Walker Products 250-241255 oxygen sensor for the 2019-2024 Nissan Altima 4-cylinder 2.0L, the 2022-2026 Altima 4-cylinder 2.5L and other vehicles measures the oxygen content of the exhaust gas to monitor the air-fuel ratio. It is a narrow-band, 4-wire direct-fit sensor made for its specific application and downstream position.
- Electrodes made of a gas-permeable platinum layer
- Measures oxygen levels to help fine-tune the air-fuel mixture for fuel economy
- Electrode coating prevents contamination and erosion of the surfaces by combustion residue and particulates in the exhaust gases
- Monitors exhaust gases to help reduce pollutants
- Provides the diagnostic system feedback the ECU requires for its application
Quick facts
- Part: Walker Products 250-241255 oxygen sensor
- Fits: the 2019-2024 Nissan Altima 4-cylinder 2.0L, the 2022-2026 Altima 4-cylinder 2.5L and other vehicles
- Position: Downstream; downstream left, right, front or rear
- Condition: New
A failed sensor might make the engine run poorly, raise fuel consumption or exhaust emissions, or turn on the malfunction indicator light. Those signs can mean the sensor is worn, though a damaged wiring harness or connector can be behind them too, so inspect both for physical damage with the engine off and cool before replacing the sensor.
Fits
This downstream oxygen sensor is a direct-fit sensor for the 2019-2024 Nissan Altima 4-cylinder 2.0L, the 2022-2026 Altima 4-cylinder 2.5L, the 2020-2025 Nissan Sentra 4-cylinder 2.0L and the 2020 Nissan Pathfinder V6 3.5L, among other vehicles. Not sure about your car? Look it up by year and engine in the "Vehicles it fits" section.
Specifications
Fit and size
- Position: Downstream; downstream left, right, front or rear
- Quantity per vehicle: 1
- Number of wires: 4
Build and materials
- Type: Narrow-band, direct fit
- Electrodes: gas-permeable platinum layer
- Condition: New
In the box
This listing is one oxygen sensor, and the fitment calls for one per vehicle.
Frequently Asked Questions
Is this the right oxygen sensor for a 2020-2025 Nissan Sentra 4-cylinder 2.0L?
Yes. Walker Products 250-241255 is listed for the 2020-2025 Nissan Sentra 4-cylinder 2.0L, and the fitment calls for one sensor per vehicle in the downstream position.
Is this the right oxygen sensor for a 2020 Nissan Pathfinder V6 3.5L?
Yes. Walker Products 250-241255 fits the 2020 Nissan Pathfinder V6 3.5L as a downstream oxygen sensor, with one needed per vehicle.
What does this Walker Products oxygen sensor measure?
It determines the oxygen content of the exhaust gas and monitors the air-fuel ratio for combustion efficiency, giving the ECU the feedback its application requires.
Is the 250-241255 oxygen sensor narrow-band or wideband?
It is a narrow-band, 4-wire direct-fit sensor. Its electrodes are made of a gas-permeable platinum layer, and a coating protects the electrode surfaces from combustion residue and particulates.
Can a bad oxygen sensor turn on the check engine light?
Yes. A failed sensor might light the malfunction indicator light, make the engine run poorly or raise fuel consumption and exhaust emissions. A shop can read the stored fault codes.
