To ensure reliability, purchase GM part # 91177408 Sensor, Oxygen (On Illus). It is sometimes referred to as Pontiac Oxygen 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 Pontiac Sunrunner models.
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