Denso 234-9114 Air / Fuel Ratio Sensor

Denso OE Style Air/Fuel Ratio Sensor

Denso 234-9114 is an OE Style heated air/fuel ratio sensor built for specific-fit replacement in select Toyota, Lexus, and Scion applications. It is precision-built and tested to OE standards for accurate fitment and dependable signal performance in upstream sensor locations.

Key Features

• OE Style replacement air/fuel ratio sensor for specific applications
• Heated sensor design for faster operating temperature
• 4-wire configuration with 12.40 wiring harness length
• Direct-fit design for first-time fit on listed vehicles
• Cross-references Bosch 15486 and NTK 24851 for the same application

Detailed Description

This Denso air/fuel ratio sensor, part number 234-9114, is engineered as a direct replacement for upstream sensor positions on select Toyota RAV4, Highlander, Sienna, Venza, Lexus RX350, RX450h, and Scion tC models. The OE Style line focuses on exact replacement dimensions and connector fit, helping maintain proper exhaust feedback for engine management systems. If you are replacing a worn upstream sensor on a 2013-2018 Toyota RAV4 or a 2011-2016 Scion tC, this sensor matches the listed application requirements.

Denso manufactures and tests these sensors to OE standards, with attention to fit, wiring length, and sensor response. The 234-9114 part number is also referenced by several OEM and aftermarket numbers, making it a practical choice when matching an existing sensor by cross-reference.

What This Sensor Helps Address

• Check engine light related to air/fuel ratio sensor faults
• Rough idle or unstable fuel control from a failing upstream sensor
• Incorrect exhaust feedback readings affecting engine management
• Hard starting or drivability issues tied to sensor signal degradation
• Replacement needs after sensor contamination or age-related wear

Installation Notes and Fitment

Fits 2013-2018 Toyota RAV4, upstream. Fits 2017 Toyota Highlander, upstream left. Fits 2011-2016 Scion tC, upstream. Fits 2014-2016 Toyota Highlander, upstream left. Fits 2015 Lexus RX450h, upstream rear. Fits 2015 Toyota Sienna, upstream right, to 09/2014. Fits 2012-2014 Lexus RX350, upstream right. Fits 2011-2014 Lexus RX450h, upstream right. Fits 2012-2014 Toyota Sienna, upstream right. Fits 2012-2014 Toyota Venza, upstream right. Fits 2011-2013 Toyota Highlander, upstream right. Fits 2011 Lexus RX350, upstream right, USA built.

Verify the sensor position and connector match before installation. This is a specific-fit, heated 4-wire sensor, so confirm the vehicle’s upstream location and harness routing against the original part. For Toyota RAV4, Lexus RX350, and related applications, matching the exact position is important for proper installation.

Quality Assurance

Denso OE Style sensors are manufactured and tested to strict OE standards for accurate replacement fit and consistent performance. The precision-built design supports direct replacement on the listed Toyota, Lexus, and Scion applications, including part number 234-9114.