This part is a sensor, heated oxygen (position 2) (female connector), for Buick cars. It fits for Buick Lacrosse / Allure, and Regal for the U.S. from 2011 to 2013. It's a genuine General Motors part with an OEM part number 12639693, and a corresponding ACDelco part number 12639693. Please keep in mind that this sensor is interchangeable with 12646200 for the U.S. market since April 1, 2012, and was replaced with 12646200 for Canada market on January 3, 2011.
This sensor has a weight of 3.36 ounces, usually, it comes in a set of 1 item in retail packaging.
This sensor 100% fits for General Motors cars. It's made of top quality materials, it has passed not only all manufacturer's tests but also General Motors quality control and has to endure rough road conditions over a long time.
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