Walker 350-34163 Oxygen Sensor - Upstream

Walker 350-34163 Oxygen Sensor for Mercedes-Benz SLK230

Walker Products 350-34163 is a heated oxygen sensor built as a specific-fit OE-style replacement for select 1998-1999 Mercedes-Benz SLK230 applications. It is engineered to provide the ECU with the feedback needed for accurate fuel control and emissions monitoring on upstream positions.

Key Features

• Heated oxygen sensor for faster operating response
• Specific fit for the intended upstream application
• 4-wire design with 20-gauge wiring
• Male connector with radiused polygon shape
• Threaded mounting with 18.0 mm thread diameter
• Wiring harness length: 15.67 in.; overall length: 19.21 in.

Product Details

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors developed as replacement parts for original equipment applications. Part number 350-34163 is designed for upstream use on the Mercedes-Benz SLK230, including Bank 1 Sensor 1 service positions listed for 1998-1999 models. This sensor helps the ECU monitor exhaust oxygen content so the engine can maintain proper air-fuel balance and emissions performance. Walker Products 350-34163 is a direct-fit solution for drivers searching for a 1998-1999 Mercedes-Benz SLK230 upstream oxygen sensor or a front oxygen sensor replacement.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Poor fuel economy caused by incorrect air-fuel feedback
• Rough engine operation from inaccurate exhaust readings
• Elevated exhaust emissions from a failing upstream sensor
• Fault codes stored in the ECU for sensor-related issues

Installation Notes and Tips

Before installation, inspect the sensor wiring harness and connector for heat damage, corrosion, or broken terminals. Confirm the upstream mounting location and thread size match the vehicle application before removal of the old sensor. For best results, verify the fault code and related system condition so the replacement addresses the root cause, not just the symptom.

Quality Assurance

Walker Products has produced engine management and fuel system components since 1946 and manufactures this sensor as an OE-style replacement for the specified application. The brand operates under Automotive ISO9001/TS 16949 quality standards and builds parts for application-specific fitment and ECU feedback requirements.