HomeEmission Control > SensorsWalker 250-54039 Oxygen Sensor - Upstream
Part #: 250-54039

Walker 250-54039 Oxygen Sensor - Upstream

Walker Products OE, Upstream
⚙️ 6 vehicles fit this part
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Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
📦Walker Products OE, Upstream
🚗Fitment: Mazda, 6
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST

Overview of Walker 250-54039 Oxygen Sensor for Mazda 6

The Walker 250-54039 oxygen sensor is designed specifically for Mazda 6 models, providing precise emission control and engine performance monitoring. This heated oxygen sensor features a threaded mounting type and a radiused polygon male connector for secure installation.

  • Heated oxygen sensor with 4 wires for accurate readings
  • Specific fitment for Mazda 6 ensuring compatibility
  • 22.17-inch wiring harness length for flexible installation
  • Threaded mounting with 18.0 mm thread diameter
  • Radiused polygon male connector for reliable connection
  • Wire gauge measurement of 20 for durability and signal integrity
  • Overall length of 25.71 inches for proper placement

Detailed Product Description

The Walker 250-54039 oxygen sensor is engineered to meet the exact specifications required by Mazda 6 vehicles. As a heated sensor, it quickly reaches operating temperature to provide accurate oxygen level readings, which are critical for optimal fuel mixture and emissions control. The sensor includes a 22.17-inch wiring harness and four wires with a 20-gauge measurement, ensuring reliable electrical performance. Its radiused polygon male connector and threaded mounting type with an 18.0 mm thread diameter allow for a secure and precise fit. The overall length of 25.71 inches accommodates proper sensor placement within the exhaust system.

Walker Products OE Brand Line

This oxygen sensor is part of the Walker Products OE line, which focuses on delivering original equipment quality parts designed to meet or exceed factory specifications. The Walker Products OE line ensures that each sensor, including the 250-54039, provides consistent performance and durability tailored to specific vehicle applications like the Mazda 6.

Common Applications and Issues Addressed

  • Maintains proper air-fuel ratio for efficient engine operation
  • Helps reduce harmful emissions by monitoring exhaust gases
  • Prevents engine performance issues related to faulty oxygen sensors
  • Supports smooth idling and acceleration by providing accurate sensor data
  • Assists in avoiding check engine light triggers related to emission control

Installation Notes and Tips

When installing the Walker 250-54039 oxygen sensor on a Mazda 6, ensure the threaded mounting is properly tightened to the manufacturer’s torque specifications to avoid exhaust leaks. The radiused polygon male connector should be securely connected to the vehicle’s wiring harness to maintain signal integrity. It is recommended to inspect the wiring harness for any damage before installation and to use anti-seize compound on the threads if specified by the vehicle manufacturer.

Quality Assurance and Warranty

Walker Products OE oxygen sensors are manufactured to meet stringent quality standards, ensuring reliable performance and longevity. The 250-54039 part number undergoes rigorous testing to comply with emission control requirements. Warranty coverage details should be confirmed with the product documentation or supplier.

BrandWalker
Part Number250-54039
PositionWalker Products OE, Upstream
Connector GenderMale
Connector ShapeRadiused Polygon
Mounting TypeThreaded
Overall Length25.71
Sensor TypeHeated
Thread Diameter18.0
Universal Or Specific FitSpecific
Wire Gauge Measurement20
Wire Quantity4
Wiring Harness Length22.17

This part fits 6 vehicles. Search below:

YearMakeModelSubmodelTransmissionLitersCylindersFuel TypePositionNotes
2008Mazda6Automatic2.3LL4GASUpstreamCompatible with California-ESV vehicles, Upstream Oxygen Sensor; Walker Products OE
2008Mazda6Automatic2.3LL4GASUpstreamCalifornia emissions ESV vehicles oxygen sensor; Walker Products OE
2007Mazda6Automatic2.3LL4GASUpstreamCompatible with California-ESV vehicles, Upstream Oxygen Sensor; Walker Products OE
2007Mazda6Automatic2.3LL4GASUpstreamCalifornia emissions ESV vehicles oxygen sensor; Walker Products OE
2006Mazda6iAutomatic2.3LL4GASUpstreamCompatible with California-ESV vehicles, Upstream Oxygen Sensor; Walker Products OE
2006Mazda6iAutomatic2.3LL4GASUpstreamCalifornia emissions ESV vehicles oxygen sensor; 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.