Denso 234-4301 Oxygen Sensor

Denso OE Style Oxygen Sensor 234-4301

Denso 234-4301 is an OE-style heated oxygen sensor built for direct replacement in select Nissan and INFINITI applications. It is engineered for a specific fit and precise signal control, helping restore accurate exhaust monitoring on vehicles such as the Nissan Altima, Maxima, Murano, Quest, Sentra, and INFINITI Q45 and M45.

Key Features

• Heated oxygen sensor with a specific-fit design
• OE-style replacement for direct installation in the original location
• 4-wire configuration with male connector
• Threaded mounting type with 0.708 in. thread diameter
• 10.63 in. wiring harness length
• Built to OE standards for fit, form, and function
• Uses Denso’s aluminum oxide trap layer to help protect the sensing element from silicone and lead contamination

Product Details

Denso’s OE Style line focuses on exact replacement parts that match the original sensor layout and connection style. Part number 234-4301 is a heated oxygen sensor designed to deliver the correct fit and signal response for downstream exhaust monitoring. This part cross-references Bosch 15525 and NTK 24404 for the same application.

Compatible With select 2002-2009 Nissan and INFINITI applications, including Fits 2005-2009 Nissan Quest, Downstream Front; Fits 2004-2008 Nissan Maxima, Downstream; Fits 2003-2007 Nissan Murano, Downstream; Fits 2002-2006 INFINITI Q45, Downstream Left; Fits 2005-2006 Nissan Altima, Downstream Front; and Fits 2003-2004 INFINITI M45, Downstream Left. Denso 234-4301 also covers additional downstream positions on select Altima, Maxima, Quest, and Sentra models.

Common Issues This Sensor Can Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio feedback from a worn downstream sensor
• Reduced fuel economy caused by inaccurate exhaust readings
• Slow sensor response from contamination or age
• Failed emissions inspection tied to sensor fault codes

Installation Notes and Tips

Verify the connector style, wire count, thread diameter, and mounting position before installation. This is a specific-fit sensor, so match the vehicle year, make, model, and downstream location exactly to the fitment listing. Inspect the exhaust bung threads and wiring routing during replacement to ensure the sensor seats correctly and the harness clears hot exhaust components.

Quality Assurance

Denso manufactures and tests this oxygen sensor to OE standards for consistent replacement performance and first-time fit. The OE Style design is intended to match original equipment requirements for the listed Nissan and INFINITI applications.