Walker 350-34149 Oxygen Sensor - Upstream

Walker 350-34149 Oxygen Sensor for Mercedes-Benz C230

Walker Products 350-34149 is a heated oxygen sensor built as a specific-fit OE replacement for select Mercedes-Benz C230 applications. It is engineered for upstream placement and provides the ECU with the exhaust feedback needed for fuel control and emissions monitoring.

Key Features

• Heated oxygen sensor for faster operating response
• Specific-fit design for the correct application and mounting position
• Upstream placement for Bank 1 Sensor 1 service on listed Mercedes-Benz C230 models
• 4-wire design with male radiused polygon connector
• Threaded mounting with 18.0 mm thread diameter
• Wiring harness length: 43.43 in.; overall length: 46.97 in.
• Walker Products Aftermarket part number 350-34149

Detailed Description

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors built to OE-style application requirements. Part number 350-34149 is made for the specified fitment position, helping maintain the diagnostic feedback the ECU expects from the upstream sensor circuit. This part is listed for 1997-2000 Mercedes-Benz C230, upstream, including Bank 1 Sensor 1 service applications.

For shoppers searching for a Mercedes-Benz C230 upstream oxygen sensor, Walker 350-34149 offers the correct heated sensor format, threaded installation, and application-specific connector layout. It is a direct-fit style replacement for the listed Mercedes-Benz C230 model years and positions.

What It Helps Address

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

Installation Notes and Tips

Verify the vehicle is a 1997-2000 Mercedes-Benz C230 with upstream sensor placement before ordering. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before installation, since damaged wiring can shorten sensor life and affect readings. Confirm the 18.0 mm threaded mounting point and connector style match the original unit. This part cross-references no additional part numbers in the provided data.

Quality Assurance

Walker Products has produced engine management components since 1946 and operates with Automotive ISO9001/TS 16949 certification. The 350-34149 is manufactured for the specified application and fitment position to deliver the diagnostic feedback required by the ECU.