Denso 234-4104 Oxygen Sensor - Downstream

Denso OE Style Oxygen Sensor 234-4104

Denso 234-4104 is an OE Style heated oxygen sensor built for exact replacement and first-time fit. It is engineered for downstream applications on select Chevrolet, Pontiac, and Oldsmobile models, including Chevrolet Classic, Chevrolet Malibu, Pontiac Grand Am, Chevrolet Corvette, and Oldsmobile Alero.

Key Features

• Heated oxygen sensor with a specific-fit design
• 4-wire configuration with female connector
• Threaded mounting type for direct replacement installation
• 42.52-inch wiring harness length
• 0.708-inch thread diameter
• OE Style construction for accurate fit and function

OE Style Construction

Denso’s OE Style line is built to match original equipment dimensions and performance expectations. The 234-4104 oxygen sensor uses precision-built components for direct replacement on downstream locations, helping maintain proper exhaust feedback for engine management. Denso also incorporates an aluminum oxide trap layer to help protect the ceramic element from silicone and lead contamination, supporting long-term sensor durability and stable operation.

This part cross-references Bosch 13682 and NTK 21053 for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect downstream air-fuel feedback readings
• Reduced fuel economy caused by a worn sensor
• Rougher engine operation from inaccurate exhaust monitoring
• Sensor contamination from silicone or lead exposure

Installation Notes

Verify the connector style, wire count, thread diameter, and downstream position before installation. This sensor is a specific-fit, threaded replacement, so matching the original harness length and connector orientation is important for proper routing. Confirm vehicle application by year, make, model, and position before ordering. Fits 2004-2005 Chevrolet Classic, Downstream; Fits 2004-2005 Chevrolet Malibu, Downstream; Fits 2002-2005 Pontiac Grand Am, Downstream; Fits 2004 Chevrolet Corvette, Downstream; Fits 2002-2004 Oldsmobile Alero, Downstream.

Quality Assurance

Denso manufactures and tests this oxygen sensor to OE standards for consistent replacement quality and accurate fitment. The OE Style design and precision-built construction support dependable service on the listed applications, including Chevrolet Malibu, Pontiac Grand Am, and Chevrolet Corvette.