Denso 234-5115 Air / Fuel Ratio Sensor - Upstream or Upstream Left

OE Style Air/Fuel Ratio Sensor for Volkswagen and Audi

Denso 234-5115 is an OE Style heated air/fuel ratio sensor built for specific-fit replacement on select Volkswagen and Audi applications. It is engineered for exact fitment and consistent signal performance in upstream locations, including Touareg, A4, Jetta, Passat, and related models.

Key Features

• OE Style replacement air/fuel ratio sensor for precise fit and function
• Heated sensor design for faster operating readiness
• Specific fit application for direct replacement on listed vehicles
• 5-wire configuration with male connector
• 58.66-inch wiring harness length for application-specific routing
• Thread diameter: 0.711

Product Details

Denso 234-5115 is manufactured and tested to OE standards, with each component precision-built for exact replacement and first-time fit. This air/fuel ratio sensor is intended for upstream positions on select Volkswagen and Audi vehicles, including 2001-2006 Audi A4 upstream, 1999-2005 Volkswagen Jetta upstream, and 2004-2007 Volkswagen Touareg upstream. The OE Style line focuses on direct replacement parts that match the original sensor layout and connection requirements, helping maintain proper exhaust feedback for engine management systems. This part cross-references Bosch (e.g., 17005, 17351) for the same application.

What It Helps Address

• Check engine light related to air/fuel ratio sensor faults
• Rough idle caused by inaccurate exhaust feedback
• Fuel trim issues from a slow or failing upstream sensor
• Emissions test failures tied to sensor performance
• Poor drivability from incorrect air/fuel mixture correction

Installation Notes and Fitment

Fits 2004-2007 Volkswagen Touareg, Upstream. Fits 2001-2006 Audi A4, Upstream. Fits 2004-2006 Audi A8 Quattro, Upstream. Fits 2001-2006 Audi TT, Upstream. Fits 1999-2006 Volkswagen Golf, Upstream. Fits 2004-2006 Volkswagen Phaeton, Upstream. Fits 2001-2005 Audi A4 Quattro, Upstream. Fits 1999-2005 Volkswagen Jetta, Upstream. Fits 2001-2005 Volkswagen Passat, Upstream. Fits 2004-2005 Volkswagen Phaeton, Upstream Left. Fits 2001-2004 Volkswagen Beetle, Upstream. Fits 2004 Volkswagen Touareg, Upstream Left. Fits 2001-2003 Volkswagen EuroVan, Upstream. Fits 2001-2002 Audi TT Quattro, Upstream.

Verify connector style, harness routing, and upstream sensor location before installation. Use the vehicle’s original sensor placement and wiring path to confirm proper fit on Audi A4, Volkswagen Jetta, and Volkswagen Touareg applications.

Quality Assurance

Denso builds this OE Style sensor to strict original-equipment standards and tests each unit for replacement accuracy and first-time fit. The part number 234-5115 is designed to match the specified application requirements for dependable service on listed Volkswagen and Audi vehicles.