Temperature Liquid Level Quality Sensor 801021-1205245 – for Yuchai Engines

Temperature Liquid Level Quality Sensor 801021-1205245 – OEM Yuchai Engine Replacement

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Product Overview

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This sensor combines dual-function monitoring for coolant temperature and liquid level in Yuchai diesel engine cooling systems. Designed to OEM specifications, the 801021-1205245 ensures accurate readings, reduces false alarms, and withstands high-vibration engine environments. Direct replacement for original Yuchai parts – no adapter or wiring modification required.

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Key Features & Benefits

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• Dual sensing – Monitors both temperature and liquid level in a single unit.

• OEM fitment – Identical plug, thread, and electrical characteristics as original Yuchai sensor.

• Wide operating range – -40°C to +125°C with ±1°C accuracy.

• Corrosion-resistant housing – IP67-rated against moisture, dust, and engine fluids.

• Plug-and-play – 3-pin Deutsch connector, no programming needed.

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Technical Specifications

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Compatibility & Applications

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This sensor is a direct fit for Yuchai engines used in:

• Construction machinery (loaders, excavators)

• Agricultural tractors

• Marine propulsion systems

• Stationary generator sets

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Installation & Wiring Guide

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1. Drain coolant to below sensor level.

2. Remove old sensor using a 27mm deep socket.

3. Apply thread sealant to new sensor (do not over-tighten – max 25 Nm).

4. Connect the 3-pin harness:

• Pin 1 – Ground

• Pin 2 – Temperature signal (0–5V)

• Pin 3 – Level switch (NC/NO configurable)

5. Refill coolant and bleed air. Test readings via engine ECU or gauge panel.

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Why Choose This OEM Sensor Over Aftermarket?

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Aftermarket sensors often use lower-grade thermistors and thinner housings, leading to drift after 500 hours. This 801021-1205245 unit is factory-calibrated to Yuchai’s exact resistance curve, ensuring your engine management system receives correct data for fuel timing and fan clutch control – directly impacting fuel efficiency and emissions compliance.