Denso 234-4306 Oxygen Sensor - Downstream or Downstream Right

Denso 234-4306 Oxygen Sensor for OE-Style Replacement

Denso 234-4306 is an OE Style heated oxygen sensor built for specific-fit replacement in select Toyota, Pontiac, and GMC applications. It is engineered to match factory mounting, connector, and wiring requirements for a direct service replacement on downstream positions.

Key Features

• Heated oxygen sensor with specific fitment for direct replacement
• Threaded mounting type with a 0.708 thread diameter
• 4-wire design with male connector and 37.01 wiring harness length
• OE Style construction for factory-style fit and function
• Built to Denso OE standards with an aluminum oxide trap layer to help protect the ceramic element from silicone and lead contamination

OE-Style Design and Performance

Denso’s OE Style sensor line is built for exact replacement and first-time fit, making this part a practical choice when servicing downstream oxygen sensor faults. The Denso 234-4306 is designed to restore accurate exhaust feedback in vehicles such as the Toyota Venza, Toyota Matrix, and Pontiac Vibe, while maintaining the original threaded, heated, 4-wire configuration. This part cross-references ACDelco 213-4289 and Bosch 18011 for the same application.

What This Oxygen Sensor Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel mixture readings from a worn downstream sensor
• Reduced fuel economy caused by delayed exhaust feedback
• Rougher engine operation tied to inaccurate sensor data
• Service replacement needs on Toyota Venza, Toyota Matrix, and Pontiac Vibe downstream positions

Installation Notes and Tips

Verify the connector style, wire count, and threaded mounting before installation. This sensor is a specific-fit part, so it should be matched to the exact downstream position listed for your vehicle. Confirm the application by year, make, model, and position before replacing the original sensor.

Quality Assurance

Denso manufactures and tests this oxygen sensor to OE standards for consistent fit and function. The sensor’s protective trap layer is intended to help resist contamination that can shorten sensor life and affect engine performance.

• Fits 2009-2016 Toyota Venza, Downstream Right
• Fits 2009-2013 Toyota Matrix, Downstream
• Fits 2009-2010 Pontiac Vibe, Downstream