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

Overview of the Denso OE Style Air/Fuel Ratio Sensor

The Denso OE Style Air/Fuel Ratio Sensor 234-9058 is designed specifically for select Lexus and Toyota models, including the GS300, GS350, GS450h, Highlander, IS250, IS F, and LS460. This heated sensor ensures accurate air and fuel mixture readings to support optimal engine performance and emissions control.

• Heated sensor type for faster response times
• Specific fitment for Lexus and Toyota vehicles
• 11.42-inch wiring harness length for precise installation
• Four-wire configuration with male connector
• Thread diameter of 0.711 inches for secure mounting
• Regular grade type for reliable operation

Detailed Product Description

The Denso 234-9058 air/fuel ratio sensor is engineered to provide accurate oxygen level readings in the exhaust stream, enabling the engine control unit to adjust fuel delivery efficiently. Featuring a heated sensor element, it reaches operating temperature quickly, reducing emissions during cold starts. The 11.42-inch wiring harness length and four-wire design with a male connector ensure compatibility and ease of installation in the specified Lexus and Toyota models. The sensor’s thread diameter of 0.711 inches matches OEM specifications, maintaining a secure and leak-free fit.

About the Denso OE Style Product Line

The OE Style line from Denso focuses on delivering parts that meet original equipment specifications for fit, form, and function. This air/fuel ratio sensor is part of that line, providing a direct replacement solution that aligns with factory standards. Choosing the OE Style sensor helps maintain the integrity of your vehicle’s emission control system without compromising performance.

Common Applications and Issues Addressed

• Restores accurate air/fuel mixture readings for Lexus GS300, GS350, GS450h, Highlander, IS250, IS F, and LS460
• Helps resolve rough idling and poor fuel economy caused by faulty sensors
• Reduces emissions by ensuring proper sensor operation
• Prevents check engine light triggers related to oxygen sensor faults
• Improves engine performance by maintaining correct fuel ratios

Installation Notes and Tips

• Verify vehicle compatibility with the Denso 234-9058 part number before installation
• Ensure the wiring harness length of 11.42 inches is suitable for your vehicle’s sensor location
• Use proper tools to avoid damaging the 0.711-inch thread diameter during installation
• Check connector gender (male) for compatibility with existing wiring harness
• Follow manufacturer torque specifications to secure the sensor properly

Quality Assurance and Warranty

Denso manufactures the 234-9058 air/fuel ratio sensor to meet strict quality standards, ensuring reliable performance and durability. As part of the OE Style product line, this sensor is designed to match original equipment specifications. Warranty coverage details should be confirmed with the point of purchase or manufacturer documentation.