Walker 350-35038 Oxygen Sensor - Upstream or Upstream Front

Walker 350-35038 Oxygen Sensor for Mazda 6

Walker Products 350-35038 is a heated oxygen sensor built as a specific-fit OE replacement for the 2006-2008 Mazda 6 in upstream Bank 1 Sensor 1 applications. It is engineered to provide the ECU with the diagnostic feedback needed for proper fuel control and emissions monitoring.

Key Features

• Heated oxygen sensor for upstream monitoring
• Specific fit for the Mazda 6 application
• 5-wire design with 20-gauge wiring
• 23.15 in. wiring harness length and 26.69 in. overall length
• 18.0 mm threaded mounting design
• Radiused polygon connector shape with male and female connector ends listed in the application data

Application Details

Fits 2006-2008 Mazda 6, upstream Bank 1 Sensor 1. Additional listed coverage includes 2007 Mazda 6, upstream front. Walker Products Aftermarket positions this sensor as an OE-style replacement for vehicles that require accurate upstream oxygen sensor feedback for engine management.

The Walker Products Aftermarket line focuses on engine management and oxygen/air-fuel sensors for application-specific fitment. Part number 350-35038 follows that approach with a threaded, heated sensor configuration intended for direct replacement in the listed Mazda 6 positions. This part number 350-35038 is also referenced for 2006-2008 Mazda 6 upstream applications.

What It Helps Address

• Check engine light related to upstream oxygen sensor faults
• Poor fuel economy caused by incorrect air-fuel feedback
• Rough engine operation from inaccurate sensor readings
• Elevated exhaust emissions from a failing sensor
• Stored ECU fault codes tied to Bank 1 Sensor 1

Installation Notes

Verify the vehicle is a non-California emissions application where required by the fitment notes before ordering. Inspect the sensor wiring harness and connector for damage before installation, since damaged wiring can shorten sensor life and affect signal quality. Confirm the threaded mounting location and connector style match the original part before replacement.

Quality Assurance

Walker Products manufactures engine management sensors as OE replacement parts and operates as an Automotive ISO9001/TS 16949 certified company. Since 1946, the brand has supplied oxygen and air-fuel sensors for vehicle-specific applications, including this Walker 350-35038 oxygen sensor.