HomeEmission Control > SensorsWalker 350-34246 Oxygen Sensor - Center or Downstream
Part #: 350-34246

Walker 350-34246 Oxygen Sensor - Center or Downstream

Walker Products Aftermarket, Downstream
54 vehicles fit this part
Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
Walker Products Aftermarket, Downstream
Fitment: Mazda, 2, 3, and 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 350-34246 Oxygen Sensor for Mazda Vehicles

The Walker 350-34246 oxygen sensor is designed specifically for select Mazda models, including the Mazda 2, 3, and 6. This heated oxygen sensor ensures accurate emissions monitoring and optimal engine performance by providing precise air-fuel mixture data to the vehicle's engine control unit.

  • Heated oxygen sensor with threaded mounting
  • Specific fit for Mazda 2, 3, and 6 models
  • 29.84-inch wiring harness length for flexible installation
  • 20-gauge wire with 4-wire configuration
  • Radiused polygon female connector for secure connection
  • 18.0 mm thread diameter and 33.39-inch overall length

Detailed Product Features and Specifications

This Walker oxygen sensor (part number 350-34246) features a heated sensor element that allows for faster warm-up times and improved emissions control. The sensor is designed with a threaded mounting type and an 18.0 mm thread diameter, ensuring a secure and precise fit in the exhaust system. The wiring harness length of 29.84 inches provides ample reach for installation, while the 20-gauge wire and 4-wire configuration support reliable signal transmission and heater operation. The connector is a radiused polygon female type, engineered to match the original equipment specifications for Mazda 2, 3, and 6 models.

Walker Products Aftermarket Line Information

The Walker Products Aftermarket line offers replacement emission control components engineered to meet or exceed OEM standards. This oxygen sensor is part of that line, providing a direct-fit solution for Mazda vehicles that require precise sensor performance and durability. The aftermarket line focuses on delivering components that maintain vehicle emissions compliance and engine efficiency.

Common Applications and Problem Resolution

  • Restores accurate oxygen sensing for proper air-fuel mixture control
  • Resolves check engine light issues related to oxygen sensor faults
  • Improves fuel economy by ensuring correct sensor feedback
  • Reduces harmful emissions by maintaining proper sensor function
  • Eliminates rough idling or engine hesitation caused by faulty sensors

Installation Notes and Tips

When installing the Walker 350-34246 oxygen sensor, ensure the vehicle is cool to avoid burns. Use appropriate tools to remove the old sensor and avoid damaging the wiring harness. Verify the connector type matches the vehicle’s harness before installation. Thread the sensor carefully to prevent cross-threading and torque to manufacturer specifications. The 29.84-inch wiring harness length allows for flexible routing during installation.

Quality Assurance and Warranty

Walker Products Aftermarket oxygen sensors are manufactured to meet strict quality standards for durability and performance. While specific warranty details for part number 350-34246 should be confirmed at the point of purchase, Walker typically offers limited warranties covering defects in materials and workmanship to ensure reliability in emission control applications.

BrandWalker
Part Number350-34246
PositionWalker Products Aftermarket, Downstream
Connector GenderFemale
Connector ShapeRadiused Polygon
Mounting TypeThreaded
Overall Length33.39
Sensor TypeHeated
Thread Diameter18.0
Universal Or Specific FitSpecific
Wire Gauge Measurement20
Wire Quantity4
Wiring Harness Length29.84

This part fits 54 vehicles. Search below:

