463863A050 Hyundai / KIA SENSOR-OIL TEMPERATURE, Price: 11.37$, Weight: 0.01kg

Engine Oil Temperature Sensor ?

This sensor is a small but critical input device that helps the ECU “understand” how hot the engine oil is during cold starts, city traffic, towing, or highway runs. Oil temperature matters because it directly affects oil thickness (viscosity), lubrication speed, and overall engine protection.

Why this part is needed

Modern Hyundai/Kia engines use oil temperature data to fine-tune fuel delivery, ignition timing, variable valve control logic, and sometimes cooling fan strategy. Accurate readings help the engine warm up correctly and stay protected under load.

How it works

Inside the sensor is a thermistor (temperature-sensitive resistor). As oil temperature rises, the resistance changes. The ECU reads that change as a temperature signal and adjusts engine management to match real operating conditions.

What happens if it’s broken ❗

• Check Engine Light and stored fault codes
• Hard starting or rough running when cold
• Poor fuel economy and sluggish response
• Cooling strategy or timing control may act “safe mode”
• Long-term risk: increased wear from incorrect warm-up control

Compatibility

• Hyundai Santa Fe
• Hyundai Sonata
• Hyundai Tucson
• Hyundai Grandeur
• Hyundai Azera
• Hyundai Equus
• Hyundai Tiburon
• Hyundai Tuscani
• Hyundai Coupe
• Hyundai Centennial
• Kia Entourage