Denso 234-4617 Oxygen Sensor - Downstream

Denso OE Style Oxygen Sensor 234-4617

Denso 234-4617 is an OE Style heated oxygen sensor built for specific-fit replacement on select GM applications. It is engineered for accurate exhaust feedback, stable engine management, and a first-time fit on vehicles such as the Chevrolet Corvette, Chevrolet Malibu, Oldsmobile Alero, and Pontiac Grand Am.

Key Features

• Heated oxygen sensor with a specific-fit design
• 4-wire configuration with female connector
• Threaded mounting type for direct replacement
• Wiring harness length: 44.84
• Thread diameter: 0.708
• OE Style construction for factory-style fit and function

OE Style Product Line Details

Denso’s OE Style line focuses on direct replacement parts built to match original equipment dimensions and electrical requirements. For this oxygen sensor, that means the sensor body, connector style, and harness layout are designed to align with the original application, helping reduce fitment issues during replacement. The Denso 234-4617 also uses an aluminum oxide trap layer to help protect the ceramic element from silicone and lead contamination, supporting consistent sensor response and long service life.

Fitment

• Fits 1999-2004 Oldsmobile Alero, Downstream
• Fits 1999-2004 Pontiac Grand Am, Downstream
• Fits 1997-2003 Chevrolet Corvette, Downstream
• Fits 1997-2003 Chevrolet Malibu, Downstream
• Fits 1999 Oldsmobile Cutlass, Downstream
• Fits 1997 Oldsmobile Cutlass, Downstream

This part cross-references Bosch 13111 for the same application.

What It Helps Address

• Check engine light concerns related to downstream oxygen sensor performance
• Incorrect air-fuel feedback from a worn or contaminated sensor
• Reduced fuel economy caused by inaccurate exhaust readings
• Rough idle or drivability issues tied to sensor signal degradation
• Emissions test failures caused by a faulty downstream sensor

Installation Notes

Confirm the connector style, wire count, and threaded mounting dimensions before installation. This Denso oxygen sensor is a specific-fit replacement, so matching the downstream location and vehicle application is important for proper operation. Inspect the harness routing and exhaust threads during replacement to avoid damage to the sensor or connector.

Quality Assurance

Denso manufactures and tests this oxygen sensor to OE standards for replacement accuracy and consistent performance. The design is intended to deliver the correct part and fit for the listed Chevrolet, Oldsmobile, and Pontiac applications.