3490721 Water Temperature Sensor for Perkins 403D15T 404D15 404D22T 403C11

Product Overview

This water temperature sensor monitors engine coolant temperature and sends data to the ECU or gauge for Perkins diesel engines. It is designed for models like the 403D-15T and 404D-22T, helping prevent overheating and ensuring optimal engine performance. A reliable replacement for worn or faulty sensors.

Key Features & Performance

• Direct replacement for Perkins part number 349-0721
• Threaded design for easy installation into the coolant passage
• Sealed against moisture and vibration for long service life
• Provides accurate temperature readings to protect engine from thermal stress
• Meets Perkins OEM specifications for fit and function

Fitment & Compatibility

• Perkins 403D-15T
• Perkins 404D-15
• Perkins 404D-22T
• Perkins 403C-11

Common Uses

• Replacing failed temperature sensors in industrial and agricultural engines
• Restoring proper coolant temperature monitoring for generator sets
• Maintaining engine health in Perkins-powered forklifts and compact equipment

Technical Specifications

• Part Number(s): 349-0721
• Sensor Type: Coolant temperature (NTC thermistor)
• Thread Size: 1/8-27 NPT
• Electrical Connector: 2-pin blade type

Frequently Asked Questions

Q: Will this sensor work on a Perkins 404D-22 without the turbo? A: Yes, it is compatible with 404D-15 and 404D-22T models; the non-turbo 404D may also use this sensor, but confirm thread size is 1/8-27 NPT.

Q: Do I need to drain the coolant before replacing the sensor? A: It is recommended to drain coolant below the sensor level to minimize loss, though some coolant may leak during removal—have a catch pan ready.

Product appearance and specifications may vary slightly by batch. Compatibility may vary by serial number. Verify fitment before purchase.