Walker Products 250-54089 oxygen sensor for the 2009-2012 Nissan Sentra 4-cylinder 2.0L and other vehicles measures the oxygen in the exhaust gas. From that oxygen level it measures combustion efficiency.
A failing sensor may show up as an engine that runs poorly, higher fuel consumption, more exhaust emissions or a lit malfunction indicator light. Before you replace it, rule out physical damage to the wiring harness and connector, and have any stored fault codes read, because those signs can also come from elsewhere.
It is an oxygen sensor replacement for the 2009-2012 Nissan Sentra 4-cylinder 2.0L and also fits the 2011-2014 Nissan Cube 4-cylinder 1.8L and the 2009-2012 Infiniti FX50 V8 5.0L. This listing is one sensor, and the 2009-2012 Nissan Sentra 4-cylinder 2.0L takes one.
Fit and size
Build and materials
Is this the right oxygen sensor for a 2012 Nissan Sentra 4-cylinder 2.0L?
Yes. Walker Products 250-54089 fits the 2009-2012 Nissan Sentra 4-cylinder 2.0L, so a 2012 model is covered.
Is this Walker Products oxygen sensor a wide-band sensor?
Yes. Walker Products 250-54089 is a wide-band air-fuel ratio sensor that determines the oxygen content of the exhaust gas.
Is this oxygen sensor an upstream or downstream sensor?
It is an upstream sensor. The catalog lists it for upstream, upstream left and upstream right positions.
Can a failed oxygen sensor turn on the check engine light?
Yes, it can. A failed sensor may make the engine run poorly, raise fuel consumption or emissions, or light the malfunction indicator light, and newer vehicles store a fault code in the ECU.
What does the coating on this oxygen sensor's electrodes do?
The coating keeps combustion residue and particulates in the exhaust gases from contaminating or eroding the electrode surfaces. The electrodes are made of a gas-permeable platinum layer.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
