HOP Buick GL8/New Century Crankshaft Position Sensor 10456555/10457661 Dual Number Compatible

Buick GL8 and Saturn models’ crankshaft position sensor, OEM numbers 10456555 / 10457661, HOP dual-number compatible. Installed on the engine block near the crankshaft flywheel, it monitors crank speed and position in real time and transmits signals to the ECU to precisely control ignition timing and injection timing. Installation difficulty is moderate; estimated labor 0.5–1 hour; requires adjustment of sensor-to-flywheel gap. If starting difficulties, rough idle, or check engine light on, the sensor signal may be out of spec.