Walker 350-34070 Oxygen Sensor - Downstream, Downstream Left or Downstream Right

OE-Style Downstream Oxygen Sensor

Walker Products 350-34070 is a heated oxygen sensor built for specific vehicle applications and downstream mounting positions. It is engineered as an OE replacement for select Audi and Volkswagen models, helping the ECU receive the feedback it expects from the exhaust system.

For drivers searching for a downstream oxygen sensor for Audi A4, Audi A5, Volkswagen Jetta, or Volkswagen Golf, this Walker Products Aftermarket part number 350-34070 is built around the application details that matter most: fitment position, connector style, thread size, and harness length.

Key Features

• Heated oxygen sensor design for downstream exhaust monitoring
• Specific-fit application for direct vehicle matching
• 4-wire configuration with 22-gauge wiring
• Radiused polygon male connector
• Threaded mounting type with 18.0 mm thread diameter
• 16.06 in. wiring harness length and 19.61 in. overall length
• Walker Products Aftermarket part number 350-34070

Detailed Product Information

Walker Products Engine Management and Oxygen/Air-Fuel sensors are developed as OE replacement parts for many vehicles worldwide. This downstream oxygen sensor is designed to provide the diagnostic feedback required by the ECU on supported applications. It is a direct-fit replacement for select 2005-2018 Audi and Volkswagen models, including Audi A4, Audi A5, RS5, S5, S6, S8, and Volkswagen Jetta, Bora, Golf, and Jetta applications listed in the fitment data.

Part number 350-34070 is built for downstream placement and specific vehicle fitment, making it a practical choice when replacing a failed sensor that has triggered a fault code, poor engine performance, higher fuel use, increased emissions, or a malfunction indicator light. Walker Products has supplied engine management and fuel system components since 1946 and manufactures parts to application-specific requirements.

What This Sensor Helps Address

• Check engine light related to downstream oxygen sensor faults
• Poor fuel economy caused by inaccurate exhaust feedback
• Rough engine operation tied to sensor signal issues
• Elevated exhaust emissions from a failing oxygen sensor
• Stored ECU fault codes linked to the affected sensor circuit

Installation Notes and Fitment

Fits 2018 Volkswagen Jetta, downstream.

Fits 2013-2016 Audi A4, downstream.

Fits 2012-2016 Audi A5, downstream.

Fits 2009 Audi A5, downstream.

Fits 2015 Audi RS5, downstream right.

Fits 2015 Audi RS5, downstream left.

Fits 2013-2014 Audi RS5, downstream right.

Fits 2013-2014 Audi RS5, downstream left.

Fits 2008-2011 Audi S5, downstream right.

Fits 2008-2011 Audi S5, downstream left.

Fits 2007-2011 Audi S6, downstream.

Fits 2007-2009 Audi S8, downstream.

Fits 2010-2011 Volkswagen Golf, downstream.

Fits 2006-2009 Volkswagen Bora, downstream.

Fits 2005-2009 Volkswagen Jetta, downstream.

Confirm connector shape, thread diameter, and downstream position before installation. Inspect the sensor wiring harness and connector for damage, since physical wear can shorten service life and affect operation.

Quality Assurance

Walker Products Aftermarket sensors are manufactured for specific applications and fitment positions to support the diagnostic needs of the vehicle ECU. The brand’s ISO 9001/TS 16949 manufacturing background reflects a controlled production process for engine management components.