Walker 250-241281 Oxygen Sensor - Downstream
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Walker
 OE Base Sensor

Walker 250-241281 Oxygen Sensor - Downstream

Brand Walker 250-241281
Position Downstream
Product line OE Base Sensor
Fits Mazda · 11 vehicles

OE replacement. Engineered to match original equipment sensor performance.

Oxygen sensor for precise ECU feedback and emissions control.

Walker Products OE. Trusted engine management brand since 1946.

$95.08Free shipping
In stock · usually ships same day before 1pm CST
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Step 2 — Quantity
Order total $95.08
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.
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Walker OE Oxygen Sensor for Mazda Applications

Walker Products OE oxygen sensor Part Number 250-241281 is an OE-style replacement built for specific downstream applications. It is engineered to provide the ECU with the diagnostic feedback needed for proper fuel control and emissions monitoring on select Mazda models.

Key Features

  • OE replacement oxygen sensor from Walker Products OE
  • Designed for downstream bank 1 sensor 2 locations on listed applications
  • Built for vehicle-specific fitment and ECU feedback requirements
  • Supports emissions system monitoring on Mazda MX-5 Miata and CX-3 applications
  • Walker Products Part Number 250-241281

Application Details

Compatible With 2022-2025 Mazda MX-5 Miata, downstream OE base sensor. Compatible With 2019-2021 Mazda CX-3, downstream bank 1 sensor 2 on specific vehicle models. Compatible With 2019-2021 Mazda MX-5 Miata, downstream bank 1 sensor 2 on specific vehicle models. Walker Products OE focuses on application-specific engine management sensors, and this oxygen sensor follows that approach for direct-fit replacement needs. The part number 250-241281 is intended for vehicles that require accurate exhaust feedback to the ECU for emissions and drivability control.

What It Helps Address

  • Check engine light related to oxygen sensor performance
  • Poor engine operation caused by incorrect exhaust feedback
  • Increased fuel consumption from inaccurate air-fuel data
  • Higher exhaust emissions from a failing downstream sensor
  • Stored ECU fault codes tied to the affected sensor circuit

Installation Notes and Tips

Before replacement, inspect the sensor wiring harness and connector for heat damage, corrosion, or physical wear. Confirm the vehicle’s sensor position and bank designation against the original part and service information before installation. After installation, clear fault codes and verify that the ECU completes its readiness checks.

Quality Assurance

Walker Products manufactures engine management sensors as OE replacement parts and operates under Automotive ISO9001/TS 16949 quality systems. Since 1946, the brand has supplied oxygen and air-fuel sensors for vehicle-specific applications. Part Number 250-241281 reflects that OE-focused approach for Mazda MX-5 Miata and CX-3 fitments.

Related reading

This part fits 11 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelSubmodelLitersCylindersFuel TypePositionNotes
2024MazdaMX-5 Miata—2.0LL4—DownstreamOE Base Sensor
2023MazdaMX-5 Miata—2.0LL4—DownstreamOE Base Sensor
2022MazdaMX-5 Miata—2.0LL4—DownstreamOE Base Sensor
2021MazdaCX-3—2.0LL4GASDownstreamFits downstream bank 1 sensor 2 on specific vehicle models.; Walker Products OE
2021MazdaMX-5 Miata—2.0LL4GASDownstreamFits downstream bank 1 sensor 2 on specific vehicle models.; Walker Products OE
2020MazdaCX-3—2.0LL4GASDownstreamFits downstream bank 1 sensor 2 on specific vehicle models.; Walker Products OE
2020MazdaMX-5 Miata—2.0LL4GASDownstreamFits downstream bank 1 sensor 2 on specific vehicle models.; Walker Products OE
2019MazdaCX-3Touring2.0LL4GASDownstreamFits downstream bank 1 sensor 2 on specific vehicle models.; Walker Products OE
2019MazdaCX-3Sport2.0LL4GASDownstreamFits downstream bank 1 sensor 2 on specific vehicle models.; Walker Products OE
2019MazdaCX-3Grand Touring2.0LL4GASDownstreamFits downstream bank 1 sensor 2 on specific vehicle models.; Walker Products OE
2019MazdaMX-5 Miata—2.0LL4GASDownstreamFits downstream bank 1 sensor 2 on specific vehicle models.; Walker Products OE