Denso 234-5164 Air / Fuel Ratio Sensor - Upstream or Upstream Right

Denso OE Style Air/Fuel Ratio Sensor 234-5164

Denso 234-5164 is an OE Style heated air/fuel ratio sensor built for specific-fit replacement in select Audi applications. It is engineered and tested to OE-level standards for accurate signal response and a first-time fit on vehicles such as the Audi Q5, Audi S5, and Audi A6 Quattro.

Key Features

• OE Style replacement for direct-fit service
• Heated sensor design for faster operating readiness
• Specific fit for targeted Audi engine applications
• 5-wire configuration with male connector
• Wiring harness length: 22.52
• Thread diameter: 0.711
• Regular grade type for standard replacement service

OE Style Product Line

Denso’s OE Style line focuses on exact replacement parts built to match original equipment fit and function. For air/fuel ratio sensor service, that means the sensor is precision-built to align with factory specifications, helping reduce installation issues and supporting consistent signal performance after replacement.

Detailed Description

This Denso air/fuel ratio sensor is designed for upstream and upstream right locations on select Audi models, including 2010-2017 Audi Q5, 2010-2017 Audi S5, 2014-2017 Audi SQ5, 2010-2016 Audi S4, 2009-2015 Audi A6 Quattro, 2012-2015 Audi A7 Quattro, 2011-2015 Audi Q7, 2010-2011 Audi A6, 2008-2010 Audi A5 Quattro, 2009 Audi A4 Quattro, and 2009 Audi Q5. It is a direct replacement for OE-style service where precise fitment and correct sensor configuration matter. This part number, 234-5164, is built to match the application requirements of the original sensor location and wiring layout.

This part cross-references NTK 27002 for the same application.

What It Helps Address

• Check engine light related to air/fuel ratio sensor performance
• Rough idle caused by inaccurate exhaust feedback
• Fuel trim issues from a slow or faulty upstream sensor
• Emissions test failures tied to sensor response problems
• Driveability concerns after sensor aging or contamination

Installation Notes and Tips

Confirm the sensor position before ordering, since this application includes upstream and upstream right locations. Match the connector style, wire count, and thread diameter to the original part before installation. For best results, inspect the harness routing and connector condition during replacement, and verify the vehicle application against the listed Audi fitment for 2008-2017 model years.

Quality Assurance

Denso manufactures and tests this sensor to strict OE standards for replacement accuracy and consistent fit. The OE Style design is intended to provide the correct part and the correct fit for the listed Audi applications the first time.