A-tnewb 2PCS 234-5135 234-4488 Oxygen O2 Sensor Compatible with 2007 2008 2009 2010 1.6L Mini Cooper Upstream & Downstream Oxygen Sensor 【Perfect Fit】 The O2 Sensor Compatible with 2007-2010 Mini Cooper 1.6L L4 DOHC / 2009-2010 Mini Cooper 1.6L L4 SOHC 【OEM Replacement】 The Oxygen Sensor Replaces# Upstream & Downstream Oxygen Sensor 234-5135, 234-4488, 11787548961, 17107515499, 2344488, 25198, 7548961 【Main Function】 The Oxygen Sensor helps the engine control system adjust the fuel ratio by monitoring and providing feedback on the oxygen content in the exhaust. This helps improve combustion efficiency and fuel economy, ensuring the normal operation and performance output of the engine. 【High Quality】 Made from high-quality materials, our O2 Sensor has a long lifespan, providing your vehicle with long-term stability and excellent performance. 【Buy with Confidence】 Brand new Oxygen Sensor, professionally tested by professional before shipping. We offer a one-year unlimited-mileage guarantee on our meticulously crafted Oxygen Sensor, ensuring you can hit the road with peace of mind.