HomeEmission Control > SensorsWalker 250-24129 Oxygen Sensor - Downstream
Part #: 250-24129

Walker 250-24129 Oxygen Sensor - Downstream

Walker Products OE, Downstream
8 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
Walker Products OE, Downstream
Fitment: Mazda, Miata
Easy Returns — Return within 60 days for a full refund
Fast Shipping — Most orders ship same business day before 1pm CST

Overview of Walker Products OE Oxygen Sensor 250-24129

The Walker Products OE Oxygen Sensor 250-24129 is designed specifically for Mazda Miata models, ensuring precise emission control and optimal engine performance. This heated oxygen sensor features a threaded mounting type and a radiused polygon male connector for secure installation.

  • Wiring harness length: 17.24 inches
  • Wire gauge measurement: 20 gauge
  • Heated sensor type for faster response
  • Specific fit for Mazda Miata
  • Four-wire configuration
  • Radiused polygon male connector
  • Thread diameter: 18.0 mm
  • Overall length: 20.79 inches
  • Threaded mounting type

Detailed Product Description

This Walker Products OE oxygen sensor (part number 250-24129) is engineered to meet the exact specifications of Mazda Miata vehicles. The heated sensor type allows for quicker warm-up times, improving fuel efficiency and reducing emissions. With a 20 gauge wire and a four-wire setup, this sensor provides reliable signal transmission to the engine control unit. The radiused polygon male connector ensures a secure and precise connection, while the threaded mounting type with an 18.0 mm thread diameter facilitates straightforward installation. The wiring harness length of 17.24 inches and overall length of 20.79 inches are designed to fit the specific routing requirements of the Mazda Miata exhaust system.

Walker Products OE Brand Line Information

The Walker Products OE line focuses on delivering original equipment quality parts that match or exceed factory specifications. This oxygen sensor is part of that line, providing a direct replacement solution for emission control sensors. The OE designation indicates compatibility and performance aligned with Mazda’s original components, ensuring consistent operation and durability.

Common Applications and Issues Addressed

  • Restores accurate oxygen sensing for proper air-fuel mixture
  • Helps resolve check engine light codes related to oxygen sensors
  • Improves fuel economy by providing precise feedback to the ECU
  • Reduces harmful emissions by maintaining optimal combustion
  • Eliminates rough idling or engine hesitation caused by faulty sensors

Installation Notes and Tips

  • Ensure the vehicle is cool before installation to avoid burns
  • Use appropriate tools for threaded mounting to prevent damage
  • Verify connector type matches the vehicle harness (radiused polygon male)
  • Check wiring harness length and routing to avoid tension or interference
  • Follow Mazda Miata service manual guidelines for sensor replacement

Quality Assurance and Warranty

Walker Products OE oxygen sensors are manufactured to meet strict quality standards, ensuring reliable performance and durability. This part number 250-24129 undergoes rigorous testing to comply with emission control requirements. Warranty coverage details should be confirmed with the product documentation or supplier.

BrandWalker
Part Number250-24129
PositionWalker Products OE, Downstream
Connector GenderMale
Connector ShapeRadiused Polygon
Mounting TypeThreaded
Overall Length20.79
Sensor TypeHeated
Thread Diameter18.0
Universal Or Specific FitSpecific
Wire Gauge Measurement20
Wire Quantity4
Wiring Harness Length17.24

This part fits 8 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
2000MazdaMiata1.8LL4GASDownstreamDownstream oxygen sensor for B1S2, not for vehicles in California.; Walker Products OE
2000MazdaMiata1.8LL4GASDownstreamDownstream Bank 1 Sensor 2 for Non-Calif-ESV vehicles.; Walker Products OE
2000MazdaMiata1.8LL4GASDownstreamDownstream oxygen sensor for second bank, sensor 1, non-California emissions.; Walker Products OE
1999MazdaMiata1.8LL4GASDownstreamDownstream oxygen sensor for B1S2, not for vehicles in California.; Walker Products OE
1999MazdaMiata1.8LL4GASDownstreamDownstream Bank 1 Sensor 2 for Non-Calif-ESV vehicles.; Walker Products OE
1999MazdaMiata1.8LL4GASDownstreamDownstream oxygen sensor for second bank, sensor 1, non-California emissions.; Walker Products OE
1997MazdaMiata1.8LL4GASDownstreamFits downstream bank 1 sensor 2 on specific vehicle models.; Walker Products OE
1996MazdaMiata1.8LL4GASDownstreamFits downstream bank 1 sensor 2 on specific vehicle models.; Walker Products OE

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.