HomeEmission Control > SensorsWalker 250-54025 Oxygen Sensor - Upstream
Part #: 250-54025

Walker 250-54025 Oxygen Sensor - Upstream

Walker Products OE, Upstream
4 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
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OE Direct Replacement — Bolt-on fit, no modifications needed
Walker Products OE, Upstream
Fitment: Subaru, Baja
Easy Returns — Return within 60 days for a full refund
Fast Shipping — Most orders ship same business day before 1pm CST

Overview of Walker 250-54025 Oxygen Sensor for Subaru Baja

The Walker 250-54025 oxygen sensor is designed specifically for the Subaru Baja, providing precise emission control and engine performance monitoring. This heated oxygen sensor ensures accurate readings for optimal fuel efficiency and reduced emissions.

  • Heated oxygen sensor type for faster response times
  • Specific fitment for Subaru Baja models
  • 35.35 inches wiring harness length for flexible installation
  • 20 gauge wire measurement with 4 wires for reliable signal transmission
  • Radiused polygon male connector for secure connection
  • Threaded mounting type with 18.0 mm thread diameter
  • Overall length of 38.9 inches for proper placement

Detailed Product Description

This Walker Products OE oxygen sensor (part number 250-54025) is engineered to meet the exact specifications of the Subaru Baja. Featuring a heated sensor element, it quickly reaches operating temperature to provide accurate oxygen level readings. The 4-wire design and 20 gauge wiring ensure consistent electrical performance, while the radiused polygon male connector guarantees a secure and precise fit. The threaded mounting type with an 18.0 mm diameter allows for straightforward installation and reliable sensor positioning. With a wiring harness length of 35.35 inches and an overall length of 38.9 inches, this sensor accommodates the specific layout of the Subaru Baja’s emission 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, ensuring compatibility and durability for Subaru Baja vehicles. Walker Products OE parts are designed to integrate seamlessly with existing vehicle systems, providing dependable performance and emission control.

Common Applications and Issues Addressed

  • Restores accurate air-fuel mixture readings for improved engine efficiency
  • Helps resolve check engine light triggers related to oxygen sensor faults
  • Reduces emissions by ensuring proper catalytic converter function
  • Prevents rough idling and poor acceleration caused by faulty sensors
  • Supports fuel economy by maintaining optimal combustion conditions

Installation Notes and Tips

When installing the Walker 250-54025 oxygen sensor on a Subaru Baja, ensure the threaded mounting hole is clean and free of debris. Use anti-seize compound on the sensor threads to facilitate future removal. Verify the connector orientation matches the radiused polygon male connector for a secure fit. Avoid pulling on the wiring harness during installation to prevent damage to the 4-wire assembly.

Quality Assurance and Warranty

Walker Products OE oxygen sensors are manufactured to meet stringent quality standards, ensuring reliable operation and longevity. This part number 250-54025 undergoes rigorous testing to comply with emission control requirements. Warranty coverage details should be confirmed with the parts provider or manufacturer.

BrandWalker
Part Number250-54025
PositionWalker Products OE, Upstream
Connector GenderMale
Connector ShapeRadiused Polygon
Mounting TypeThreaded
Overall Length38.9
Sensor TypeHeated
Thread Diameter18.0
Universal Or Specific FitSpecific
Wire Gauge Measurement20
Wire Quantity4
Wiring Harness Length35.35

This part fits 4 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
2006SubaruBaja2.5LH4GASUpstreamBank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products OE
2006SubaruBaja2.5LH4GASUpstreamFront oxygen sensor compatible with various vehicle models.; Walker Products OE
2004SubaruBaja2.5LH4GASUpstreamBank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products OE
2004SubaruBaja2.5LH4GASUpstreamFront 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.