HomeEmission Control > SensorsWalker 250-24123 Oxygen Sensor - Downstream or Upstream
Part #: 250-24123

Walker 250-24123 Oxygen Sensor - Downstream or Upstream

Walker Products OE, Downstream
18 vehicles fit this part
Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
Walker Products OE, Downstream
Fitment: Mazda, Miata
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Overview of Walker Products OE Oxygen Sensor 250-24123

The Walker Products OE Oxygen Sensor 250-24123 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 female connector for secure installation.

  • Heated oxygen sensor for accurate emissions monitoring
  • Specific fit for Mazda Miata vehicles
  • Threaded mounting with 18.0 mm thread diameter
  • 26.69 inches wiring harness length with 4 wires of 20 gauge
  • Radiused polygon female connector for reliable connection
  • Overall length of 30.24 inches for proper fitment

Detailed Product Description

The Walker Products OE line focuses on providing original equipment quality parts that meet or exceed OEM specifications. The 250-24123 oxygen sensor is a heated sensor type, which allows for faster warm-up times and improved fuel efficiency. It features a 4-wire design with 20 gauge wires, ensuring accurate signal transmission and durability. The sensor’s wiring harness length of 26.69 inches and overall length of 30.24 inches are engineered to fit the Mazda Miata precisely, avoiding common installation issues. The radiused polygon female connector and threaded mounting type with an 18.0 mm thread diameter provide a secure and stable connection to the vehicle’s emission system.

Common Applications and Issues Addressed

  • Helps maintain proper air-fuel mixture for efficient combustion
  • Reduces harmful emissions by accurately monitoring oxygen levels
  • Prevents engine performance problems related to faulty sensors
  • Resolves check engine light triggers caused by oxygen sensor faults
  • Improves fuel economy by providing precise feedback to the engine control unit

Installation Notes and Tips

  • Ensure compatibility with Mazda Miata models before installation
  • Use proper tools to avoid damaging the 18.0 mm threaded sensor
  • Check connector orientation; the radiused polygon female connector must align correctly
  • Inspect wiring harness length to confirm fit within the engine bay
  • Follow vehicle manufacturer torque specifications when mounting

Quality Assurance and Warranty

Walker Products OE parts are manufactured to meet strict quality standards, ensuring reliable performance and durability. The 250-24123 oxygen sensor undergoes rigorous testing to comply with emission control requirements. While specific warranty details may vary, Walker typically offers coverage against defects in materials and workmanship to support long-term use in Mazda Miata vehicles.

BrandWalker
Part Number250-24123
PositionWalker Products OE, Downstream
Connector GenderFemale
Connector ShapeRadiused Polygon
Mounting TypeThreaded
Overall Length30.24
Sensor TypeHeated
Thread Diameter18.0
Universal Or Specific FitSpecific
Wire Gauge Measurement20
Wire Quantity4
Wiring Harness Length26.69

This part fits 18 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
2000MazdaMiata1.8LL4GASUpstreamNon California emissions certified; Bank 1 Sensor 1; Upstream position; Not suitable for California emissionscertified vehicles; Walker Products OE
2000MazdaMiata1.8LL4GASDownstreamDownstream oxygen sensor for B1S2 position in California emissions.; Walker Products OE
2000MazdaMiata1.8LL4GASUpstreamFor vehicles without California and Federal Emissions - Upstream Bank 1 Sensor 1.; Walker Products OE
2000MazdaMiata1.8LL4GASDownstreamDownstream oxygen sensor compatible with California-ESV vehicles in bank 1 position 2.; Walker Products OE
2000MazdaMiata1.8LL4GASUpstreamUpstream oxygen sensor for bank 1 sensor 1 incompatible with California-ESV vehicles.; Walker Products OE
1999MazdaMiata1.8LL4GASUpstreamNon California emissions certified; Bank 1 Sensor 1; Upstream position; Not suitable for California emissionscertified vehicles; Walker Products OE
1999MazdaMiata1.8LL4GASDownstreamDownstream oxygen sensor for B1S2 position in California emissions.; Walker Products OE
1999MazdaMiata1.8LL4GASUpstreamFor vehicles without California and Federal Emissions - Upstream Bank 1 Sensor 1.; Walker Products OE
1999MazdaMiata1.8LL4GASDownstreamDownstream oxygen sensor compatible with California-ESV vehicles in bank 1 position 2.; Walker Products OE
1999MazdaMiata1.8LL4GASUpstreamUpstream oxygen sensor for bank 1 sensor 1 incompatible with California-ESV vehicles.; Walker Products OE
1997MazdaMiata1.8LL4GASUpstreamBank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products OE
1997MazdaMiata1.8LL4GASUpstreamFront oxygen sensor compatible with various vehicle models.; Walker Products OE
1996MazdaMiata1.8LL4GASUpstreamBank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products OE
1996MazdaMiata1.8LL4GASUpstreamFront oxygen sensor compatible with various vehicle models.; Walker Products OE
1995MazdaMiata1.8LL4GASUpstreamBank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products OE
1995MazdaMiata1.8LL4GASUpstreamFront oxygen sensor compatible with various vehicle models.; Walker Products OE
1994MazdaMiata1.8LL4GASUpstreamBank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products OE
1994MazdaMiata1.8LL4GASUpstreamFront oxygen sensor compatible with various 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.