Walker Products Oxygen Sensor P/N:250-21051
Walker Products 250-241281 oxygen sensor for the 2019-2025 Mazda MX-5 Miata 4-cylinder 2.0L and other vehicles measures the oxygen content of the exhaust gas. This downstream, narrow-band sensor gives the ECU the diagnostic feedback it needs.
A failing sensor can show up as rough running, higher fuel consumption, higher exhaust emissions or a lit malfunction indicator light. These signs alone don't prove the sensor is the problem; a damaged wiring harness or connector is another common source.
This listing is one direct-fit sensor for the 2019-2025 Mazda MX-5 Miata 4-cylinder 2.0L and the 2019-2021 Mazda CX-3 4-cylinder 2.0L, and each takes one.
Fit and size
Build and materials
Is this the downstream oxygen sensor for a 2019-2025 Mazda MX-5 Miata 4-cylinder 2.0L?
Yes. Walker Products 250-241281 is a downstream direct-fit sensor for the 2019-2025 Mazda MX-5 Miata 4-cylinder 2.0L and the 2019-2021 Mazda CX-3 4-cylinder 2.0L.
Is this Walker Products oxygen sensor narrow-band or wideband?
Narrow-band. Walker Products 250-241281 is a 4-wire narrow-band oxygen sensor with a direct-fit design.
What protects the electrodes on this oxygen sensor?
A coating protects the electrode surfaces from contamination and erosion by combustion residue and particulates in the exhaust gases. The electrodes use a gas-permeable platinum layer.
Will a failing oxygen sensor store a fault code?
Yes, newer vehicles store fault codes in the ECU, and some relate to the affected sensor and its systems. A shop can read them with a scan tool.
Is this oxygen sensor made for one specific position?
Yes. Walker Products 250-241281 is made for its specific application and a downstream position, and it supplies the diagnostic feedback the ECU requires.
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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.