Denso 234-9042 Air / Fuel Ratio Sensor - Upstream, Upstream Front or Upstream Right

Denso OE Style Air/Fuel Ratio Sensor 234-9042

Denso 234-9042 is an OE Style heated air/fuel ratio sensor built for specific-fit replacement on select Toyota and Lexus applications. It is engineered for direct replacement use on upstream locations, with the connector, wire count, and thread size matched for the listed vehicles.

Key Features

• OE Style replacement air/fuel ratio sensor for precise fitment
• Heated sensor design for faster operating temperature
• Specific fit application with 4-wire configuration
• Male connector and 11.93-inch wiring harness length
• Thread diameter: 0.711
• Built and tested to OE-level standards for replacement accuracy

Product Details

Denso OE Style parts are built as direct-fit replacements, with attention to connector style, harness length, and sensor configuration so the part installs in the intended location without modification. Part number 234-9042 is a heated air/fuel ratio sensor used in upstream positions on select Lexus RX350, RX400h, RX330, ES330, ES300, and Toyota Camry, Highlander, Solara, and Sienna applications. This part cross-references Bosch (e.g., 13735, 15108) for the same application.

For buyers searching for a Toyota Camry upstream front air/fuel ratio sensor, Lexus RX350 upstream right sensor, or a Toyota Highlander upstream sensor replacement, Denso 234-9042 provides an OE-style option matched to the listed fitments. The Denso OE Style line focuses on exact replacement dimensions and first-time fitment for service work on emissions control systems.

What It Helps Address

• Check engine light related to air/fuel ratio sensor performance
• Rough idle or unstable fuel trim readings
• Delayed sensor response during closed-loop operation
• Incorrect upstream exhaust feedback on listed Toyota and Lexus models
• Emissions test failures tied to sensor degradation

Installation Notes

Install only in the listed upstream positions for the confirmed applications: 2011 Lexus RX350 upstream right; 2010 Lexus RX350 upstream right; 2007 Lexus RX350 upstream right; 2006-2008 Lexus RX400h upstream; 2004-2008 Toyota Solara upstream front; 2004-2007 Toyota Highlander upstream; 2004-2006 Lexus ES330 upstream front; 2004-2006 Lexus RX330 upstream; 2002-2006 Toyota Camry upstream front; 2004-2006 Toyota Sienna upstream front; and 2002-2003 Lexus ES300 upstream front. Verify connector orientation, harness routing, and thread size before installation. Use the vehicle’s service procedure for sensor removal and torque specification.

Quality Assurance

Denso manufactures and tests this sensor to strict OE standards for replacement accuracy and fit. The OE Style line is intended to deliver the correct part and the correct fit for the listed Lexus and Toyota applications, including 2002-2011 model-year coverage shown above.