Oxygen Sensor for 2000-2001 Nissan Altima & More - Walker 250-23121

Walker Products 250-23121 oxygen sensor for the 2000-2001 Nissan Altima 4-cylinder 2.4L and other vehicles reads the oxygen content of the exhaust gas. It is a direct-fit narrow-band sensor made for its specific application and position, and it gives the ECU the diagnostic feedback it needs.

• Electrodes made of a gas-permeable platinum layer
• Monitors exhaust gases to help reduce pollutants
• Measures oxygen levels to fine-tune the air-fuel mixture and support fuel economy
• Coating protects electrode surfaces from contamination and erosion by combustion residue and exhaust particulates

Quick facts

• Part: Walker Products 250-23121 oxygen sensor
• Fits: 2000-2001 Nissan Altima 4-cylinder 2.4L and other vehicles
• Position: Upstream
• Condition: New

Rough running, higher fuel use, more exhaust emissions or a lit malfunction indicator light can mean the sensor is failing, but a damaged wiring harness or connector can be behind them as well, so look both over for physical damage first.

Fits

The vehicles it fits include the 2000-2001 Nissan Altima 4-cylinder 2.4L and the 2000-2001 Nissan Sentra 4-cylinder 1.8L, and each takes one. It also works as a Nissan Frontier oxygen sensor for 2001 models with the 4-cylinder 2.4L, where it takes one as well. If your car is not one of these, look up its year and engine in the "Vehicles it fits" section.

Specifications