YearMakeModelSubmodelTransmissionLitersCylindersFuel TypePositionNotes
2017Mazda21.5LL4GASDownstreamFits downstream bank 1 sensor 2 on specific vehicle models.; Walker Products Aftermarket
2016Mazda21.5LL4GASDownstreamFits downstream bank 1 sensor 2 on specific vehicle models.; Walker Products Aftermarket
2015Mazda21.5LL4GASDownstreamFits downstream bank 1 sensor 2 on specific vehicle models.; Walker Products Aftermarket
2014Mazda21.5LL4GASDownstreamFits downstream bank 1 sensor 2 on specific vehicle models.; Walker Products Aftermarket
2013Mazda21.5LL4GASDownstreamFits downstream bank 1 sensor 2 on specific vehicle models.; Walker Products Aftermarket
2012Mazda21.5LL4GASDownstreamFits downstream bank 1 sensor 2 on specific vehicle models.; Walker Products Aftermarket
2011Mazda21.5LL4GASDownstreamFits downstream bank 1 sensor 2 on specific vehicle models.; Walker Products Aftermarket
2009Mazda32.3LL4GASDownstreamDownstream oxygen sensor for B1S2 position in California emissions.; Walker Products Aftermarket
2009Mazda32.3LL4GASCenterCalif-ESV, Center Oxygen Sensor; Walker Products Aftermarket
2009Mazda32.0LL4GASDownstreamDownstream oxygen sensor for B1S2 position in California emissions.; Walker Products Aftermarket
2009Mazda32.0LL4GASCenterCalif-ESV, Center Oxygen Sensor; Walker Products Aftermarket
2009Mazda32.3LL4GASDownstreamDownstream oxygen sensor compatible with California-ESV vehicles in bank 1 position 2.; Walker Products Aftermarket
2009Mazda32.0LL4GASDownstreamDownstream oxygen sensor compatible with California-ESV vehicles in bank 1 position 2.; Walker Products Aftermarket
2008Mazda32.3LL4GASDownstreamCalif-ESV; B1S3; Downstream; Walker Products Aftermarket
2008Mazda32.3LL4GASCenterCalif-ESV; B1S2; Center; Walker Products Aftermarket
2008Mazda32.0LL4GASDownstreamCalif-ESV; B1S3; Downstream; Walker Products Aftermarket
2008Mazda32.0LL4GASCenterNon Calif-ESV; B1S2; No Calif-ESV; Center; Walker Products Aftermarket
2008Mazda32.0LL4GASCenterCalif-ESV; B1S2; Center; Walker Products Aftermarket
2008Mazda32.3LL4GASDownstreamCalif-ESV; Downstream; B1S3; Walker Products Aftermarket
2008Mazda32.3LL4GASCenterCalif-ESV Center Oxygen Sensor B1S2; Walker Products Aftermarket
2008Mazda32.0LL4GASDownstreamCalif-ESV; Downstream; B1S3; Walker Products Aftermarket
2008Mazda32.0LL4GASCenterNon-Calif-ESV, No Calif-ESV, Center, B1S2; Walker Products Aftermarket
2008Mazda32.0LL4GASCenterCalif-ESV Center Oxygen Sensor B1S2; Walker Products Aftermarket
2008Mazda32.0LL4GASCenterNon Calif-ESV; B1S2; Center; Walker Products Aftermarket
2008Mazda6Automatic2.3LL4GASDownstreamDownstream oxygen sensor for B1S2 position in California emissions.; Walker Products Aftermarket
2008Mazda6Automatic2.3LL4GASDownstreamDownstream oxygen sensor compatible with California-ESV vehicles in bank 1 position 2.; Walker Products Aftermarket
2007Mazda32.3LL4GASDownstreamCalif-ESV; B1S3; Downstream; Walker Products Aftermarket
2007Mazda32.3LL4GASCenterCalif-ESV; B1S2; Center; Walker Products Aftermarket
2007Mazda32.0LL4GASDownstreamCalif-ESV; B1S3; Downstream; Walker Products Aftermarket
2007Mazda32.0LL4GASCenterCalif-ESV; B1S2; Center; Walker Products Aftermarket
2007Mazda32.3LL4GASDownstreamCalif-ESV; Downstream; B1S3; Walker Products Aftermarket
2007Mazda32.3LL4GASCenterCalif-ESV Center Oxygen Sensor B1S2; Walker Products Aftermarket
2007Mazda32.0LL4GASDownstreamCalif-ESV; Downstream; B1S3; Walker Products Aftermarket
2007Mazda32.0LL4GASCenterCalif-ESV Center Oxygen Sensor B1S2; Walker Products Aftermarket
2007Mazda6Automatic2.3LL4GASDownstreamDownstream oxygen sensor for B1S2 position in California emissions.; Walker Products Aftermarket
2007Mazda6Automatic2.3LL4GASDownstreamDownstream oxygen sensor compatible with California-ESV vehicles in bank 1 position 2.; Walker Products Aftermarket
2006Mazda32.3LL4GASDownstreamCalif-ESV; B1S3; Downstream; Walker Products Aftermarket
2006Mazda32.3LL4GASCenterCalif-ESV; B1S2; Center; Walker Products Aftermarket
2006Mazda32.0LL4GASDownstreamCalif-ESV; B1S3; Downstream; Walker Products Aftermarket
2006Mazda32.0LL4GASCenterCalif-ESV; B1S2; Center; Walker Products Aftermarket
2006Mazda32.3LL4GASDownstreamCalif-ESV; Downstream; B1S3; Walker Products Aftermarket
2006Mazda32.3LL4GASCenterCalif-ESV Center Oxygen Sensor B1S2; Walker Products Aftermarket
2006Mazda32.0LL4GASDownstreamCalif-ESV; Downstream; B1S3; Walker Products Aftermarket
2006Mazda32.0LL4GASCenterCalif-ESV Center Oxygen Sensor B1S2; Walker Products Aftermarket
2006Mazda6iAutomatic2.3LL4GASDownstreamCalif-ESV; B1S3; Downstream; Walker Products Aftermarket
2006Mazda6iAutomatic2.3LL4GASDownstreamCalif-ESV; Downstream; B1S3; Walker Products Aftermarket
2005Mazda32.0LL4GASDownstreamCalif-ESV; B1S3; Downstream; Walker Products Aftermarket
2005Mazda32.0LL4GASCenterCalif-ESV; B1S2; Center; Walker Products Aftermarket
2005Mazda32.0LL4GASDownstreamCalif-ESV; Downstream; B1S3; Walker Products Aftermarket
2005Mazda32.0LL4GASCenterCalif-ESV Center Oxygen Sensor B1S2; Walker Products Aftermarket
2004Mazda32.0LL4GASDownstreamCalif-ESV; B1S3; Downstream; Walker Products Aftermarket
2004Mazda32.0LL4GASCenterCalif-ESV; B1S2; Center; Walker Products Aftermarket
2004Mazda32.0LL4GASDownstreamCalif-ESV; Downstream; B1S3; Walker Products Aftermarket
2004Mazda32.0LL4GASCenterCalif-ESV Center Oxygen Sensor B1S2; 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.