Maxfavor Upstream Air Fuel Ratio O2 Sensor Oxygen Sensor Fit For BMW 128I 135I 323I 328I 328XI 335I 335IS 335XI 528I 550I 650I X3 X5 Z4 Cylinder 4 5 6 15168 17091 17094 17099 75-4133 234-5138 - MF-R1-OS01611

• 🔧【Applications】OE# 234-5138 15168 17091 17094 17099 75-4133 75-4502 ES11081 Upstream Oxygen Sensor Replacement for BMW 2013-2008 128I,2010-2008 135I,2011-2007 323I,2013-2007 328I,2008-2007 328XI,2010-2007 335I,2013-2011 335IS,2008-2007 335XI,2010-2008 528I,2010-2006 550I 650I Manual Trans Left Side,2012-2007 X3,2010-2007 X5,2015-2006 Z4 Cylinder 4 5 6. 🔧【Advantage】Made of high-quality materials,strong durability,to ensure service life,oxygen sensor can improve engine performance and fuel economy,extend catalytic converter life. 🔧【Cautions】Pls carefully check your vehicle year & make & model with the fitment of Amazon and our description.Pls compare your part with our pictures, it must be completely same.If you have any questions, please email us, we try to answer all email within 24 hours. 🔧【Installation】STEP1. Locate the oxygen sensor position and remove it with socket, STEP2. Compare the new sensor to the old sensor to ensure a proper installation, STEP3. Please clean the threaded port to en sure a proper seal of the new sensor,STEP4.Gently tighten the sensor in order to keep wire free from damage and avoid sensor leakage, STEP5,Reinstail the connecor,try to clear it if the car has diagnostic trouble codes. 🔧【Warranty】1-Year Unlimited Miles Warranty. If the oxygen sensor does not fit your vehicle, we accept return. Please make the item clean and package in good condition.