HomeEmission Control > SensorsWalker 350-64066 Oxygen Sensor - Upstream
Part #: 350-64066

Walker 350-64066 Oxygen Sensor - Upstream

Walker Products Aftermarket, Upstream
2 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, 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 350-64066 Oxygen Sensor for Mazda 6

The Walker 350-64066 oxygen sensor is designed specifically for Mazda 6 models, providing precise emissions control and engine performance monitoring. This heated oxygen sensor features a threaded mounting type and a radiused polygon female connector for secure installation.

  • Heated oxygen sensor with 4 wires for accurate readings
  • Specific fitment for Mazda 6 ensuring compatibility
  • 22.17-inch wiring harness length for flexible installation
  • 20 gauge wire measurement for durability and signal integrity
  • Thread diameter of 18.0 mm with threaded mounting type
  • Radiused polygon female connector for reliable connection
  • Overall length of 25.71 inches for proper placement

Walker Products Aftermarket Line Details

The Walker Products Aftermarket line focuses on providing replacement emission control components that meet or exceed OEM specifications. This oxygen sensor, part number 350-64066, is engineered to deliver consistent performance and durability for Mazda 6 vehicles, supporting emission standards and engine efficiency.

Product Description and Attributes

This oxygen sensor is a heated type, which allows it to reach operating temperature quickly, improving fuel management and reducing emissions. It includes four wires with a 20 gauge measurement, ensuring reliable electrical signals. The wiring harness length of 22.17 inches and overall length of 25.71 inches provide ample reach for installation in the exhaust system. The sensor features a threaded mounting type with an 18.0 mm thread diameter, compatible with the Mazda 6 exhaust manifold or pipe. The connector is a radiused polygon female type, designed for a secure and precise fit.

Common Applications and Issues Addressed

  • Helps maintain optimal air-fuel mixture for efficient combustion
  • Reduces engine misfires and rough idling caused by faulty sensors
  • Supports emission control compliance by monitoring exhaust gases
  • Prevents check engine light triggers related to oxygen sensor faults
  • Improves fuel economy by providing accurate oxygen level data

Installation Notes and Tips

When installing the Walker 350-64066 oxygen sensor on a Mazda 6, ensure the engine is cool to avoid burns. Use appropriate tools to remove the old sensor and avoid damaging the wiring harness. Confirm the connector matches the radiused polygon female type for a secure connection. Thread the sensor carefully into the exhaust port with the 18.0 mm diameter to prevent cross-threading. Verify wiring length and routing to prevent interference with moving parts or heat sources.

Quality Assurance and Warranty

Walker Products Aftermarket oxygen sensors are manufactured to meet strict quality standards, ensuring reliable performance and durability. This part number 350-64066 undergoes rigorous testing to comply with emission control requirements. Warranty details are provided by Walker and typically cover defects in materials and workmanship under normal use.

BrandWalker
Part Number350-64066
PositionWalker Products Aftermarket, Upstream
Connector GenderFemale
Connector ShapeRadiused Polygon
Mounting TypeThreaded
Overall Length25.71
Sensor TypeHeated
Thread Diameter18.0
Universal Or Specific FitSpecific
Wire Gauge Measurement20
Wire Quantity4
Wiring Harness Length22.17

This part fits 2 vehicles. Search below:

YearMakeModelTransmissionLitersCylindersFuel TypePositionNotes
2005Mazda6Automatic2.3LL4GASUpstreamCompatible with California-ESV vehicles, Upstream Oxygen Sensor; Walker Products Aftermarket
2005Mazda6Automatic2.3LL4GASUpstreamCalifornia emissions ESV vehicles oxygen sensor; 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.