HomeEmission Control > SensorsWalker 250-23097 Oxygen Sensor - Upstream Front or Upstream Rear
Part #: 250-23097

Walker 250-23097 Oxygen Sensor - Upstream Front or Upstream Rear

Walker Products OE, Upstream Front
⚙️ 10 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
📦Walker Products OE, Upstream Front
🚗Fitment: Mazda, Millenia
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Overview of Walker 250-23097 Oxygen Sensor for Mazda Millenia

The Walker 250-23097 oxygen sensor is designed specifically for the Mazda Millenia, 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.

  • Heated oxygen sensor for accurate emissions monitoring
  • Specific fit for Mazda Millenia models
  • 18.43-inch wiring harness length with 3 wires of 20 gauge
  • Threaded mounting with 18.0 mm thread diameter
  • Radiused polygon male connector for reliable connection
  • Overall length of 21.97 inches for proper fitment

Detailed Product Description

The Walker 250-23097 oxygen sensor is engineered to meet the exact specifications required by Mazda Millenia vehicles. It features a heated sensor type that helps the sensor reach operating temperature quickly, improving fuel efficiency and reducing emissions. The sensor includes a wiring harness length of 18.43 inches with three 20-gauge wires, providing a robust electrical connection. Its radiused polygon male connector ensures a secure and precise fit, while the threaded mounting type with an 18.0 mm thread diameter allows for straightforward installation. The overall length of 21.97 inches accommodates the specific layout of the Mazda Millenia’s emission 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 250-23097, provides reliable performance and durability tailored to specific vehicle applications like the Mazda Millenia.

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 issues related to faulty sensors
  • Resolves check engine light triggers caused by oxygen sensor faults
  • Improves fuel economy by providing precise sensor data

Installation Notes and Tips

When installing the Walker 250-23097 oxygen sensor on a Mazda Millenia, ensure the threaded mounting is properly tightened to the manufacturer’s torque specifications to avoid leaks. The radiused polygon male connector should be securely connected to prevent electrical issues. 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, including part number 250-23097, are manufactured to meet strict quality standards for durability and performance. While specific warranty details may vary, Walker typically offers coverage against defects in materials and workmanship to ensure long-term reliability in emission control applications.

BrandWalker
Part Number250-23097
PositionWalker Products OE, Upstream Front
Connector GenderMale
Connector ShapeRadiused Polygon
Mounting TypeThreaded
Overall Length21.97
Sensor TypeHeated
Thread Diameter18.0
Universal Or Specific FitSpecific
Wire Gauge Measurement20
Wire Quantity3
Wiring Harness Length18.43

This part fits 10 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
2002MazdaMillenia2.3LV6GASUpstream FrontFront upstream oxygen sensor needed for proper functionality near exhaust manifold.; Walker Products OE
2001MazdaMillenia2.3LV6GASUpstream FrontFront upstream oxygen sensor needed for proper functionality near exhaust manifold.; Walker Products OE
2000MazdaMillenia2.3LV6GASUpstream FrontFront upstream oxygen sensor needed for proper functionality near exhaust manifold.; Walker Products OE
1999MazdaMillenia2.3LV6GASUpstream FrontFront upstream oxygen sensor needed for proper functionality near exhaust manifold.; Walker Products OE
1998MazdaMillenia2.3LV6GASUpstream FrontFront upstream oxygen sensor needed for proper functionality near exhaust manifold.; Walker Products OE
1997MazdaMillenia2.3LV6GASUpstream FrontFront upstream oxygen sensor needed for proper functionality near exhaust manifold.; Walker Products OE
1996MazdaMillenia2.5LV6GASUpstream RearUpstream oxygen sensor for rear exhaust system.; Walker Products OE
1996MazdaMillenia2.3LV6GASUpstream FrontFront upstream oxygen sensor needed for proper functionality near exhaust manifold.; Walker Products OE
1995MazdaMillenia2.5LV6GASUpstream RearUpstream oxygen sensor for rear exhaust system.; Walker Products OE
1995MazdaMillenia2.3LV6GASUpstream FrontFront upstream oxygen sensor needed for proper functionality near exhaust manifold.; 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.