Your vehicle deserves only genuine OEM GM parts and accessories. To ensure reliability, purchase GM part # 12656543 Sensor Assembly, Heated Oxygen (Post, Catalyst Bank 1. It is sometimes referred to as GM Oxygen Sensor. Our GM parts and accessories are expedited directly from authorized GM dealers strategically located all across the U.S. and are backed by the manufacturer's 12 month, 12,000 mile warranty. OEM GM parts are the best for restoring your vehicle to factory condition performance. This part fits specific Buick Allure, LaCrosse, Regal models. It fits Chevrolet Impala, Malibu.
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