Denso 234-4296 Oxygen Sensor - Upstream or Upstream Right

Denso OE Style Oxygen Sensor 234-4296

Denso 234-4296 is an OE Style heated oxygen sensor built for exact replacement and first-time fit. It is engineered for specific applications on Nissan and INFINITI models, including upstream right and upstream locations, with the connector, thread, and harness layout matched to the vehicle.

Key Features

• Heated oxygen sensor for faster operating response
• Specific-fit design for direct replacement applications
• 4-wire configuration with male connector
• Threaded mounting type with 0.708 in. thread diameter
• 14.57 in. wiring harness length for application-specific routing
• OE Style construction for Nissan and INFINITI fitment

OE Style Construction

Denso’s OE Style line is built to match original equipment dimensions and electrical requirements, helping maintain proper sensor response and drivability. The sensor uses an aluminum oxide trap layer to help protect the ceramic element from silicone and lead contamination, supporting stable engine management and long service life. This part number, 234-4296, is a direct-fit option for vehicles such as the 2002-2006 Nissan Sentra, 2002-2003 Nissan Altima, 2003 Nissan Murano, 2005-2006 Nissan X-Trail, and select INFINITI FX45, M45, and Q45 applications.

This part cross-references Bosch (e.g., 15369, 15525) for the same application.

Common Symptoms It May Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel mixture readings
• Poor fuel economy from inaccurate exhaust feedback
• Rough idle or hesitation caused by sensor signal issues
• Failed emissions inspection tied to upstream sensor faults

Installation Notes

Verify the vehicle’s engine bank, upstream location, and connector style before installation. This sensor uses a threaded mount and a 4-wire male connector, so matching the original routing and plug orientation is important for proper installation. Confirm fitment for California-emissions and clean-air-vehicle notes where listed, especially on 2004 Nissan Sentra and 2002 Nissan Sentra applications.

Quality Assurance

Denso manufactures and tests this oxygen sensor to strict OE standards for consistent fit and performance. The OE Style design is intended to deliver the correct part and the correct fit for the listed Nissan and INFINITI applications.