Denso 234-9145 Air / Fuel Ratio Sensor - Upstream, Upstream Left or Upstream Right

Denso OE Style Air/Fuel Ratio Sensor

Denso 234-9145 is an OE Style heated air/fuel ratio sensor built for specific-fit replacement on select Lexus and Toyota applications. It is engineered for direct replacement and first-time fit, with a 4-wire design and 7.40 wiring harness length for the listed upstream positions.

Compatible With Lexus GX460, Lexus LX570, Toyota Land Cruiser, Toyota Sequoia, Toyota Tundra, and other listed applications, this sensor supports accurate exhaust feedback for the engine control system. The Denso OE Style line focuses on exact replacement parts for vehicles that require factory-style fitment and connector layout.

Key Features

• Part number 234-9145
• Heated air/fuel ratio sensor
• Specific fit for listed upstream positions
• 4-wire configuration
• 7.40 wiring harness length
• Regular grade type
• OE Style replacement for select Lexus and Toyota models

Detailed Description

Denso 234-9145 is an emission control sensor designed for upstream placement on a range of Lexus and Toyota vehicles. It is a direct-fit replacement for applications including 2020-2023 Lexus GX460 upstream, 2020-2021 Toyota Sequoia upstream, 2020-2021 Toyota Tundra upstream, and other confirmed fitments such as Lexus LX570, Toyota Land Cruiser, Lexus IS350, Lexus LS460, and Toyota Tacoma. The OE Style construction is intended to match factory specifications for sensor response, connector fit, and harness routing. If you are replacing a worn upstream air/fuel ratio sensor on a Lexus GX460 or Toyota Tundra, 234-9145 provides a vehicle-specific solution.

This part cross-references NTK 24828 and 24849 for the same application.

What It Helps Address

• Check engine light related to air/fuel ratio sensor performance
• Rough idle caused by inaccurate exhaust feedback
• Fuel trim issues from a degraded upstream sensor
• Slow sensor response on affected Lexus and Toyota engines
• Failed emissions inspection tied to sensor faults

Installation Notes and Tips

Verify the exact year, model, and sensor position before ordering. This part is listed for upstream locations only, including upstream right and upstream left on certain applications. Match the connector style, wire count, and harness length to the original sensor before installation. For best results, inspect the exhaust threads and wiring path during replacement, and clear diagnostic trouble codes after the repair is complete.

Quality Assurance

Denso manufactures and tests this OE Style sensor to strict original-equipment standards for fit and performance consistency. The part is built as a specific-fit replacement for the listed vehicles, with attention to exact replacement dimensions and connector compatibility.