391802B000 Hyundai / KIA SENSOR-CRANKSHAFT POSITION, Price: 23.36$, Weight: 0.09kg

Engine Crank Position Sensor for Hyundai and Kia

Why your engine needs it

This sensor tells the ECU exactly where the crankshaft is and how fast it spins. With that timing data, the ECU controls fuel injection and spark. The result is quick starts, smooth idle, clean emissions, and full power. Without accurate crank data, modern engines cannot run reliably.

How it works

A Hall-effect/magnetic pickup reads a toothed wheel on the crank. Each tooth passing creates a precise signal. The ECU converts this into engine position, then syncs ignition and injection. The unit is sealed against heat and oil, mounted near the crank pulley or block, and uses an O-ring to keep out moisture.

What happens when it fails

Common symptoms: no-start or long cranking, random stalling, rough idle, weak acceleration, poor fuel economy, and MIL on with codes like P0335–P0339. Intermittent failure can mimic fuel issues. Prolonged misfires may harm the catalytic converter.

Pro tips for replacement ✅

Inspect wiring and connector, clean the reluctor, set correct gap, route harness away from exhaust, and torque to spec. Perform CKP relearn if required. Choose OEM-grade for stable hot-starts and long life.

Compatibility

• Elantra
• Avante
• Elantra GT
• i30
• i30 CW
• i20
• i10
• i40
• i45
• Tucson
• ix35
• ix20
• Sonata
• Sonata Hybrid
• Veloster
• Kona
• Venue
• Accent
• Verna
• Solaris
• Creta
• HB20