Denso 234-4467 Oxygen Sensor - Downstream

Denso OE Style Oxygen Sensor for Mazda 3

Denso 234-4467 is an OE Style heated oxygen sensor built for specific-fit replacement on select Mazda 3 and Mazda 3 Sport applications. It is engineered for downstream placement and uses a threaded mounting design with a 4-wire male connector for direct replacement service.

Denso’s OE Style line focuses on exact-fit replacement parts built and tested to OE standards. This oxygen sensor also uses Denso’s aluminum oxide trap layer to help protect the sensing element from silicone and lead contamination, supporting stable engine management and long service life.

Key Features

• Specific-fit downstream oxygen sensor for select Mazda applications
• Heated sensor design for faster operating response
• 4-wire configuration with male connector
• Threaded mounting type with 0.708 in. thread diameter
• 12.60 in. wiring harness length
• OE Style replacement engineered for first-time fit
• Part number: 234-4467

Product Details

This Denso oxygen sensor is designed for vehicles that require a downstream sensor in the exhaust stream, including 2010-2013 Mazda 3 and 2010-2013 Mazda 3 Sport applications listed below. It is also a direct reference for OE-style service where accurate air-fuel feedback and emissions monitoring are needed. This part cross-references Bosch 18041 for the same application. Part number 234-4467 is also referenced in OE-style replacement searches for Mazda 3 oxygen sensor service.

Used For

• Replacing a failed downstream oxygen sensor on a Mazda 3
• Addressing check engine lights related to oxygen sensor performance
• Restoring proper exhaust feedback for fuel control
• Correcting emissions-monitoring faults tied to the downstream sensor
• Replacing a sensor with damaged wiring, connector, or threaded mount

Installation Notes

Verify the connector style, wire count, thread diameter, and downstream location before installation. This sensor is a specific-fit part, so confirm the vehicle year, model, and engine configuration against the listed applications, including 2012 Mazda 3 models except SkyActiv Engine and 2011 Mazda 3 built for Mexico. For best results, inspect the exhaust bung threads and wiring routing before final tightening.

Quality Assurance

Denso manufactures and tests this OE Style oxygen sensor to OE standards for accurate fit and dependable operation. The sensor’s protective trap layer is designed to help resist contamination that can shorten sensor life and affect engine performance.

• Fits 2013 Mazda 3, downstream
• Fits 2010-2011 Mazda 3, downstream
• Fits 2012-2013 Mazda 3 Sport, downstream
• Fits 2010 Mazda 3 Sport, downstream
• Fits 2012 Mazda 3, downstream, exc. SkyActiv Engine
• Fits 2011 Mazda 3, downstream, Mexico