391902G000 Hyundai / KIA WHEEL-CRK/SHF POSITION SENSOR, Price: 23.86$, Weight: 0.25kg

Engine Position Sensor for Hyundai & Kia ⚙️

This sensor is a key input for the ECU to know exactly where the crankshaft is and how fast it spins. The engine needs this signal to time ignition and fuel injection correctly, especially during starting, idling, and hard acceleration. Without accurate position data, modern engines simply can’t run smoothly.

How it works ?

The sensor reads a trigger wheel on the crankshaft. As the wheel teeth pass by, it creates a precise pulse pattern. The ECU uses these pulses to calculate RPM and crank position, then fires coils and injectors at the right moment. This keeps combustion stable, power strong, and emissions under control.

What happens if it fails ❗

A weak or broken sensor may cause long cranking, random stalling, misfires, loss of power, poor fuel economy, or a no-start condition. In many cases the check engine light comes on, and the ECU may cut fuel/spark for protection. Ignoring it can leave you stranded and may stress the catalytic converter due to unburned fuel.

Compatible Models ✅

• Sonata
• Sonata Yf
• Sonata Nf
• Sonata Hybrid
• Sonata/I45
• I45
• Santa Fe
• Tucson
• Ix35
• Ix35/Tucson
• Grandeur Tg
• Grandeur Hg
• Grandeur Hybrid
• Azera