Denso 234-9051 Air / Fuel Ratio Sensor - Upstream, Upstream Left or Upstream Right

Denso OE Style Air/Fuel Ratio Sensor

Denso 234-9051 is an OE Style heated air/fuel ratio sensor built for exact replacement and a first-time fit. It is a specific-fit sensor with a 4-wire design, male connector, and 8.66-inch wiring harness length for direct service on select Lexus and Toyota applications.

Key Features

• Heated air/fuel ratio sensor for precise exhaust feedback
• Specific fit for direct replacement on listed applications
• 4-wire configuration with male connector
• 8.66-inch wiring harness length
• Thread diameter: 0.711
• OE Style design for Lexus LS460, GS350, IS250, GX470, and Toyota 4Runner applications

Detailed Description

Denso 234-9051 is engineered to match OE-style fitment and sensor performance for upstream air/fuel ratio monitoring. Denso manufactures and tests these sensors to OE standards, with precision-built components intended to match the original part dimensions and electrical layout. This helps maintain accurate feedback for the engine control system on vehicles such as the Lexus GS350, Lexus IS250, Lexus LS460, Toyota 4Runner, and Toyota Tacoma.

This part cross-references Bosch 15101 and NTK 24833 for the same application. It also aligns with multiple Toyota and Lexus OE part numbers listed in the interchange data, making it a practical replacement choice when servicing upstream sensor faults on select 2005-2013 Lexus and Toyota models.

What It Helps Address

• Check engine light related to upstream air/fuel ratio sensor faults
• Incorrect fuel trim readings from a worn sensor
• Rough idle or hesitation caused by inaccurate exhaust feedback
• Failed emissions inspection tied to sensor performance
• Driveability issues on Lexus and Toyota engines using upstream sensor monitoring

Installation Notes and Tips

Confirm the exact position before ordering, since this sensor is listed for upstream, upstream left, and upstream right locations depending on the vehicle. Verify the connector style, wire count, and thread diameter against the original sensor before installation. Fitment includes select 2005-2013 Lexus LS460, GS350, IS250, GX470, and Toyota 4Runner, Tacoma, Tundra, Sequoia, FJ Cruiser, Land Cruiser, and LX470 applications with year- and VIN-specific notes where shown.

Quality Assurance

Denso builds this OE Style sensor to strict original-equipment standards and tests each component for replacement accuracy and proper fit. The 234-9051 is intended to deliver the correct part and the correct fit for the listed Lexus and Toyota applications the first time.