Walker 350-34095 Oxygen Sensor - Downstream or Upstream

Walker 350-34095 Oxygen Sensor for BMW

Walker Products 350-34095 is a heated oxygen sensor built as a specific-fit OE replacement for select BMW applications. It is engineered to provide the ECU with the feedback needed for accurate fuel control and emissions monitoring on BMW 323i, 328i, 528i, M3, and Z3 models.

Key Features

• Heated oxygen sensor for faster operating response
• Specific-fit design for the listed BMW applications
• Threaded mounting with 18.0 mm thread diameter
• 4-wire configuration with male radiused polygon connector
• 36.54 in. wiring harness length and 40.08 in. overall length
• Walker Products Aftermarket line for engine management and oxygen sensor replacement

Product Details

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensor replacement parts built for application-specific fitment. Part number 350-34095 is made to match the required installation position and deliver the diagnostic signal the ECU expects. For BMW vehicles, that means dependable feedback for upstream and downstream sensor locations where precise air-fuel monitoring matters.

Compatible With select 1996-2000 BMW 323i, 323is, 323ti, 328i, 328is, 528i, M3, and Z3 applications, this sensor supports common OE-style replacement needs on BMW exhaust systems. This part number, 350-34095, is also a practical match for drivers addressing emissions faults or sensor-related drivability concerns on BMW 328i and BMW Z3 platforms.

This part cross-references no listed interchange numbers in the provided data.

Common Issues This Sensor May Address

• Check engine light related to oxygen sensor performance
• Poor fuel economy caused by incorrect exhaust feedback
• Rough engine operation from inaccurate air-fuel readings
• Elevated exhaust emissions from a failing sensor
• Stored ECU fault codes tied to the affected sensor circuit

Installation Notes

Verify the sensor position before installation, since fitment varies by upstream and downstream location and by cylinder bank on some BMW models. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before replacement. Confirm the threaded mounting point and connector style match the vehicle harness before final installation.

Quality Assurance

Walker Products has supplied engine management and fuel system components since 1946 and operates as an ISO 9001/TS 16949 certified company. Part number 350-34095 is manufactured for the specified application and fitment position to support the ECU feedback required by the vehicle.