Walker 350-341013 Oxygen Sensor - Downstream

Walker 350-341013 Oxygen Sensor Overview

Walker Products 350-341013 is a heated oxygen sensor built as a specific-fit OE-style replacement for downstream monitoring on select Audi and Volkswagen applications. It is engineered to provide the ECU with the feedback needed for emissions and fuel-control diagnostics, making it a direct-fit option for 2016-2018 Audi A3 Sportback e-tron and 2016-2018 Volkswagen Jetta models.

Key Features

• Heated oxygen sensor for downstream exhaust monitoring
• Specific fitment for the intended vehicle and sensor position
• 4-wire design with a 20-gauge harness
• Threaded mounting with 18.0 mm thread diameter
• Radiused polygon male connector for application-specific connection
• Wiring harness length: 40.15 in.; overall length: 43.30 in.

Detailed Product Description

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors developed for OE replacement use. Part number 350-341013 is designed for downstream bank 1 sensor 2 service on the listed vehicles, where accurate exhaust feedback helps the ECU monitor catalyst and emissions performance. This Walker oxygen sensor is a practical choice for Audi A3 Sportback e-tron and Volkswagen Jetta owners needing a direct-fit replacement that matches the specified mounting style, connector shape, and harness layout.

This part cross-references Walker Products Aftermarket 350-341013 for the same application.

What This Sensor Helps Address

• Check engine light related to oxygen sensor performance
• Poor fuel economy caused by inaccurate exhaust feedback
• Rough engine operation tied to faulty sensor input
• Elevated exhaust emissions from a failing downstream sensor
• Stored ECU fault codes associated with the affected sensor circuit

Installation Notes and Tips

Confirm the vehicle is a 2016-2018 Audi A3 Sportback e-tron or 2016-2018 Volkswagen Jetta with downstream bank 1 sensor 2 placement before ordering. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before installation, since physical damage can shorten sensor life. Verify the threaded mounting location and connector orientation match the original unit.

Quality Assurance

Walker Products states that its engine management sensors are developed as OE replacement parts and manufactured under Automotive ISO9001/TS 16949 quality systems. The brand has supplied engine management and fuel system components since 1946.