Denso 234-9047 Air / Fuel Ratio Sensor - Upstream or Upstream Rear

Overview of the Denso OE Style Air/Fuel Ratio Sensor

The Denso OE Style Air/Fuel Ratio Sensor 234-9047 is designed for precise emission control in select Lexus, Subaru, and Toyota vehicles. This heated sensor ensures accurate air-fuel mixture readings to support optimal engine performance and emissions compliance.

• Heated sensor type for faster response times
• Specific fit for Lexus 4Runner, Toyota Camry, ES300, and Subaru Outback, Legacy, Tribeca models
• 7.87-inch wiring harness length for proper installation
• Four-wire configuration with male connector
• Thread diameter of 0.711 inches for secure mounting
• Regular grade type for standard durability and performance

Detailed Product Description

The Denso 234-9047 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, improving sensor responsiveness and reducing emissions during cold starts. The 7.87-inch wiring harness length and four-wire design with a male connector ensure compatibility and ease of connection with the vehicle’s existing wiring harness. This sensor is a specific fit for Lexus 4Runner, Subaru B9 Tribeca, Legacy, Outback, and Toyota Camry and ES300 models, ensuring proper integration without modification. The thread diameter of 0.711 inches matches OEM specifications for secure installation.

About the OE Style Product Line

The Denso OE Style line focuses on delivering parts that meet original equipment specifications for fit, form, and function. The 234-9047 air/fuel ratio sensor from this line is designed to match the performance and durability of the factory-installed sensor, providing a reliable replacement option for emission control systems in compatible Lexus, Subaru, and Toyota vehicles.

Common Applications and Issues Addressed

• Helps maintain proper air/fuel mixture for efficient combustion
• Reduces engine hesitation and rough idling caused by faulty sensors
• Prevents increased emissions and failed emissions tests
• Addresses check engine light triggers related to oxygen sensor faults
• Improves fuel economy by ensuring accurate sensor feedback

Installation Notes and Tips

Ensure the vehicle is cool before installation to avoid injury. Disconnect the battery prior to sensor replacement to prevent electrical shorts. Use the correct thread diameter (0.711 inches) to avoid cross-threading. Verify the four-wire harness and male connector match the vehicle’s wiring harness. After installation, clear any diagnostic trouble codes and perform a test drive to confirm proper sensor operation.

Quality Assurance and Warranty

Denso OE Style sensors are manufactured to meet strict quality standards consistent with original equipment. While specific warranty details may vary, Denso typically offers coverage against defects in materials and workmanship. Refer to the product documentation or manufacturer for exact warranty terms.