To ensure reliability, purchase GM part # 10456019 Knock, Sensor O/L. It is sometimes referred to as Buick Crankshaft Position Sensor, Buick Knock Sensor. Directly from GM, genuine parts are superb with regards to quality, longevity, and fit. Every single part passed stringent quality testing, so you can be sure that it's safe, durable, and built to perform like your original parts. This part fits specific Buick Century, Lesabre, Regal models.
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