Denso 234-9026 Air / Fuel Ratio Sensor - Upstream

Denso OE Style Air/Fuel Ratio Sensor

Denso 234-9026 is a heated air/fuel ratio sensor built to OE-style standards for direct replacement on select Toyota and Lexus applications. It is a specific-fit sensor with a 4-wire design, male connector, and 7.09-inch wiring harness length for a precise match to the original setup.

Compatible With 2005-2013 Toyota Tundra upstream, 2008-2012 Toyota Sequoia upstream, and 2010-2013 Lexus GX460 upstream, this Denso air/fuel ratio sensor also covers additional upstream Toyota and Lexus fitments listed below. The Denso OE Style line focuses on exact replacement and first-time fit for service work that demands correct sensor configuration.

Key Features

• Heated air/fuel ratio sensor for upstream exhaust placement
• Specific-fit design for direct replacement applications
• 4-wire configuration with male connector
• 7.09-inch wiring harness length
• Thread diameter: 0.711
• OE Style product line for factory-like fit and form
• Part number: 234-9026

Detailed Description

Denso 234-9026 is engineered for vehicles that require an upstream air/fuel ratio sensor with OE-style dimensions and connector layout. It is a direct-fit replacement for select Toyota Tundra, Toyota Sequoia, Toyota 4Runner, Toyota FJ Cruiser, Toyota Tacoma, Toyota Land Cruiser, Lexus GX460, and Lexus LX570 applications. This part cross-references Bosch 13996 and NTK 24661 for the same application.

As part of Denso’s OE Style line, this sensor is built around exact replacement requirements so the sensor body, wiring, and connector match the original installation point. That makes it a practical choice for restoring proper upstream sensor function on Toyota and Lexus platforms where accurate air/fuel ratio feedback is critical.

What It Helps Address

• Check engine light related to upstream air/fuel ratio sensor faults
• Rough idle caused by inaccurate exhaust oxygen feedback
• Fuel trim issues from a slow or failing sensor signal
• Emissions test failures tied to sensor performance
• Driveability problems on Toyota Tundra, Tacoma, Sequoia, and Lexus GX460 applications

Installation Notes and Tips

Verify the upstream position, connector style, wire count, and thread diameter before installation. This is a specific-fit sensor, so matching the vehicle year, make, model, and engine application is important. For best results, compare the original sensor routing and connector orientation before removal, especially on 2007-2013 Toyota Tundra and 2010-2013 Lexus GX460 applications.

• Fits 2010-2013 Lexus GX460, upstream
• Fits 2008-2011 Lexus LX570, upstream
• Fits 2008-2011 Toyota Land Cruiser, upstream
• Fits 2008-2013 Toyota Tundra, upstream
• Fits 2008-2012 Toyota Sequoia, upstream
• Fits 2008-2009 Toyota 4Runner, upstream
• Fits 2008-2009 Toyota FJ Cruiser, upstream
• Fits 2007-2008 Toyota Tacoma, upstream
• Fits 2007 Toyota 4Runner, upstream, from 06/07
• Fits 2007 Toyota Tundra, upstream, from VIN 5TE*U##N#6Z144911 (NUMMI) or 3TM*U##N#6M003084 (TMMBC)
• Fits 2005-2006 Toyota Tacoma, upstream, from VIN 5TE*U##N#6Z144911 (NUMMI) or 3TM*U##N#6M003084 (TMMBC)
• Fits 2005 Toyota Tundra, upstream

Quality Assurance

Denso manufactures and tests this sensor to OE standards for consistent replacement quality and first-time fit. The OE Style designation reflects a factory-matched approach to form, function, and application coverage for select Toyota and Lexus vehicles.