Denso 234-4775 Oxygen Sensor - Downstream or Downstream Front

Denso OE Style Oxygen Sensor 234-4775

Denso 234-4775 is an OE Style heated oxygen sensor built for exact replacement and first-time fit. It is engineered for specific applications on Nissan Altima models and uses a threaded mounting design with a 4-wire male connector for direct service replacement.

The OE Style line focuses on factory-style fit and function, with precision-built components that match the original sensor layout. For Nissan Altima oxygen sensor replacement, this part is designed to restore accurate exhaust feedback and support proper engine management.

Key Features

• Heated oxygen sensor for faster operating response
• Specific fit design for direct replacement
• 4-wire configuration with male connector
• Threaded mounting type for secure installation
• Wiring harness length: 10.63 in.
• Thread diameter: 0.708 in.
• OE Style construction for factory-like fit and function

OE Style Construction

Denso’s OE Style product line is built to mirror original equipment dimensions and connection points, helping reduce fitment issues during service. The sensor uses an aluminum oxide trap layer to help protect the ceramic element from silicone and lead contamination, supporting stable operation and long service life. This Denso 234-4775 oxygen sensor is a practical choice for Nissan Altima owners needing a direct-fit emission control replacement.

This part cross-references NTK 24641 and Bosch 15949 for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel mixture feedback
• Reduced fuel economy from a slow or failing sensor
• Rough idle or drivability concerns tied to exhaust sensor input
• Emission control faults on downstream sensor circuits

Fitment Notes

• Fits 2004 Nissan Altima, Downstream Front, to 01/04; OE Style
• Fits 2002-2003 Nissan Altima, Downstream Front, OE Style
• Fits 2001 Nissan Altima, Downstream, from 12/00; OE Style

Installation Notes and Quality Assurance

Confirm the sensor position, connector style, and thread size before installation. Use the vehicle’s exact build date and exhaust location to match the listed Nissan Altima applications, especially for 2001 and 2004 models with date-specific fitment notes. Denso manufactures and tests this sensor to OE standards for consistent replacement quality and dependable fit.