Denso 234-4479 Oxygen Sensor - Downstream

Denso OE Style Oxygen Sensor 234-4479

Denso 234-4479 is an OE Style heated oxygen sensor built for direct replacement on select BMW applications. It is engineered for a specific fit, with a 4-wire male connector, threaded mounting, and a 26.77-inch wiring harness for a clean factory-style installation.

Compatible With BMW 535i GT, 535i, X3, X4, 740i, 640i, 335i, X5, X6, and related models in downstream locations, this sensor is designed for accurate exhaust monitoring and dependable signal response. The Denso OE Style line focuses on exact replacement fitment and OE-level construction.

Key Features

• Heated oxygen sensor for downstream exhaust monitoring
• Specific-fit design for select BMW applications
• 4-wire configuration with male connector
• Threaded mounting with 0.708-inch thread diameter
• 26.77-inch wiring harness length
• OE Style replacement from Denso

Built for OE-Style Replacement

Denso 234-4479 is manufactured and tested to OE standards for a direct replacement on the listed BMW vehicles. The sensor uses Denso’s aluminum oxide trap layer to help protect the ceramic element from silicone and lead contamination, supporting stable engine management performance and long service life. This part cross-references BMW 11787589475 and Bosch 16220 for the same application.

What This Sensor Helps Address

• Check engine lights related to downstream oxygen sensor faults
• Incorrect exhaust oxygen readings sent to the engine control system
• Reduced fuel economy caused by a failing sensor signal
• Rough or inconsistent engine performance tied to emissions feedback issues
• Emissions test failures caused by a worn or contaminated sensor

Installation Notes and Tips

Verify the connector style, thread diameter, and downstream position before installation. This sensor is a specific-fit replacement, so match it to the exact BMW model and year listed for your application. For best results, inspect the harness routing and exhaust threads before installing the new sensor.

Fits 2010-2017 BMW 535i GT, Downstream; 2011-2017 BMW 535i GT xDrive, Downstream; 2011-2017 BMW X3, Downstream; 2011-2016 BMW 535i, Downstream; 2011-2016 BMW 535i xDrive, Downstream; 2015-2016 BMW X4, Downstream; 2013-2015 BMW 740i, Downstream; 2013-2015 BMW 740Li, Downstream; 2013-2015 BMW 740Li xDrive, Downstream; 2013-2015 BMW ActiveHybrid 7, Downstream; 2014 BMW 335i GT xDrive, Downstream; 2012-2014 BMW 640i, Downstream; 2013-2014 BMW 640i Gran Coupe, Downstream; 2014 BMW 640i xDrive, Downstream; 2014 BMW 640i xDrive Gran Coupe, Downstream; 2011-2014 BMW X6, Downstream; 2011-2013 BMW 135i, Downstream; 2013 BMW 135is, Downstream; 2011-2013 BMW 335i, Downstream; 2013 BMW ActiveHybrid 3, Downstream; 2012-2013 BMW ActiveHybrid 5, Downstream; 2011-2013 BMW X5, Downstream; 2011 BMW 528i, Downstream.

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 is intended to deliver the right part for the listed BMW applications the first time.