Walker Products 250-241074 oxygen sensor for the 2014-2018 Mazda 3 4-cylinder 2.0L or 2.5L and other vehicles measures the oxygen in the exhaust gas to show how efficiently the engine burns fuel. It passes the feedback the ECU needs for its diagnostics.
- Measures oxygen levels so the air-fuel mixture can be fine-tuned for fuel economy
- Monitors exhaust gases to help reduce pollutants
- Coating protects the electrode surfaces from contamination and erosion by combustion residue and particulates in the exhaust gas
- Electrodes made of a gas-permeable platinum layer
- Narrow-band sensor with 4 wires
Quick facts
- Part: Walker Products 250-241074 oxygen sensor
- Fits: 2014-2018 Mazda 3 4-cylinder 2.0L or 2.5L and other vehicles
- Position: Downstream
- Condition: New
A failing sensor can make the engine run poorly, raise fuel consumption and exhaust emissions, or light the malfunction indicator light. A damaged wiring harness or connector can be behind those signs too, so inspect both with the engine off and cool and find the cause before buying a sensor.
Fits
This downstream sensor is an oxygen sensor replacement for the 2014-2018 Mazda 3 4-cylinder 2.0L or 2.5L, the 2014-2021 Mazda 6 4-cylinder 2.5L and the 2019-2025 Mazda CX-5 4-cylinder 2.5L, along with other vehicles. If your car is not named here, open the "Vehicles it fits" section to check your exact model and engine.
Specifications
Fit and size
- Position: Downstream
- Quantity per vehicle: 1
Build and materials
- Type: Narrow-band, 4 wires
- Electrodes: gas-permeable platinum layer
- Coating: protects the electrode surfaces
- Condition: New
In the box
One oxygen sensor. The fitment lists a quantity of one per car, so this listing covers the car.
Product information is for general reference and may contain errors. See our Disclaimer.
Frequently Asked Questions
Does this oxygen sensor fit the 2014-2021 Mazda 6 4-cylinder 2.5L, and is it the downstream one?
Yes. Walker Products 250-241074 is listed for the 2014-2021 Mazda 6 4-cylinder 2.5L as a downstream sensor, one per car.
Can I use this oxygen sensor on the 2019-2025 Mazda CX-5 4-cylinder 2.5L?
Yes. Walker Products 250-241074 is listed for the 2019-2025 Mazda CX-5 4-cylinder 2.5L, one sensor per car. For another year or engine, open the "Vehicles it fits" section and check your exact model.
What does the coating on this Walker Products oxygen sensor protect?
The coating protects the electrode surfaces from contamination and erosion by combustion residue and particulates in the exhaust gas. The electrodes use a gas-permeable platinum layer.
Is this oxygen sensor wide-band or narrow-band?
This oxygen sensor is a narrow-band, 4-wire sensor made for the downstream position. It determines the oxygen content of the exhaust gas to monitor the air-fuel ratio.
Can a failed downstream oxygen sensor turn on the check engine light?
Yes, a failed sensor can light the malfunction indicator light, and newer vehicles may store a fault code in the ECU that relates to the sensor. A shop can read those codes.
