Denso 234-5068 Air / Fuel Ratio Sensor - Upstream

OE Style Air/Fuel Ratio Sensor

Denso OE Style Air/Fuel Ratio Sensor 234-5068 is built for direct replacement on select Ford and Lincoln applications. It is a heated, specific-fit sensor with a 5-wire design and an 18.27 in. wiring harness for the upstream location.

Designed for precise signal control and first-time fit, this Denso air/fuel ratio sensor supports accurate exhaust feedback on vehicles such as the Ford Fusion, Ford Escape, Ford C-Max, Ford Focus, and Lincoln MKZ.

Key Features

• OE Style replacement for exact-fit service
• Heated sensor design for faster operating temperature
• Specific fit application, not universal
• 5-wire configuration with male connector
• 18.27 in. wiring harness length
• Thread diameter: 0.711
• Upstream position application

Detailed Description

Denso 234-5068 is an OE-style air/fuel ratio sensor manufactured and tested to OE-level standards for accurate replacement performance. The sensor is precision-built to match the original fit and electrical configuration, helping maintain proper feedback to the engine control system. This part cross-references Ford DS7Z9F472A for the same application.

Compatible With 2013-2020 Ford Fusion, upstream; 2013-2020 Lincoln MKZ, upstream; 2014-2018 Ford C-Max, upstream; 2015-2018 Ford Focus, upstream; and 2013-2016 Ford Escape, upstream. Search terms such as upstream air fuel ratio sensor for Ford Fusion 2013-2020 or Lincoln MKZ upstream sensor replacement align with this application.

What It Helps Address

• Fault codes related to air/fuel ratio sensor performance
• Rough idle caused by inaccurate exhaust feedback
• Fuel trim issues from a worn upstream sensor
• Check engine light concerns tied to sensor response
• Driveability problems from delayed or inconsistent sensor readings

Installation Notes

Verify connector style, wire count, and thread diameter before installation. This is a specific-fit upstream sensor, so confirm the vehicle year, make, model, and position match the listed application. Inspect the harness routing and connector condition during replacement to help ensure proper fit and signal integrity.

Quality Assurance

Denso manufactures this OE Style sensor to strict original-equipment standards and tests each component for replacement accuracy and fit consistency. The design focuses on exact replacement dimensions and electrical matching for the listed Ford and Lincoln applications.