Denso 234-4809 Oxygen Sensor - Downstream, Downstream Left or Downstream Right

Overview of the Denso OE Style Oxygen Sensor 234-4809

The Denso OE Style Oxygen Sensor 234-4809 is designed for precise emission control in select Audi, Bentley, Porsche, and Volkswagen vehicles. This heated oxygen sensor ensures accurate air-fuel mixture readings to maintain optimal engine performance and emissions compliance.

• Heated sensor type for faster response times
• Specific fit for models including Audi A4 Quattro, Bentley Continental, Porsche Cayenne, and Volkswagen Golf
• 67.32-inch wiring harness length for flexible installation
• Threaded mounting with 0.708-inch thread diameter
• Four-wire design with male connector for reliable electrical connection

Detailed Product Features and Specifications

The Denso 234-4809 oxygen sensor features a heated sensor element that allows it to reach operating temperature quickly, improving fuel efficiency and reducing emissions. Its 67.32-inch wiring harness length provides ample reach for installation in the exhaust system. The sensor is designed with a threaded mounting type and a 0.708-inch thread diameter, ensuring a secure and precise fit. The four-wire configuration with a male connector supports proper signal transmission and heater circuit operation. This sensor is a specific fit for various models such as the Audi A4, A8 Quattro, Bentley Continental, Porsche Cayenne, and Volkswagen Passat, among others.

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. The 234-4809 oxygen sensor is engineered to match the performance and durability standards of the original sensor installed by the vehicle manufacturer. This ensures compatibility and reliable operation within the emission control system of the specified vehicles.

Common Applications and Issues Addressed

• Restores accurate oxygen sensing for proper air-fuel ratio management
• Helps resolve engine performance issues such as rough idling or hesitation
• Reduces emissions by ensuring correct fuel mixture adjustments
• Prevents check engine light triggers related to oxygen sensor faults
• Supports compliance with emission regulations for Audi, Bentley, Porsche, and Volkswagen models

Installation Notes and Tips

When installing the Denso 234-4809 oxygen sensor, ensure the vehicle is cool to avoid burns. Use appropriate tools to remove the old sensor and avoid damaging the wiring harness. Verify the sensor’s connector matches the vehicle’s male connector and confirm the thread diameter fits the exhaust port. Proper torque specifications should be followed to prevent leaks or sensor damage.

Quality Assurance and Warranty

Denso oxygen sensors are manufactured to meet strict quality standards and undergo rigorous testing to ensure durability and performance. The OE Style 234-4809 sensor is backed by Denso’s quality assurance protocols. Please refer to Denso’s warranty terms for specific coverage details.