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Regain Lost Power. A bad oxygen (aka O2) sensor can cause poor performance, lousy fuel economy, the dreaded check engine light, and even to fail emissions testing. So replace those worn out faulty sensors with a brand new OPR Oxygen Sensor for superior, consistent performance.Exceeds OEM Quality. Designed with a waterproof factory-fitted connector to ensure a perfect fit every time, OPR's oxygen sensors meet or exceed OE specifications and are built with the highest quality materials and craftsmanship to ensure a superior quality direct replacement for your worn or failed OEM sensors.Application. This OPR Oxygen Sensor; Front Upstream is designed to fit 1999-2010 Ford Mustang models. Sold individually.

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