Walker Products 250-54127 oxygen sensor for the 2019-2026 Nissan Altima 4-cylinder 2.5L and other vehicles checks the exhaust gas for oxygen so the engine computer can judge combustion efficiency. Made for its specific application and fitment position, it gives the ECU the diagnostic feedback it requires.
- Electrodes made of a gas-permeable platinum layer
- Coating protects the electrode surfaces from contamination and erosion by combustion residue and particulates in the exhaust gases
- Monitors exhaust gases to help reduce pollutants
- Oxygen readings help fine-tune the air-fuel mixture and monitor the air-fuel ratio, which supports fuel economy
Quick facts
- Part: Walker Products 250-54127 oxygen sensor
- Fits: 2019-2026 Nissan Altima 4-cylinder 2.5L and other vehicles
- Position: Upstream, upstream left, upstream right, upstream rear, upstream front
- Condition: New
A worn sensor can show up as rough running, higher fuel consumption, more exhaust emissions or a lit malfunction indicator light, though damage to the wiring harness or connector may be behind them, so inspect both for physical damage before replacing the sensor.
Fits
This Walker Products oxygen sensor fits a wide range of Nissan and Infiniti models, including the 2022-2026 Nissan Pathfinder V6 3.5L. It is also an oxygen sensor for the 2022-2023 Nissan Maxima V6 3.5L. If your car is not named here, look it up in the "Vehicles it fits" section before you order.
Specifications
Fit and size
- Position: upstream, upstream left, upstream right, upstream rear, upstream front
- Quantity per application: 1
- Wires: 5
- Connector: rectangular, female, with 4 male pin terminals
Build and materials
- Sensor type: wide-band, heated
- Electrodes: gas-permeable platinum layer with a protective coating
- Condition: New
- Country of origin: United States
In the box
One oxygen sensor. The 2019-2026 Nissan Altima 4-cylinder 2.5L takes one.
Product information is for general reference and may contain errors. See our Disclaimer.
Frequently Asked Questions
Is the Walker Products 250-54127 an oxygen sensor for the 2022-2026 Nissan Pathfinder V6 3.5L?
Yes. Walker Products 250-54127 is listed for the 2022-2026 Nissan Pathfinder V6 3.5L, and the fitment calls for one sensor per application.
Is this wide-band oxygen sensor a sensor for the 2019-2026 Nissan Altima 4-cylinder 2.5L?
Yes. Walker Products 250-54127 is listed for the 2019-2026 Nissan Altima 4-cylinder 2.5L. For any other vehicle, look up your car in the "Vehicles it fits" section.
How many wires and what kind of connector does this wide-band oxygen sensor have?
This heated wide-band oxygen sensor has five wires and a rectangular female connector with four male pin terminals.
Which warning signs can come from a worn oxygen sensor, and how do fault codes fit in?
Rough running, higher fuel consumption or a lit malfunction indicator light can mean a sensor is worn. Newer vehicles store related fault codes in the ECU, and a shop can read them.
What does the coating on the Walker Products 250-54127 electrodes do?
The electrodes are made of a gas-permeable platinum layer. The coating keeps combustion residue and particulates in the exhaust gases from contaminating or eroding the electrode surfaces.
