Denso 234-5176 Air / Fuel Ratio Sensor - Upstream, Upstream Left or Upstream Right

Denso OE Style Air/Fuel Ratio Sensor

Denso 234-5176 is an OE Style heated air/fuel ratio sensor built for specific-fit replacement on select Ford applications. It is engineered for direct replacement service with a female connector, 5-wire design, and a 19.17 in. wiring harness for a precise match to the original sensor layout.

For Ford Mustang, Transit Connect, Transit-150, Transit-250, Transit-350, F-150, Fusion, Escape, and E-350 Super Duty applications, this sensor supports accurate exhaust feedback at the upstream location. The Denso OE Style line focuses on exact replacement fitment and OE-level build consistency for straightforward service work.

Key Features

• Part number: 234-5176
• Heated air/fuel ratio sensor for upstream placement
• Specific fit design for direct replacement service
• 5-wire configuration with female connector
• Wiring harness length: 19.17 in.
• Thread diameter: 0.708 in.
• OE Style replacement for select Ford emissions applications

Detailed Description

Denso 234-5176 is an OE-style air/fuel ratio sensor manufactured and tested to OE standards for consistent signal performance and first-time fit. This sensor is used in upstream exhaust locations where the engine management system monitors air-fuel mixture data for closed-loop control. It is a direct replacement choice for 2014-2016 Ford Escape upstream, 2014-2016 Ford Fusion upstream, 2015-2017 Ford F-150 upstream and upstream right, 2015-2017 Ford Mustang upstream, 2016-2019 Ford Transit-150 upstream left, 2016-2019 Ford Transit-250 upstream left, 2016-2019 Ford Transit-350 upstream left, 2016-2019 Ford Transit-350 HD upstream left, 2016-2018 Ford E-350 Super Duty upstream, 2017-2019 Ford E-350 Super Duty upstream right, 2018 Ford Mustang upstream right, 2019 Ford Mustang upstream left, and 2020 Ford Mustang upstream right. This part cross-references Ford EJ5Z9F472A and NTK 27006 for the same application.

What It Helps Address

• Check engine light related to air/fuel ratio sensor performance
• Rough idle caused by inaccurate upstream mixture feedback
• Fuel trim issues from a slow or faulty sensor signal
• Emissions test failures tied to sensor response problems
• Driveability concerns on Ford Mustang, F-150, Fusion, Escape, Transit Connect, and E-350 Super Duty applications

Installation Notes and Tips

Verify the connector style, wire count, thread diameter, and harness length before installation. Confirm the exact upstream position on the vehicle, since Ford applications in this listing use upstream left, upstream right, and upstream locations. Compare the original sensor routing and connector orientation to ensure the replacement follows the factory path without strain.

Quality Assurance

Denso manufactures this OE Style sensor to strict original-equipment standards and tests each component for replacement accuracy and fit consistency. The 234-5176 is built for direct-fit service on the listed Ford applications, with attention to exact replacement dimensions and connector configuration.