Denso 234-4295 Oxygen Sensor - Upstream Left

Denso OE Style Oxygen Sensor 234-4295

Denso 234-4295 is a specific-fit heated oxygen sensor built to OE-style standards for accurate replacement on select Nissan applications. It is engineered for the 2003-2004 Nissan Pathfinder, upstream left, and is designed to deliver the correct fit and signal performance for emission control service.

The Denso OE Style line focuses on exact replacement fitment and consistent sensor construction. This oxygen sensor uses a 4-wire heated design, a male connector, threaded mounting, and a 35.83-inch wiring harness for a direct-fit installation on the listed Pathfinder application.

Key Features

• Specific-fit oxygen sensor for select Nissan Pathfinder applications
• Heated sensor design for faster operating temperature
• 4-wire configuration with male connector
• Threaded mounting with 0.708-inch thread diameter
• 35.83-inch wiring harness length
• OE-style replacement built for exact fit and function

Product Details

Denso 234-4295 is an emission control oxygen sensor for the upstream left position on the 2003-2004 Nissan Pathfinder. It is part of Denso’s OE Style product line, which emphasizes direct replacement fitment and sensor construction aligned with original equipment requirements. The sensor includes Denso’s aluminum oxide trap layer, which helps protect the ceramic element from silicone and lead contamination to support stable engine operation and long service life. This part cross-references Bosch 15529 for the same application.

Common Issues This Sensor Can Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel mixture readings
• Reduced fuel economy from a failing upstream sensor
• Rough idle or drivability concerns tied to sensor signal loss
• Emission test failures caused by a worn oxygen sensor

Installation Notes

Fits 2003-2004 Nissan Pathfinder, upstream left. Confirm connector style, thread size, and harness routing before installation. Because this is a specific-fit sensor, match the vehicle position exactly and inspect the exhaust bung threads for damage or contamination before threading in the replacement.

Quality Assurance

Denso manufactures and tests these oxygen sensors to OE standards for precise replacement fitment and consistent performance. The OE Style design is intended to provide the correct part and fit for the listed application.