Denso 234-9056 Air / Fuel Ratio Sensor - Upstream

Reliable Air/Fuel Ratio Sensor for Toyota and Scion Vehicles

The Denso OE Style Air/Fuel Ratio Sensor 234-9056 is designed specifically for select Toyota and Scion models, including the Corolla, Matrix, Prius, and xD. This heated sensor ensures accurate monitoring of the air-fuel mixture to support optimal engine performance and emissions control.

• Heated sensor type for faster response times
• Specific fit for Toyota Corolla, Matrix, Prius, and Scion xD
• 14.25-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 standard durability and performance

About the Denso OE Style Product Line

The OE Style line by Denso offers components engineered to meet original equipment specifications. This ensures that the 234-9056 Air/Fuel Ratio Sensor maintains compatibility and performance consistent with factory-installed parts. The OE Style sensors are designed to integrate seamlessly with your vehicle’s existing systems, providing reliable emissions control and sensor accuracy.

Detailed Product Description

This Denso Air/Fuel Ratio Sensor 234-9056 features a heated sensor element that allows it to reach operating temperature quickly, improving the accuracy of air-fuel mixture readings. The sensor’s 14.25-inch wiring harness length and four-wire design with a male connector facilitate straightforward installation and secure electrical connections. Its specific fitment for Toyota Corolla, Matrix, Prius, and Scion xD models ensures compatibility without the need for modifications. The 0.711-inch thread diameter provides a proper seal and mounting stability, while the regular grade type balances durability with cost-effectiveness.

Common Issues Addressed by This Sensor

• Incorrect air-fuel mixture readings causing poor fuel economy
• Check engine light triggered by faulty sensor signals
• Increased emissions due to improper combustion
• Engine performance issues such as rough idling or hesitation
• Failed emissions tests related to sensor malfunction

Installation Notes and Tips

• Ensure the vehicle is cool before sensor removal to avoid burns
• Use the correct tools to avoid damaging the 0.711-inch thread
• Verify connector type matches the male connector on the sensor
• Check wiring harness length (14.25 inches) for proper routing
• Follow vehicle-specific torque specifications during installation

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 products typically come with a limited warranty covering defects in materials and workmanship. This ensures dependable performance and peace of mind when replacing your vehicle’s air/fuel ratio sensor.