Denso 234-4642 Oxygen Sensor - Downstream or Upstream

Denso OE Style Oxygen Sensor 234-4642

Denso 234-4642 is an OE Style heated oxygen sensor built for specific-fit replacement on select Mitsubishi applications. It is engineered for accurate exhaust feedback, stable engine management, and a first-time fit on vehicles such as the Mitsubishi Lancer, Eclipse, and Diamante.

Key Features

• OE Style, specific-fit oxygen sensor for direct replacement
• Heated sensor design with 4-wire configuration
• Female connector and threaded mounting type
• Wiring harness length: 19.29
• Thread diameter: 0.708
• Built and tested to OE standards for consistent performance
• Uses Denso’s aluminum oxide trap layer to help protect the ceramic element from silicone and lead contamination

Product Details

This Denso oxygen sensor is designed to restore accurate air-fuel monitoring in the exhaust stream. The heated design helps the sensor reach operating temperature quickly, supporting reliable feedback to the engine control system. Denso’s OE Style construction focuses on exact replacement dimensions and connector layout, which helps simplify installation on Mitsubishi Lancer, Mitsubishi Eclipse, and Mitsubishi Diamante applications. Part number 234-4642 is also a direct-fit option for drivers replacing a worn upstream or downstream sensor on the listed vehicles.

This part cross-references Bosch 13805 and NTK 23001 for the same application.

Vehicle Fitment

• Fits 2006 Mitsubishi Lancer, downstream
• Fits 2002-2005 Mitsubishi Lancer, downstream
• Fits 1999-2000 Mitsubishi Diamante, downstream
• Fits 2000 Mitsubishi Eclipse, upstream
• Fits 2000 Mitsubishi Eclipse, downstream
• Fits 1997-1998 Mitsubishi Diamante, downstream
• Fits 1992-1993 Mitsubishi Diamante, upstream

Common Repair Uses

• Replacing a failed oxygen sensor that triggers check engine light concerns
• Restoring fuel trim control after sensor aging or contamination
• Addressing poor fuel economy caused by inaccurate exhaust readings
• Correcting rough idle or drivability issues tied to sensor response
• Repairing emissions-related faults on Mitsubishi Lancer, Eclipse, and Diamante models

Installation Notes

Verify the sensor position, connector style, and thread size before installation. This is a specific-fit, threaded sensor with a female connector and 4-wire layout, so matching the original configuration is important. Confirm the vehicle’s build date and emissions configuration, since some listed applications exclude California or apply only to certain production dates. Use proper oxygen sensor service tools and inspect the harness routing to avoid heat damage.

Quality Assurance

Denso manufactures this OE Style oxygen sensor to strict original-equipment standards and tests each component for replacement accuracy and fit. The design includes contamination protection for the sensing element, supporting long-term sensor stability and dependable engine performance.