Denso 234-9140 Air / Fuel Ratio Sensor - Upstream, Upstream Left or Upstream Right

Denso OE Style Air/Fuel Ratio Sensor

Denso 234-9140 is an OE Style heated air/fuel ratio sensor built for direct replacement on select Lexus and Toyota applications. It is engineered for specific fitment, 4-wire operation, and a 13.46-inch wiring harness length for a clean, factory-style installation.

For drivers searching for a Lexus ES350 upstream left air fuel ratio sensor or a Toyota Camry upstream left oxygen sensor replacement, this Denso part number 234-9140 matches the vehicle-specific applications listed below.

Key Features

• Heated air/fuel ratio sensor for precise exhaust feedback
• Specific fit design for direct replacement applications
• 4-wire configuration
• 13.46-inch wiring harness length
• OE Style construction for factory-style replacement
• Regular grade type

OE Style Construction

Denso’s OE Style line focuses on direct replacement parts built and tested to OE standards. The sensor is precision-built for exact replacement and first-time fit, helping maintain the original sensor location and connector layout on supported Lexus and Toyota vehicles. This part cross-references NTK 24661 for the same application.

What This Sensor Helps Address

• Check engine light related to air/fuel ratio sensor performance
• Rough idle caused by inaccurate exhaust feedback
• Fuel trim issues from a slow or faulty upstream sensor
• Emissions test failures tied to sensor response problems
• Driveability concerns on Lexus ES350, Toyota Camry, and related applications

Fitment and Application Notes

• Fits 2023-2024 Lexus ES350, Upstream Left
• Fits 2020 Lexus ES350, Upstream Left
• Fits 2018-2024 Lexus IS300, Upstream Right
• Fits 2018-2024 Lexus IS350, Upstream Right
• Fits 2022-2024 Lexus IS500, Upstream Left
• Fits 2020-2024 Lexus LC500, Upstream Left
• Fits 2020-2024 Lexus RC F, Upstream Left
• Fits 2020-2024 Lexus RC300, Upstream Right
• Fits 2020-2024 Lexus RC350, Upstream Right
• Fits 2020-2024 Toyota Camry, Upstream Left
• Fits 2020-2023 Toyota Tacoma, Upstream
• Fits 2021-2022 Lexus ES350, Upstream Left
• Fits 2020-2022 Toyota Avalon, Upstream Left
• Fits 2020-2022 Toyota C-HR, Upstream
• Fits 2020-2022 Toyota Corolla, Upstream
• Fits 2020 Lexus GS F, Upstream Left
• Fits 2020 Lexus GS350, Upstream Right
• Fits 2019 Lexus ES350, Upstream Left
• Fits 2016-2019 Lexus GS F, Upstream Left
• Fits 2014-2019 Lexus GS350, Upstream Right
• Fits 2018-2019 Lexus LC500, Upstream Left
• Fits 2015-2019 Lexus RC F, Upstream Left
• Fits 2016-2019 Lexus RC300, Upstream Right
• Fits 2015-2019 Lexus RC350, Upstream Right
• Fits 2019 Lexus RX350, Upstream Right
• Fits 2019 Toyota Avalon, Upstream Left
• Fits 2018-2019 Toyota C-HR, Upstream
• Fits 2018-2019 Toyota Camry, Upstream Left
• Fits 2014-2019 Toyota Corolla, Upstream
• Fits 2016-2019 Toyota Tacoma, Upstream
• Fits 2015-2018 Lexus GS450h, Upstream Left
• Fits 2017-2018 Toyota Corolla iM, Upstream
• Fits 2016-2017 Lexus IS300, Upstream Right
• Fits 2014-2017 Lexus IS350, Upstream Right
• Fits 2016 Scion iM, Upstream
• Fits 2014-2015 Lexus IS250, Upstream Right

Installation Notes

Confirm the sensor position before ordering, since this part is listed for upstream left, upstream right, and upstream applications depending on vehicle. Match the connector style, harness length, and wire count to the original sensor before installation. For best results, inspect the exhaust threads and wiring routing during replacement on Lexus ES350, Toyota Camry, and other supported models.

Quality Assurance

Denso manufactures and tests this OE Style sensor to OE standards for direct replacement performance and accurate fitment on the listed applications.