Denso 234-5056 Air / Fuel Ratio Sensor - Upstream, Upstream Front or Upstream Left

Denso OE Style Air/Fuel Ratio Sensor 234-5056

Denso 234-5056 is an OE Style heated air/fuel ratio sensor built for direct replacement on select Honda, Acura, and Hyundai applications. It is engineered for exact fit and consistent signal performance, making it a practical choice for upstream sensor service on vehicles such as the Honda Accord, Pilot, Ridgeline, and Acura MDX.

Key Features

• OE Style replacement air/fuel ratio sensor for emission control service
• Heated sensor design for faster operating temperature
• Specific fit for direct replacement on listed applications
• 5-wire configuration with male connector
• Wiring harness length: 10.51
• Thread diameter: 0.711
• Built and tested to OE standards for replacement accuracy

Product Details

Denso 234-5056 is a heated air/fuel ratio sensor designed to match original equipment fit and function on upstream locations. The OE Style line focuses on precise replacement dimensions and first-time fit, which is important when servicing emissions-related sensors on Honda Accord, Honda Pilot, Honda Ridgeline, Acura MDX, Acura RLX, Acura TLX, Acura RDX, and select Hyundai Accent applications. This part cross-references NTK 24372 and 27041 for the same application.

Use this sensor when you need a direct-fit replacement that follows the original connector style, wire count, and mounting dimensions. The Denso 234-5056 is intended for vehicles that require a specific-fit upstream air/fuel ratio sensor, including 2012-2019 Honda Pilot, 2013-2017 Honda Accord, and 2014-2020 Acura MDX applications.

Vehicle Fitment

• Fits 2014-2020 Acura MDX, Upstream
• Fits 2014-2020 Acura RLX, Upstream
• Fits 2019-2020 Acura TLX, Upstream
• Fits 2015-2017 Acura TLX, Upstream
• Fits 2013-2017 Acura RDX, Upstream
• Fits 2012-2019 Honda Pilot, Upstream
• Fits 2020 Honda Pilot, Upstream Rear
• Fits 2017-2019 Honda Ridgeline, Upstream
• Fits 2012-2014 Honda Ridgeline, Upstream
• Fits 2013-2017 Honda Accord, Upstream
• Fits 2017 Honda Accord, Upstream Front, Excluding California
• Fits 2013-2016 Honda Accord, Upstream, Excluding California
• Fits 2013-2015 Honda Crosstour, Upstream
• Fits 2014-2015 Honda Odyssey, Upstream
• Fits 2016-2017 Honda Odyssey, Upstream Left
• Fits 2019 Hyundai Accent, Upstream

What It Helps Address

• Check engine light related to upstream air/fuel ratio sensor faults
• Rough idle or unstable fuel trim readings
• Delayed sensor response during closed-loop operation
• Emissions test failures tied to sensor performance
• Incorrect air/fuel mixture feedback to the engine control system

Installation Notes

Confirm the connector style, wire count, and sensor position before installation. This is a specific-fit sensor, so match the vehicle year, make, model, and upstream location exactly to the listed applications. For best results, inspect the harness routing and connector condition before installing the replacement sensor.

Quality Assurance

Denso manufactures and tests this OE Style sensor to strict original-equipment standards. The design emphasizes accurate replacement dimensions and consistent fit for emissions service on the listed Honda, Acura, and Hyundai applications.