Denso 234-9301 Air / Fuel Ratio Sensor - Upstream

Denso OE Style Air/Fuel Ratio Sensor

Denso 234-9301 is an OE Style heated air/fuel ratio sensor built for specific-fit replacement on select Toyota, Lexus, and Pontiac applications. It is engineered to match factory-style dimensions and connector layout for a direct replacement on upstream sensor locations.

The OE Style line focuses on exact replacement fitment and consistent sensor construction, making this Denso air/fuel ratio sensor a practical choice for drivers servicing emissions and fuel-control systems on vehicles such as the Toyota Prius, Toyota Corolla, Lexus CT200h, and Pontiac Vibe.

• Heated air/fuel ratio sensor for upstream placement
• Specific-fit design for direct replacement applications
• 4-wire configuration with male connector
• Wiring harness length: 10.75
• Thread diameter: 0.709
• Regular grade type for OE-style service replacement

OE Style Construction Details

Denso manufactures and tests this sensor to OE standards, with precision-built components intended to match the original part’s fit and function. Part number 234-9301 is designed for exact replacement use, helping maintain proper air-fuel feedback to the engine control system. This part cross-references ACDelco 213-4285 and Bosch 13996 for the same application.

Vehicle Fitment

• Fits 2017-2018 Toyota Prius V, Upstream, OE; Air / Fuel Ratio Sensor - OE Style
• Fits 2015-2017 Lexus CT200h, Upstream, OE Style
• Fits 2015-2016 Toyota Prius V, Upstream, OE Style
• Fits 2015 Toyota Prius, Upstream, OE Style
• Fits 2010 Toyota Prius, Upstream, OE Style
• Fits 2015 Toyota Prius Plug-In, Upstream, OE Style
• Fits 2011-2013 Toyota Corolla, Upstream, Fits Japan built vehicles; OE Style
• Fits 2009-2010 Pontiac Vibe, Upstream, OE Style

Common Replacement Uses

• Replacing a failed upstream air/fuel ratio sensor
• Addressing check engine light concerns tied to mixture feedback
• Restoring proper fuel-trim signal input to the engine computer
• Correcting drivability issues related to inaccurate sensor readings
• Servicing emissions control faults on OE-style applications

Installation Notes

Confirm the connector style, wire count, thread diameter, and upstream location before installation. This sensor is a specific-fit part, so matching the vehicle application and Japan-built note for 2011-2013 Toyota Corolla models is important. Use the existing harness routing and follow factory service procedures for removal and installation.

Quality Assurance

Denso builds this OE Style sensor to strict original-equipment standards and tests each component for replacement accuracy and first-time fit. The 234-9301 is intended to deliver the correct part and fit for the listed Toyota, Lexus, and Pontiac applications.