Walker 350-34340 Oxygen Sensor - Downstream, Downstream Right or Upstream

Walker Oxygen Sensor for Volkswagen and Audi

Walker Products 350-34340 is a heated oxygen sensor built as a specific-fit OE replacement for select Volkswagen and Audi applications. It is engineered to provide the ECU with the feedback needed for accurate fuel control and emissions monitoring.

Use this Walker Products Aftermarket sensor when servicing upstream or downstream oxygen sensor locations on supported Volkswagen Golf, Jetta, Beetle, Sharan, Phaeton, Saveiro, Clasico, Audi A3, and Audi TT models.

Key Features

• Part number: 350-34340
• Heated oxygen sensor design for faster operating temperature
• Specific fit application for direct vehicle matching
• 4-wire configuration with 22-gauge wiring
• 40.87 in. wiring harness length and 44.41 in. overall length
• Threaded mounting with 18.0 mm thread diameter
• Radiused polygon male connector

Product Details

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors developed as OE-style replacements for global vehicle platforms. Part number 350-34340 is built for the specified fitment position and is intended to deliver the diagnostic signal the ECU expects from the original sensor. This matters on Volkswagen Golf, Jetta, Beetle, and Sharan applications where upstream or downstream sensor feedback directly affects fuel trim, emissions performance, and fault-code monitoring. The same applies to select Audi A3 and Audi TT models listed below.

This part cross-references Bosch 15733 for the same application.

Fitment

• Fits 2011-2015 Volkswagen Clasico, upstream.
• Fits 2010-2013 Volkswagen Saveiro, upstream.
• Fits 2006-2008 Volkswagen Sharan, downstream.
• Fits 2001-2006 Volkswagen Golf, downstream.
• Fits 2004-2006 Volkswagen Phaeton, downstream right.
• Fits 2002-2005 Volkswagen Sharan, downstream.
• Fits 2001-2004 Volkswagen Beetle, downstream.
• Fits 1999-2002 Volkswagen Golf, downstream.
• Fits 2000-2001 Volkswagen Beetle, upstream.
• Fits 1998 Volkswagen Beetle, upstream.
• Fits 2000-2001 Volkswagen Golf, upstream.
• Fits 2000-2001 Volkswagen Jetta, upstream.
• Fits 1998-2000 Audi A3, upstream.
• Fits 1999 Audi TT, upstream.
• Fits 1999 Volkswagen Beetle, upstream.
• Fits 1999 Volkswagen Golf, upstream.
• Fits 1999 Volkswagen Jetta, upstream.

Installation Notes

Confirm the sensor position before installation: upstream, downstream, or downstream right as listed for the vehicle. Inspect the wiring harness and connector for damage before replacement, and verify the threaded mounting point and connector shape match the original unit. For 1999 Volkswagen Beetle, Golf, and Jetta applications, check the chassis breakpoints shown in the fitment notes.

Quality Assurance

Walker Products has supplied engine management components since 1946 and manufactures this sensor as an OE replacement for the specified application. The brand operates under Automotive ISO9001/TS 16949 quality systems, with application-specific fitment and ECU feedback requirements in mind.