Denso 234-4055 Oxygen Sensor - Downstream or Upstream

Overview of the Denso OE Style Oxygen Sensor 234-4055

The Denso OE Style Oxygen Sensor 234-4055 is designed specifically for Toyota 4Runner, Pickup, and Van models. This heated oxygen sensor features a 20.87-inch wiring harness and a four-wire configuration to ensure precise emission control and optimal engine performance.

• Heated oxygen sensor for faster activation
• Specific fit for Toyota 4Runner, Pickup, and Van
• Four-wire design for accurate signal transmission
• 20.87-inch wiring harness length for proper installation
• Part number 234-4055 for exact replacement

Detailed Product Description

The Denso OE Style oxygen sensor 234-4055 is engineered to meet the exact specifications of the original equipment for Toyota vehicles including the 4Runner, Pickup, and Van. This sensor uses a heated element to reduce warm-up time, allowing the engine control unit to receive accurate oxygen level readings sooner. The four-wire design supports both the sensor signal and heater circuit, improving reliability and sensor response. With a wiring harness length of 20.87 inches, this sensor is designed for a precise fit and straightforward installation in the designated Toyota models.

About the Denso OE Style Product Line

The OE Style product line from Denso focuses on providing replacement parts that closely match the original equipment specifications. This ensures compatibility and performance consistent with factory-installed components. The 234-4055 oxygen sensor is part of this line, offering a direct fit and function for Toyota 4Runner, Pickup, and Van vehicles, maintaining emission control system integrity.

Common Applications and Issues Addressed

• Restores proper air-fuel mixture readings for engine control
• Helps resolve rough idling and poor fuel economy
• Reduces emissions by ensuring accurate sensor data
• Prevents check engine light related to oxygen sensor faults
• Improves overall engine performance and drivability

Installation Notes and Tips

When installing the Denso 234-4055 oxygen sensor, ensure the vehicle is cool to avoid burns. Use an oxygen sensor socket or appropriate tool to remove the old sensor carefully. Verify the wiring harness length and connector match the original sensor to avoid electrical issues. Follow torque specifications recommended by Toyota to prevent damage to the sensor or exhaust system.

Quality Assurance and Warranty

Denso manufactures the 234-4055 oxygen sensor to meet strict quality standards, ensuring durability and reliable performance. As part of the OE Style line, this sensor is designed to match original equipment specifications. Warranty coverage details should be confirmed with the point of purchase or manufacturer documentation.