MIROZO Oxygen O2 Sensor Set for Chevy/GMC 5.3L V8 03-05 - Upstream Downstream Left Right (4pcs) Review

TIPS: If you are not sure whether this product is suitable for your model, please check detail page, or inform us your vehicle part number to let us check for you.Oxygen (O2) Sensors commonly fail due to contamination. When checking or replacing an O2 Sensor, visually inspect the sensor body to determine if it has been contaminated by a faulty part or substance upstream, and correct the fault before replacing the sensor. FEATURES OF THE MIROZO OXYGEN SENSOR - Internal Ceramic Insulation for optimal sensor performance; Laser welded sensor body to keep out contaminants; Dual Insulated Protective Cover Prevents premature zirconium sensor wear; Sealed wire leads prevent moisture interference with electronic signal. ADVANTAGES OF THE MIROZO OXYGEN SENSOR: Improve Engine Response & Performance; Save money in fuel costs; Reduce harmful emissions; Prevent premature failure of the catalytic converter. An OBD Scan Tool will usually identify Oxygen (O2) Sensors by the Bank Number (B1 = Bank 1; B2 = Bank 2) and Sensor Number (S1 = Sensor 1; S2 = Sensor 2, etc.). Bank 1 is not on the same side of the engine for every vehicle. Bank 2 refers to the bank opposite Bank 1. Sensor 1 refers to the sensor before the catalytic converter. Other Terms: Upstream Sensor, Pre-Cat Sensor. Sensor 2+ typically refers to the sensor(s) after the catalytic converter. Other Terms: Downstream Sensor, Post-Cat Sensor. FITMENT: 2003-2005 for Cadillac Escalade 5.3L, 2003-2005 for Chevrolet Avalanche 1500 5.3L, 2003-2005 for Chevrolet Silverado 1500 5.3L, 2003-2005 for Chevrolet Suburban 1500 5.3L, 2003-2005 for Chevrolet Tahoe 5.3L, 2003-2005 for GMC Sierra 1500 5.3L, 2003-2005 for GMC Yukon 5.3L, 2003-2005 for GMC Yukon XL 1500 5.3L.