thread and requiring no additional modifications, cutting or adjustments.

Each unit undergoes **factory inspection** and is backed by a **quality warranty**, offering peace of mind for farmers, contractors, and fleet managers. Compatible with multiple John Deere engine variants, it eliminates the need for custom fittings or adapters, making it a hassle-free solution for maintenance and repairs.