Walker 350-34227 Oxygen Sensor

Walker 350-34227 Oxygen Sensor for OE-Style Emissions Repair

Walker Products Aftermarket oxygen sensor 350-34227 is a specific-fit heated sensor engineered as an OE-style replacement for select Audi, Porsche, and Volkswagen applications. It is built to deliver the diagnostic feedback the ECU expects, helping restore proper air-fuel monitoring on downstream and upstream positions where listed.

Key Features

• Heated oxygen sensor with specific fitment for targeted vehicle applications
• 4-wire design with 22-gauge wiring and a 24.13 in. harness length
• Threaded mounting with 18.0 mm thread diameter
• Male connector with radiused polygon connector shape
• Overall length: 27.68 in.
• Walker Products Aftermarket part number 350-34227

Product Details

Walker Products Engine Management and Oxygen/Air-Fuel sensors are developed as Original Equipment Manufacturer replacement parts for a wide range of vehicles. This sensor is designed for the specified application and position so the ECU receives the correct feedback for emissions and fuel-control monitoring. For Audi A8 Quattro, RS7, S6, S7, and S8 models, as well as Porsche Cayenne and Volkswagen Passat, CC, Tiguan, and Saveiro applications, correct sensor placement is critical for accurate system operation. Part number 350-34227 is a direct-fit emissions control sensor for select downstream right, downstream left, upstream, and downstream positions listed below.

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensor coverage for modern vehicles, with application-specific fitment and catalog support for repair professionals and DIY buyers working on Audi, Porsche, and Volkswagen emissions systems.

What This Sensor Helps Address

• Check engine light related to oxygen sensor performance
• Poor engine operation caused by incorrect air-fuel feedback
• Increased fuel consumption from inaccurate sensor readings
• Elevated exhaust emissions from a failing heated oxygen sensor
• Fault codes stored in the ECU for the affected sensor circuit

Installation Notes and Fitment

• Fits 2015-2018 Audi A8 Quattro, downstream right.
• Fits 2015-2018 Audi RS7, downstream right.
• Fits 2015-2018 Audi S6, downstream right.
• Fits 2015-2018 Audi S7, downstream right.
• Fits 2015-2018 Audi S8, downstream right.
• Fits 2016-2018 Porsche Cayenne, downstream left.
• Fits 2014 Porsche Cayenne, downstream left.
• Fits 2016-2017 Volkswagen Saveiro, upstream.
• Fits 2016-2017 Volkswagen Saveiro, downstream.
• Fits 2012-2014 Audi A8 Quattro, downstream.
• Fits 2013-2014 Audi A8 Quattro, downstream right.
• Fits 2014 Audi RS7, downstream right.
• Fits 2013-2014 Audi S6, downstream right.
• Fits 2013-2014 Audi S7, downstream right.
• Fits 2013-2014 Audi S8, downstream right.
• Fits 2013 Porsche Cayenne, downstream right.
• Fits 2011-2012 Porsche Cayenne, downstream.
• Fits 2011 Audi A6 Quattro, downstream right.
• Fits 2007-2011 Audi S6, downstream.
• Fits 2006-2010 Volkswagen Passat, downstream.
• Fits 2010 Volkswagen Passat, downstream.
• Fits 2009 Volkswagen CC, downstream.
• Fits 2009 Volkswagen Tiguan, downstream.

Before installation, verify the connector shape, wire count, thread diameter, and sensor position against the original part. Inspect the sensor wiring harness and connector for damage, since damaged wiring can shorten sensor life and trigger recurring fault codes. For Audi A8 Quattro downstream right oxygen sensor replacement, Porsche Cayenne downstream left sensor service, or Volkswagen Passat downstream oxygen sensor repair, confirm the exact bank and sensor location before installation. Part number 350-34227 should be matched to the listed application only.

Quality Assurance

Walker Products has supplied engine management and fuel system components since 1946 and operates with Automotive ISO 9001 / TS 16949 certification. The brand’s OE-style sensor development and application-specific cataloging support accurate replacement selection for emissions control repairs.