HomeEmission Control > SensorsWalker 350-34154 Oxygen Sensor - Upstream or Upstream Rear
Part #: 350-34154

Walker 350-34154 Oxygen Sensor - Upstream or Upstream Rear

Walker Products Aftermarket, Upstream
⚙️ 11 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 Aftermarket, Upstream
🚗Fitment: Mazda, 6 and Millenia
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST

Overview of Walker 350-34154 Oxygen Sensor for Mazda Vehicles

The Walker 350-34154 oxygen sensor is designed specifically for select Mazda models, including the Mazda 6 and Millenia. This heated oxygen sensor ensures accurate emissions control and optimal engine performance by providing precise air-fuel mixture data to the vehicle’s engine management system.

  • Heated oxygen sensor with 4-wire design for reliable operation
  • Specific fit for Mazda 6 and Millenia models
  • Threaded mounting type with 18.0 mm thread diameter
  • 21.97-inch wiring harness length with radiused polygon male connector
  • Wire gauge measurement of 20 for durability and signal integrity
  • Overall length of 25.51 inches for proper installation

Detailed Product Description and Attributes

This Walker Products Aftermarket oxygen sensor (part number 350-34154) features a heated sensor type that allows for faster warm-up times and improved emissions monitoring. The sensor includes a 4-wire configuration, which supports both the heating element and signal wires, ensuring consistent sensor performance. The wiring harness length of 21.97 inches and the radiused polygon male connector are designed to match the factory specifications for a direct replacement on Mazda 6 and Millenia vehicles. The threaded mounting type with an 18.0 mm diameter allows for secure installation in the exhaust system. The wire gauge measurement of 20 provides a balance between flexibility and durability, contributing to long-term reliability.

The Walker Products Aftermarket line focuses on providing quality replacement parts that meet or exceed OEM standards. This oxygen sensor is engineered to maintain proper emissions control and engine efficiency, supporting compliance with environmental regulations and helping to maintain vehicle drivability.

Compatible Vehicles and Common Applications

  • Compatible with Mazda 6 models requiring a specific fit oxygen sensor
  • Compatible with Mazda Millenia models for precise emissions control
  • Used to monitor oxygen levels in the exhaust for optimal air-fuel mixture
  • Helps address issues such as poor fuel economy, rough idling, and failed emissions tests
  • Supports engine management system diagnostics and performance

Installation Notes and Tips

  • Ensure the vehicle is cool before removing the old oxygen sensor to avoid burns
  • Use appropriate tools to avoid damaging the threaded mounting or connector
  • Verify connector type and wiring harness length match factory specifications
  • Apply anti-seize compound to the threads if recommended by the vehicle manufacturer
  • After installation, clear any diagnostic trouble codes and perform a test drive to confirm proper operation

Quality Assurance and Warranty Information

Walker Products Aftermarket oxygen sensors are manufactured to meet strict quality standards, ensuring reliable performance and durability. While specific warranty details for part number 350-34154 may vary, Walker typically offers coverage against defects in materials and workmanship. It is recommended to consult the product documentation or manufacturer for exact warranty terms.

BrandWalker
Part Number350-34154
PositionWalker Products Aftermarket, Upstream
Connector GenderMale
Connector ShapeRadiused Polygon
Mounting TypeThreaded
Overall Length25.51
Sensor TypeHeated
Thread Diameter18.0
Universal Or Specific FitSpecific
Wire Gauge Measurement20
Wire Quantity4
Wiring Harness Length21.97

This part fits 11 vehicles. Search below:

YearMakeModelTransmissionLitersCylindersFuel TypePositionNotes
2005Mazda6Manual2.3LL4GASUpstreamBank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products Aftermarket
2005Mazda6Automatic2.3LL4GASUpstreamNon California emissions certified; Bank 1 Sensor 1; Upstream position; Not suitable for California emissionscertified vehicles; Walker Products Aftermarket
2005Mazda6Manual2.3LL4GASUpstreamFront oxygen sensor compatible with various vehicle models.; Walker Products Aftermarket
2005Mazda6Automatic2.3LL4GASUpstreamFor vehicles without California and Federal Emissions - Upstream Bank 1 Sensor 1.; Walker Products Aftermarket
2005Mazda6Automatic2.3LL4GASUpstreamUpstream oxygen sensor for bank 1 sensor 1 incompatible with California-ESV vehicles.; Walker Products Aftermarket
2004Mazda62.3LL4GASUpstreamBank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products Aftermarket
2004Mazda62.3LL4GASUpstreamFront oxygen sensor compatible with various vehicle models.; Walker Products Aftermarket
2003Mazda62.3LL4GASUpstreamBank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products Aftermarket
2003Mazda62.3LL4GASUpstreamFront oxygen sensor compatible with various vehicle models.; Walker Products Aftermarket
2002MazdaMillenia2.5LV6GASUpstream RearUpstream oxygen sensor for rear exhaust system.; Walker Products Aftermarket
2001MazdaMillenia2.5LV6GASUpstream RearUpstream oxygen sensor for rear exhaust system.; 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.