HomeEmission Control > SensorsWalker 250-23085 Oxygen Sensor - Upstream
Part #: 250-23085

Walker 250-23085 Oxygen Sensor - Upstream

Walker Products OE, Upstream
⚙️ 23 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 and Kia, 626, Protege, Sephia, and MX-3
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Overview of Walker 250-23085 Oxygen Sensor

The Walker 250-23085 oxygen sensor is designed specifically for select Kia and Mazda models, including the Kia Sephia and Mazda Protege. This heated oxygen sensor ensures accurate emissions control and optimal engine performance by monitoring exhaust gases effectively.

  • Heated sensor type for faster response times
  • Specific fit for Kia 626, Mazda MX-3, Protege, and Sephia models
  • 12.32-inch wiring harness length with 3 wires of 20 gauge
  • Threaded mounting type with 18.0 mm thread diameter
  • Radiused polygon female connector for secure connection
  • Overall length of 15.87 inches for proper installation

Detailed Product Features and Specifications

This oxygen sensor from Walker Products OE is engineered with a 20-gauge wire and a 12.32-inch wiring harness length, providing reliable electrical connectivity. The heated sensor type allows the unit to reach operating temperature quickly, improving fuel efficiency and reducing emissions. The sensor features a radiused polygon female connector, ensuring a precise and secure fit with the vehicle’s wiring harness. Its threaded mounting type with an 18.0 mm diameter thread guarantees compatibility with the exhaust system of the specified Kia and Mazda models.

Walker Products OE Line Information

The Walker Products OE line focuses on delivering original equipment quality parts that meet or exceed factory specifications. The 250-23085 oxygen sensor is part of this line, ensuring it matches the performance and durability standards required for Kia and Mazda vehicles. This product line is designed to provide reliable emission control components that integrate seamlessly with the vehicle’s existing systems.

Common Applications and Problem Resolution

  • Restores accurate oxygen sensing for proper air-fuel mixture
  • Helps resolve check engine light issues related to oxygen sensors
  • Improves fuel economy by ensuring efficient combustion
  • Reduces harmful emissions by maintaining proper sensor function
  • Prevents engine performance problems caused by faulty sensors

Installation Notes and Tips

When installing the Walker 250-23085 oxygen sensor, ensure the vehicle is compatible with the part by verifying the make and model, such as Kia Sephia or Mazda Protege. Use appropriate tools to avoid damaging the threaded mounting. Confirm the connector matches the radiused polygon female type for a secure electrical connection. It is recommended to replace the sensor when the engine is cool to prevent injury and ensure proper torque application.

Quality Assurance and Warranty

Walker Products OE oxygen sensors are manufactured to meet strict quality standards, ensuring durability and reliable performance. While specific warranty details for part number 250-23085 should be confirmed with the supplier, Walker typically offers coverage against defects in materials and workmanship to support long-term use in Kia and Mazda vehicles.

BrandWalker
Part Number250-23085
PositionWalker Products OE, Upstream
Connector GenderFemale
Connector ShapeRadiused Polygon
Mounting TypeThreaded
Overall Length15.87
Sensor TypeHeated
Thread Diameter18.0
Universal Or Specific FitSpecific
Wire Gauge Measurement20
Wire Quantity3
Wiring Harness Length12.32

This part fits 23 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
1999Mazda6262.0LL4GASUpstreamCompatible with California-ESV vehicles, Upstream Oxygen Sensor; Walker Products OE
1999Mazda6262.0LL4GASUpstreamCalifornia emissions ESV vehicles oxygen sensor; Walker Products OE
1998Mazda6262.0LL4GASUpstreamCompatible with California-ESV vehicles, Upstream Oxygen Sensor; Walker Products OE
1998Mazda6262.0LL4GASUpstreamCalifornia emissions ESV vehicles oxygen sensor; Walker Products OE
1998MazdaProtege1.5LL4GASUpstreamBank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products OE
1998MazdaProtege1.5LL4GASUpstreamFront oxygen sensor compatible with various vehicle models.; Walker Products OE
1997KiaSephia1.6LL4GASUpstreamBank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products OE
1997KiaSephia1.6LL4GASUpstreamFront oxygen sensor compatible with various vehicle models.; Walker Products OE
1997MazdaProtege1.5LL4GASUpstreamBank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products OE
1997MazdaProtege1.5LL4GASUpstreamFront oxygen sensor compatible with various vehicle models.; Walker Products OE
1996KiaSephia1.6LL4GASUpstreamBank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products OE
1996KiaSephia1.6LL4GASUpstreamFront oxygen sensor compatible with various vehicle models.; Walker Products OE
1996MazdaProtege1.5LL4GASUpstreamBank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products OE
1996MazdaProtege1.5LL4GASUpstreamFront oxygen sensor compatible with various vehicle models.; Walker Products OE
1995KiaSephia1.6LL4GASUpstream3-wire upstream oxygen sensor compatible with Bank 1 Sensor 1.; Walker Products OE
1995KiaSephia1.6LL4GASUpstream3-wire upstream oxygen sensor for bank 1 sensor 1.; Walker Products OE
1995KiaSephia1.6LL4GASUpstreamUpstream 3-wire oxygen sensor for Bank 1 Sensor 1; Walker Products OE
1995MazdaMX-31.6LL4GASUpstreamBank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products OE
1995MazdaMX-31.6LL4GASUpstreamFront oxygen sensor compatible with various vehicle models.; Walker Products OE
1995MazdaProtege1.5LL4GASUpstreamBank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products OE
1995MazdaProtege1.5LL4GASUpstreamFront oxygen sensor compatible with various vehicle models.; Walker Products OE
1994MazdaMX-31.6LL4GASUpstreamBank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products OE
1994MazdaMX-31.6LL4GASUpstreamFront 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.