Denso 234-4661 Oxygen Sensor - Downstream or Downstream Right

Reliable Oxygen Sensor for Acura, Audi, and Volkswagen Models

The Denso OE Style 234-4661 oxygen sensor is designed specifically for select Acura, Audi, and Volkswagen vehicles. This heated oxygen sensor ensures accurate emissions control and optimal engine performance by providing precise air-fuel mixture data to the engine management system.

• Heated sensor type for faster response times
• Specific fit for Acura RLX and Audi A4, A4 Quattro, A6, A6 Quattro, Cabriolet, and Volkswagen Passat
• 67.72 inches wiring harness length for proper installation
• Threaded mounting type with 0.708 inch thread diameter
• Four-wire design with male connector for secure connection

About the Denso OE Style Product Line

The Denso OE Style line offers oxygen sensors engineered to meet original equipment specifications. The 234-4661 sensor maintains factory-level fit, form, and function, ensuring compatibility and reliable performance for the specified Acura, Audi, and Volkswagen models. This product line focuses on delivering precise sensor operation to support emissions compliance and engine efficiency.

Product Features and Technical Details

This oxygen sensor features a heated element that allows it to reach operating temperature quickly, improving sensor response and reducing emissions during cold starts. The 67.72-inch wiring harness length provides sufficient reach for proper routing in the engine bay. Its four-wire configuration includes two wires for the heating element and two for the sensor signal, ensuring accurate data transmission. The sensor mounts via a threaded connection with a 0.708-inch diameter, matching factory specifications for a secure fit. The male connector design facilitates straightforward installation and reliable electrical contact.

Common Applications and Issues Addressed

• Restores accurate air-fuel ratio readings for improved fuel efficiency
• Helps resolve check engine light codes related to oxygen sensor failure
• Reduces vehicle emissions by ensuring proper catalytic converter function
• Improves engine performance and drivability in Acura RLX and Audi A4, A6 series
• Prevents rough idling and hesitation caused by faulty oxygen sensors

Installation Notes and Tips

Ensure the vehicle is cool before beginning installation to avoid burns. Disconnect the battery to prevent electrical shorts. Remove the old oxygen sensor carefully using an appropriate oxygen sensor socket. Verify the thread size and connector type match the Denso 234-4661 sensor. Route the wiring harness away from hot exhaust components and secure it to prevent damage. After installation, clear any diagnostic trouble codes and perform a test drive to confirm proper operation.

Quality Assurance and Warranty

Denso OE Style oxygen sensors are manufactured to meet strict quality standards and original equipment specifications. The 234-4661 part undergoes rigorous testing to ensure durability and accurate sensor performance. While specific warranty details may vary, Denso typically offers coverage against defects in materials and workmanship to provide confidence in product reliability.