Denso 234-9039 Air / Fuel Ratio Sensor - Upstream or Upstream Rear

Denso OE Style Air/Fuel Ratio Sensor

Denso 234-9039 is an OE Style heated air/fuel ratio sensor built for specific-fit replacement on select Nissan applications. It is engineered for exact replacement fitment and direct signal control in the air/fuel monitoring system.

Key Features

• OE Style replacement for precise fit and function
• Heated sensor design for faster operating temperature
• Specific fit application for direct replacement use
• 4-wire configuration with male connector
• Wiring harness length: 14.57
• Thread diameter: 0.711

Product Details

Denso 234-9039 is manufactured and tested to OE standards for consistent sensor performance and first-time fit. As part of Denso’s OE Style line, this air/fuel ratio sensor is built for drivers and technicians who need a direct replacement for the original sensor on Nissan Sentra, Altima, Cube, Maxima, and Versa applications. This part cross-references NTK 25679 for the same application.

Compatible With 2008-2012 Nissan Sentra, Upstream; 2008-2009 Nissan Altima, Upstream Rear; 2009 Nissan Cube, Upstream; 2009 Nissan Maxima, Upstream Rear; 2009 Nissan Sentra, Upstream, excluding California; and 2008-2009 Nissan Versa, Upstream. The Denso 234-9039 is a direct-fit solution for restoring accurate air/fuel ratio sensor operation on these vehicles.

Common Issues This Sensor May Address

• Check engine light related to air/fuel ratio sensor performance
• Incorrect upstream sensor readings
• Rough idle caused by faulty sensor feedback
• Fuel mixture control problems from a worn sensor
• Emissions test failure tied to sensor malfunction

Installation Notes and Tips

Verify the connector style, wire count, thread diameter, and sensor position before installation. This is a specific-fit heated sensor, so confirm the vehicle application and note that 2009 Sentra coverage excludes California. Use the listed upstream or upstream rear position only where shown in the fitment data.

Quality Assurance

Denso builds this OE Style sensor to strict original-equipment standards and tests each component for replacement accuracy and fit consistency. The goal is a direct replacement that matches the intended application without modification.