【FUNCTION】Oxygen sensors, in fact, are divided into two types, front and rear, both of which are installed in the position of the engine exhaust pipe. With three-way catalysis as the boundary, the pre-oxygen sensor before the three-way catalysis and the post-oxygen sensor after the three-way catalysis.Automotive oxygen sensor is a key sensing component in the EFI engine control system, which is a key component to control automobile exhaust emissions, reduce environmental pollution of automobiles, and improve the fuel combustion quality of automobile engines
【COMPATIBLE WITH】These Oxygen Sensors Fit for Hyundai Accent 2012-2017 1.6L L4, for Hyundai Veloster 2012-2017 1.6L L4, for Kia Rio 2012-2018 1.6L - L4, for Kia Soul 2012-2018 1.6L - L4
【OEM DESIGN & DIRECT FIT】Quality materials used, meets OEM standards, have already tested before shipping
【BUY WITH CONFIDENCE】Please check the model and year we listed in the description page to confirm compatibility before purchasing
O2 sensor 1 can also be called the upstream O2 sensor or bank 1 sensor 1. It is after the exhaust manifold and before the catalytic converter. It measures the air-fuel ratio of the exhaust coming out of the exhaust manifold to maintain the 14.7:1 fuel to oxygen ratio. When the O2 sensor has a low voltage (lean) signal, it compensates by increasing the amount of fuel in the mixture. When the O2 sensor has a high voltage (rich) signal, it reduces the amount of fuel the car adds to the mixture.