Denso 234-9048 Air / Fuel Ratio Sensor - Upstream, Upstream Left or Upstream Right

OE Style Air/Fuel Ratio Sensor for Lexus

This Denso OE Style air/fuel ratio sensor is built for precise replacement and first-time fit on select Lexus applications. It uses a heated, 4-wire design with a specific-fit connector layout to match the original sensor configuration.

Part number 234-9048 is engineered to meet strict OE standards for measurement accuracy and consistent signal response. It is a direct-fit choice for upstream sensor locations on Lexus LS460, HS250h, IS F, IS350, GS350, GS460, and IS250 applications.

Key Features

• Brand: Denso OE Style
• Part number: 234-9048
• Heated air/fuel ratio sensor
• Specific fit for direct replacement
• 4-wire design with male connector
• Wiring harness length: 10.83
• Thread diameter: 0.711
• Built and tested to OE standards

Product Details

Denso OE Style sensors are precision-built to match original equipment dimensions and electrical requirements. This helps maintain accurate air/fuel feedback for the engine control system, especially in upstream positions where sensor response is critical. The 234-9048 is a direct replacement for select Lexus models and is cross-referenced to Bosch 13996 and NTK 24661 for the same application.

Compatible With 2010-2013 Lexus LS460, Upstream Right; 2010-2012 Lexus HS250h, Upstream; 2008-2012 Lexus IS F, Upstream; 2009-2012 Lexus IS350, Upstream Right; 2009-2011 Lexus GS350, Upstream Right; 2008-2011 Lexus GS460, Upstream Left; 2009-2011 Lexus IS250, Upstream Right; and 2008 Lexus GS350, IS250, and IS350 upstream right applications with the listed production notes.

Common Issues This Sensor Can Address

• Check engine light related to air/fuel ratio sensor performance
• Rough idle caused by inaccurate upstream sensor readings
• Fuel trim problems from delayed or inconsistent sensor response
• Emissions test failures tied to sensor fault codes
• Poor drivability from a worn or contaminated original sensor

Installation Notes and Tips

Verify the connector style, wire count, and upstream position before installation. Confirm the thread diameter and harness length match the original sensor, and check the vehicle build date notes for 2008 Lexus GS350, IS250, and IS350 applications. For best results, compare the old sensor to the replacement before final tightening.

Quality Assurance

Denso manufactures and tests this OE Style sensor to strict original-equipment standards for fit and performance. The precision-built design supports accurate replacement on the specified Lexus applications, including LS460, HS250h, IS F, GS350, GS460, and IS250 models.