HomeEmission Control > SensorsWalker 350-31001 Oxygen Sensor - Upstream
Part #: 350-31001

Walker 350-31001 Oxygen Sensor - Upstream

Walker Products Aftermarket, Upstream
10 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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In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
Walker Products Aftermarket, Upstream
Fitment: Mazda, MX-6 and 626
Easy Returns — Return within 60 days for a full refund
Fast Shipping — Most orders ship same business day before 1pm CST

Overview of Walker 350-31001 Oxygen Sensor for Mazda 626 and MX-6

The Walker 350-31001 oxygen sensor is designed specifically for Mazda 626 and MX-6 models, providing accurate emission control sensor functionality. This non-heated oxygen sensor features a threaded mounting type and a radiused polygon male connector for precise fitment and reliable performance.

  • Wiring harness length: 15.28 inches
  • Wire gauge measurement: 20 gauge
  • Sensor type: Non heated
  • Specific fit for Mazda 626 and MX-6
  • Wire quantity: 1
  • Connector shape: Radiused polygon
  • Connector gender: Male
  • Thread diameter: 18.0 mm
  • Overall length: 18.82 inches
  • Mounting type: Threaded

Detailed Description of Walker Products Aftermarket Oxygen Sensor

This oxygen sensor from the Walker Products Aftermarket line is engineered to meet the exact specifications required for Mazda 626 and MX-6 vehicles. The sensor’s non-heated design and 20 gauge wire ensure compatibility with the vehicle’s emission system without the need for additional heating elements. The threaded mounting type with an 18.0 mm thread diameter allows for secure installation, while the radiused polygon male connector ensures a precise electrical connection. With a wiring harness length of 15.28 inches and an overall length of 18.82 inches, this sensor fits seamlessly into the designated sensor port.

Common Applications and Issues Addressed

  • Helps maintain proper air-fuel mixture for efficient engine performance
  • Reduces harmful emissions by providing accurate oxygen level readings
  • Prevents engine misfires caused by faulty oxygen sensor signals
  • Supports the vehicle’s onboard diagnostics system for emission control
  • Addresses check engine light triggers related to oxygen sensor failure

Installation Notes and Tips

  • Ensure the vehicle is cool before removing the old sensor to avoid burns
  • Use appropriate tools to avoid damaging the threaded mounting area
  • Verify connector compatibility with the radiused polygon male connector
  • Apply anti-seize compound on threads if recommended by vehicle manufacturer
  • Confirm sensor wiring harness length fits without tension or excess slack

Quality Assurance and Warranty Information

Walker Products Aftermarket oxygen sensors are manufactured to meet industry standards for emission control components. The 350-31001 part number undergoes rigorous quality checks to ensure durability and reliable sensor readings. While specific warranty details may vary, Walker typically offers coverage against manufacturing defects to support long-term vehicle performance.

BrandWalker
Part Number350-31001
PositionWalker Products Aftermarket, Upstream
Connector GenderMale
Connector ShapeRadiused Polygon
Mounting TypeThreaded
Overall Length18.82
Sensor TypeNon Heated
Thread Diameter18.0
Universal Or Specific FitSpecific
Wire Gauge Measurement20
Wire Quantity1
Wiring Harness Length15.28

This part fits 10 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
1992MazdaMX-62.2LL4GASUpstreamBank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products Aftermarket
1992MazdaMX-62.2LL4GASUpstreamFront oxygen sensor compatible with various vehicle models.; Walker Products Aftermarket
1991Mazda6262.2LL4GASUpstreamTurbo; B1S1; Upstream; Walker Products Aftermarket
1991Mazda6262.2LL4GASUpstreamUpstream Turbo Oxygen Sensor for Bank 1 Sensor 1; Walker Products Aftermarket
1991MazdaMX-62.2LL4GASUpstreamBank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products Aftermarket
1991MazdaMX-62.2LL4GASUpstreamFront oxygen sensor compatible with various vehicle models.; Walker Products Aftermarket
1990Mazda6262.2LL4GASUpstreamTurbo; B1S1; Upstream; Walker Products Aftermarket
1990Mazda6262.2LL4GASUpstreamUpstream Turbo Oxygen Sensor for Bank 1 Sensor 1; Walker Products Aftermarket
1990MazdaMX-62.2LL4GASUpstreamBank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products Aftermarket
1990MazdaMX-62.2LL4GASUpstreamFront oxygen sensor compatible with various vehicle models.; Walker Products Aftermarket

* 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.