Denso
OE Style

Denso 234-9131 Air / Fuel Ratio Sensor - Upstream

Brand Denso 234-9131
Position Upstream
Grade Type Regular
Sensor Type Heated
Universal Or Specific Fit Specific
Wire Quantity 4
Wiring Harness Length 8.27
Product line OE Style
Fits Acura and Honda · 23 vehicles

OE style replacement. Precision-built for exact replacement and a first-time fit.

Heated sensor. Delivers faster operation for accurate air-fuel ratio monitoring.

4-wire design. Provides the connections needed for reliable sensor performance.

Cross-references Honda 365315A2A01, NTK 25680 and Walker Products 250-54038 for the same application. See all 4.

$127.28Free shipping
In stock · usually ships same day before 1pm CST
Step 1 — Confirm fitment
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Step 2 — Quantity
Order total $127.28
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.

Denso OE Style Air/Fuel Ratio Sensor

Denso 234-9131 is an OE Style heated air/fuel ratio sensor built for specific-fit replacement on select Acura and Honda applications. It is engineered for exact replacement and first-time fit, making it a direct choice for drivers servicing upstream sensor issues on vehicles like the Honda Accord, Honda CR-V, Acura ILX, and Acura TLX.

Key Features

  • Heated air/fuel ratio sensor for upstream placement
  • Specific-fit design for direct replacement
  • 4-wire configuration
  • 8.27 in. wiring harness length
  • Regular grade OE Style replacement
  • Built and tested to OE standards for consistent sensor performance

Product Details

The Denso OE Style line focuses on direct-fit emission control components that match original equipment requirements. Part number 234-9131 is designed for precise installation and dependable signal response in air/fuel monitoring systems. This sensor is used on applications including 2013-2017 Honda Accord upstream, 2015-2016 Honda CR-V upstream, 2017-2019 Honda CR-V upstream, 2015-2020 Acura TLX upstream, and 2016-2022 Acura ILX upstream. This part cross-references Honda 365315A2A01 for the same application.

What It Helps Address

  • Check engine light related to upstream air/fuel sensor faults
  • Rough idle caused by inaccurate mixture feedback
  • Fuel trim problems from a slow or failing sensor
  • Emissions test failures tied to sensor performance
  • Driveability issues on Honda Accord, Honda CR-V, Acura ILX, and Acura TLX applications

Installation Notes and Tips

Confirm upstream sensor location before ordering, since this part is specific fit and not universal. Match the connector, wire count, and harness length to the original sensor on the vehicle. For best results, inspect the exhaust threads and wiring routing during replacement, and verify the repair with a scan tool after installation.

Quality Assurance

Denso manufactures and tests this OE Style sensor to strict original-equipment standards for accurate replacement fit and function. The design is intended to deliver the correct part and fit the first time on confirmed applications such as the Honda Accord and Acura ILX.

This part fits 23 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelSubmodelPositionNotes
2022AcuraILX—UpstreamOE; Air / Fuel Ratio Sensor - OE Style
2021AcuraILX—UpstreamOE; Air / Fuel Ratio Sensor - OE Style
2020AcuraILX—UpstreamOE Style
2020AcuraTLX—UpstreamOE Style
2019AcuraILXBaseUpstreamOE Style
2019AcuraTLXBaseUpstreamOE Style
2019HondaCR-V—UpstreamOE; Air / Fuel Ratio Sensor - OE Style
2018AcuraILXBaseUpstreamOE Style
2018AcuraTLX—UpstreamOE Style
2018HondaCR-V—UpstreamOE; Air / Fuel Ratio Sensor - OE Style
2017AcuraILX—UpstreamOE Style
2017AcuraTLX—UpstreamOE Style
2017HondaAccord—UpstreamOE Style
2017HondaCR-V—UpstreamOE; Air / Fuel Ratio Sensor - OE Style
2016AcuraILX—UpstreamOE Style
2016AcuraTLX—UpstreamOE Style
2016HondaAccord—UpstreamOE Style
2016HondaCR-V—UpstreamOE Style
2015AcuraTLX—UpstreamOE Style
2015HondaAccord—UpstreamOE Style
2015HondaCR-V—UpstreamOE Style
2014HondaAccord—UpstreamOE Style
2013HondaAccord—UpstreamOE Style
Directly replaces or cross-references 4 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Honda — 365315A2A01NTK — 25680Walker Products — 250-54038Walker Products — 350-64035