Denso 234-4139 Oxygen Sensor - Downstream or Downstream Front

Overview of the Denso OE Style Oxygen Sensor 234-4139

The Denso OE Style Oxygen Sensor 234-4139 is designed specifically for select Lexus and Toyota models, including the Celica and SC300. This heated oxygen sensor ensures accurate emissions control and optimal engine performance by monitoring exhaust gases effectively.

• Heated sensor type for faster response times
• Specific fit for Lexus and Toyota Celica and SC300 models
• Threaded mounting type with 0.708 inch thread diameter
• 25.59 inches wiring harness length for precise installation
• Four-wire configuration with male connector for secure connection

Detailed Features and Specifications

The Denso 234-4139 oxygen sensor features a heated sensor element that allows it to reach operating temperature quickly, improving fuel efficiency and reducing emissions. Its specific fitment ensures compatibility with Lexus and Toyota Celica and SC300 vehicles, providing a direct replacement without modification. The sensor includes a 25.59-inch wiring harness, allowing for proper routing and connection within the engine bay. The four-wire design supports both the sensor signal and heater circuit, while the male connector ensures a reliable electrical connection. The threaded mounting type with a 0.708-inch diameter allows for secure installation in the exhaust system.

About the OE Style Product Line

The Denso OE Style line is engineered to meet original equipment specifications, offering a balance of quality and value. This product line focuses on delivering sensors that match the fit, form, and function of factory-installed parts. The 234-4139 oxygen sensor from the OE Style series is designed to provide consistent performance and durability for Lexus and Toyota vehicles, maintaining proper emissions control and engine management.

Common Applications and Problem Solving

• Restores accurate oxygen sensing for proper air-fuel mixture control
• Helps resolve check engine light issues related to oxygen sensor faults
• Improves fuel economy by ensuring correct sensor feedback
• Reduces harmful emissions by maintaining proper exhaust monitoring
• Prevents engine performance problems caused by faulty sensor readings

Installation Notes and Tips

When installing the Denso 234-4139 oxygen sensor, ensure the vehicle is compatible with this specific fit sensor, including Lexus and Toyota Celica and SC300 models. Use appropriate tools to avoid damaging the threaded mounting. Verify the wiring harness length of 25.59 inches is sufficient for your vehicle’s routing needs. Confirm the four-wire male connector matches the vehicle’s harness for a secure connection. It is recommended to replace the sensor when the engine and exhaust system are cool to prevent injury.

Quality Assurance and Warranty

Denso manufactures the 234-4139 oxygen sensor to meet strict quality standards, ensuring reliable performance and durability. The OE Style product line is designed to meet original equipment specifications, providing confidence in fit and function. Warranty coverage details should be confirmed with the point of purchase or manufacturer documentation.