Denso 234-4490 Oxygen Sensor

Denso OE Style Oxygen Sensor 234-4490

Denso 234-4490 is an OE Style heated oxygen sensor built for direct replacement on select Ford, Lincoln, and Mercury applications. It is engineered for exact fit and stable signal performance, with a threaded mounting design and a female 4-wire connector for the listed downstream positions.

Key Features

• Heated oxygen sensor for downstream exhaust monitoring
• Specific-fit design for listed Ford, Lincoln, and Mercury vehicles
• Threaded mounting type with 0.708 in. thread diameter
• 17.52 in. wiring harness length for the specified applications
• 4-wire configuration with female connector
• OE Style replacement built to match factory fit and function
• Aluminum oxide trap layer helps protect the sensing element from silicone and lead contamination

Product Details

This Denso oxygen sensor is part of the OE Style line, which focuses on direct-replacement coverage for factory-style fitment. The sensor is manufactured and tested to OE standards, and the design supports accurate exhaust feedback on vehicles such as the Ford F-150, Ford Mustang, Ford Explorer, Lincoln MKZ, and Lincoln MKS. Denso 234-4490 is a practical choice when replacing a worn downstream sensor on vehicles that require the listed connector, harness length, and threaded mounting configuration.

This part cross-references Motorcraft DY1153 and NTK 22135 for the same application.

Vehicle Fitment

• Fits 2016 Lincoln MKS, downstream, to 12/07/2015; OE Style
• Fits 2011-2016 Lincoln MKZ, downstream; OE Style
• Fits 2014-2015 Ford Explorer, downstream; OE Style
• Fits 2014-2015 Ford Flex, downstream; OE Style
• Fits 2014-2015 Ford Taurus, downstream; OE Style
• Fits 2015 Ford Transit-150, downstream left; OE Style
• Fits 2015 Ford Transit-250, downstream left; OE Style
• Fits 2015 Ford Transit-350, downstream left; OE Style
• Fits 2015 Ford Transit-350 HD, downstream left; OE Style
• Fits 2013-2015 Lincoln MKS, downstream; OE Style
• Fits 2015 Lincoln MKT, downstream; OE Style
• Fits 2011-2014 Ford F-150, downstream; OE Style
• Fits 2011-2014 Ford Mustang, downstream; OE Style
• Fits 2013-2014 Lincoln MKT, downstream right, with 17.5 in. downstream right sensor; OE Style
• Fits 2013-2014 Lincoln MKT, downstream left, with 15 in. downstream left sensor; OE Style
• Fits 2013 Ford Explorer, downstream rear; OE Style
• Fits 2013 Ford Flex, downstream left; OE Style
• Fits 2013 Ford Taurus, downstream left; OE Style
• Fits 2011-2012 Ford Escape, downstream; OE Style
• Fits 2011-2012 Ford Fusion, downstream front; OE Style
• Fits 2011-2012 Ford Fusion, downstream; OE Style
• Fits 2011 Mercury Mariner, downstream; OE Style
• Fits 2011 Mercury Milan, downstream front; OE Style
• Fits 2011 Mercury Milan, downstream; OE Style

Common Replacement Uses

• Restores proper downstream oxygen sensor readings after sensor wear
• Addresses check engine light concerns tied to oxygen sensor faults
• Replaces a sensor with damaged wiring, connector, or threaded body
• Supports fuel control and exhaust monitoring on Ford, Lincoln, and Mercury applications
• Helps correct drivability issues related to inaccurate exhaust feedback

Installation Notes

Verify the downstream position, connector style, harness length, and thread diameter before installation. This is a specific-fit sensor, so match the vehicle year, model, and sensor location exactly to the fitment list. Use the listed OE-style application data for Ford F-150, Ford Mustang, Lincoln MKZ, and related vehicles to confirm the correct replacement before removing the original sensor.

Quality Assurance

Denso manufactures this sensor to strict OE standards and tests each component for replacement accuracy and first-time fit. The OE Style design and contamination-resistant trap layer support long service life in demanding exhaust environments.