Water Temperature Semsor

The water temperature sensor is a critical engine management component that monitors coolant temperature and relays real-time data to your vehicle's engine control unit. This OE replacement water temperature sensor is engineered for GM-style applications and delivers the precision needed for proper fuel injection timing, ignition advance, and emissions control. Whether you're troubleshooting a check engine light, replacing a failed sensor on a daily driver, or fine-tuning a modified engine build, a functioning coolant temperature sensor is non-negotiable for drivability and longevity.

Manufactured by FUELTECH USA, this water temperature sensor uses a thermistor that changes electrical resistance in response to coolant temperature variations. As coolant heats up, the sensor's resistance decreases proportionally, allowing the ECU to adjust fuel mixture and spark timing dynamically. The compact design—measuring 2.25 x 1.4 x 2.95 inches and weighing just 0.09 lbs—fits seamlessly into OEM boss locations on GM cylinder heads and intake manifolds. The sensor's durable construction withstands thermal cycling and engine vibration, ensuring stable readings across the full operating temperature range.

This sensor is ideal for GM vehicle owners, restoration shops, and performance builders who demand OEM-equivalent reliability. Common symptoms of sensor failure include erratic idle, poor fuel economy, hard starting, and illuminated malfunction indicator lights—all resolved by installing a quality replacement. Installation requires only a socket wrench and basic hand tools; no special adapters or custom fabrication needed. Compatible with most GM engines from the 1980s through modern LS platforms, the water temperature sensor integrates directly with factory wiring harnesses and requires no recalibration or tuning adjustments.