The crankshaft position sensor communicates the position and speed of the crankshaft to the ECM to ensure proper timing of fuel injection and ignition. NTK's robust circuit board design increases durability and precision-wound, coated-copper windings increase longevity. The magnet size and strength in this sensor is optimized for precise signal output. NTK crank position sensors are 100% thermo-shock and vibration tested to ensure the best performance in extreme conditions.