Walker Products 250-23159 oxygen sensor for the 2001 Nissan Altima 4-cylinder 2.4L and other vehicles measures the oxygen content of the exhaust gas. It is made for its specific application and fitment position, and it gives the ECU the diagnostic feedback it needs.
A failing sensor can show up as rough running, higher fuel use or a lit check engine light. These signs alone do not prove the sensor is at fault; a vacuum leak is another common source. Also look over the wiring harness and connector for physical damage. This listing is one sensor, and the engine takes a single upstream sensor.
Listed for a wide range of Nissan and Infiniti models, this direct-fit oxygen sensor covers the 2001 Nissan Altima 4-cylinder 2.4L, the 2002-2004 Nissan Frontier 4-cylinder 2.4L and the 2002-2004 Nissan Xterra 4-cylinder 2.4L. Open the "Vehicles it fits" section to check your exact model and engine.
Fit and size
Build and materials
Is this the Nissan Xterra oxygen sensor for the 2002-2004 model with the 4-cylinder 2.4L?
Yes. Walker Products 250-23159 is listed for the 2002-2004 Nissan Xterra 4-cylinder 2.4L, in the upstream position, and the engine takes one.
Will a Nissan Frontier oxygen sensor like this one suit the 2002-2004 Frontier with the 4-cylinder 2.4L?
Yes. This sensor is listed for the 2002-2004 Nissan Frontier 4-cylinder 2.4L as an upstream oxygen sensor.
Is this Walker Products oxygen sensor narrow-band or wideband?
Walker Products 250-23159 is a narrow-band oxygen sensor with 3 wires. It measures the oxygen content of the exhaust gas.
What can a failing oxygen sensor look like, and what can I check by eye?
Rough running, higher fuel use or a check engine light can be signs. With the engine off and cool, inspect the sensor, wiring harness and connector for physical damage.
Is this sensor upstream or downstream, and what does its coating do?
This sensor is upstream. Its electrode coating resists contamination and erosion from combustion residue and particulates in the exhaust gases.
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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.
