Ford Focus Mondeo Escape Engine Coolant Temperature Sensor OEM XU3F12A648AA

Ford Focus 2005–2012, Mondeo 2.0 2003–2008, Escape 2.3 2001–2004 Engine Coolant Temperature Sensor OEM XU3F12A648AA is an important part of the engine cooling system, designed to measure coolant temperature and send a signal to the ECU to control the cooling fan, fuel injection system, and temperature display on the instrument cluster.

During operation, the ECU needs an accurate temperature signal to adjust the fuel ratio and maintain stable engine temperature. If the coolant temperature sensor is inaccurate or damaged, it can cause incorrect temperature readings, abnormal cooling fan operation, increased fuel consumption, hard starting, or engine overheating.

This OEM product is manufactured to quality standards equivalent to the original vehicle part, ensuring accurate temperature measurement, fast response, and high durability in the engine's high-temperature environment. The sensor is suitable for Ford Focus 2005–2012, Ford Mondeo 2.0 2003–2008, and Ford Escape 2.3 2001–2004, ensuring a direct fit and full compatibility with the original system.

In addition to measuring coolant temperature, the sensor also helps the ECU optimize engine performance, improve cooling efficiency, and reduce fuel consumption.

Using a high-quality OEM coolant temperature sensor helps the cooling system operate stably, minimizes overheating issues, and increases engine durability during use.

Product Information
• Product name: Coolant Temperature Sensor / Engine Coolant Temperature Sensor
• Part number: XU3F12A648AA
• Brand: OEM
• Compatible models:
 - Ford Focus 2005–2012
 - Ford Mondeo 2.0 2003–2008
 - Ford Escape 2.3 2001–2004
• System: Engine cooling – ECU
• Condition: New

Functions and role
• Measures engine coolant temperature
• Sends temperature signals to the ECU
• Controls the cooling fan accurately
• Helps optimize fuel injection
• Provides accurate engine temperature warnings

Key benefits
• OEM quality, direct fit compatibility
• Accurate temperature measurement, fast response
• Stable operation in high-heat environments
• Direct fit installation, easy replacement
• High durability, long service life

Signs it needs replacing
• Temperature gauge behaves abnormally
• Radiator fan runs continuously or does not run
• Engine overheating
• Abnormal fuel consumption
• Check Engine light on

👉 The coolant temperature sensor is an important part that helps control engine operating temperature, and should be checked and replaced when signs of failure appear to avoid affecting the cooling system and vehicle performance.

Replacement recommendations
• Check coolant level before replacement
• Clean the connector and mounting area
• Use the correct matching part number
• Check cooling fan operation after replacement
• Top up and bleed the coolant system properly