Denso 234-9058 Air / Fuel Ratio Sensor - Upstream, Upstream Left or Upstream Right

Denso OE Style Air/Fuel Ratio Sensor

Denso 234-9058 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 11.42-inch wiring harness length for direct service on select Lexus and Toyota applications.

The OE Style line focuses on replacement parts that match original equipment fit and function. For drivers searching for a Denso 234-9058 air/fuel ratio sensor for Lexus GS350, IS250, LS460, or Toyota Highlander service, this sensor is built to meet the same strict standards used in OE testing.

Key Features

• Heated air/fuel ratio sensor for precise exhaust feedback
• Specific fit design for direct replacement service
• 4-wire configuration with male connector
• 11.42-inch wiring harness length
• Thread diameter: 0.711
• OE Style replacement from Denso

Detailed Description

Denso 234-9058 is an emission control sensor used to monitor the air-fuel mixture and support engine management on select Lexus and Toyota vehicles. As an OE Style part, it is precision-built to match original fitment requirements and reduce the guesswork often associated with universal sensors. This makes it a practical choice for repairs where accurate sensor response and correct connector style matter.

Fits 2013-2014 Lexus IS F, upstream; fits 2007-2011 Lexus GS450h, upstream left; fits 2007-2009 Lexus LS460, upstream right; fits 2008 Lexus GS350, upstream right; fits 2008 Lexus IS250, upstream right; fits 2007 Lexus GS350, upstream right; fits 2006-2007 Lexus IS250, upstream right; fits 2006 Lexus GS300, upstream right; fits 2001-2003 Toyota Highlander, upstream, cylinder 2,3. This part cross-references Bosch 13996 and NTK 24661 for the same application.

What It Helps Address

• Check engine light related to air/fuel ratio sensor performance
• Rough idle caused by inaccurate exhaust mixture feedback
• Fuel trim issues from a slow or failing upstream sensor
• Emissions test failures tied to sensor response problems
• Poor drivability from incorrect air-fuel mixture data

Installation Notes and Tips

• Verify the exact position before ordering: upstream, upstream left, or upstream right.
• Confirm connector style, wire count, and harness length against the original sensor.
• Use the vehicle-specific fitment listed for Lexus GS350, IS250, LS460, IS F, GS450h, GS300, and Toyota Highlander applications.
• Inspect the exhaust threads and wiring routing before installation to avoid damage during service.

Quality Assurance

Denso manufactures and tests this sensor to OE standards for replacement accuracy and consistent fit. The OE Style line is intended to deliver the correct part and the correct fit for the listed Lexus and Toyota applications, including Denso 234-9058 service on upstream sensor locations.