Denso 234-4664 Oxygen Sensor - Downstream or Upstream

Overview of Denso OE Style Oxygen Sensor 234-4664

The Denso OE Style Oxygen Sensor 234-4664 is designed specifically for select Audi and Volkswagen models, including the A4, A6, A8, Golf, Jetta, Passat, and EuroVan. This heated oxygen sensor ensures accurate air-fuel mixture readings to support optimal engine performance and emissions control.

• Heated sensor type for faster activation and improved efficiency
• Specific fit for Audi and Volkswagen vehicles, including Quattro models
• Threaded mounting type with 0.708-inch thread diameter for secure installation
• Four-wire design with male connector for reliable electrical connection
• Wiring harness length of 30.91 inches to accommodate factory routing

Details on the Denso OE Style Product Line

The OE Style line from Denso focuses on delivering oxygen sensors that meet original equipment specifications. This ensures compatibility and performance consistent with factory-installed parts. The 234-4664 sensor maintains the quality and fitment standards expected in Audi and Volkswagen vehicles, providing a direct replacement solution without modification.

Product Features and Specifications

This oxygen sensor features a heated element to reduce warm-up time, allowing the engine control unit to receive accurate oxygen level data sooner. The four-wire configuration supports both the sensor signal and heater circuit, enhancing responsiveness and durability. The threaded mounting type with a 0.708-inch diameter ensures a secure fit in the exhaust system. The 30.91-inch wiring harness length is designed to match the original sensor’s routing, simplifying installation.

Common Applications and Problem Resolution

• Helps correct engine misfires caused by inaccurate air-fuel mixture readings
• Reduces emissions by providing precise oxygen level data to the ECU
• Addresses check engine light triggers related to oxygen sensor faults
• Improves fuel efficiency by enabling proper combustion adjustments
• Prevents rough idling and poor acceleration linked to sensor failure

Installation Notes and Tips

When installing the Denso 234-4664 oxygen sensor, ensure the vehicle is compatible with this specific fit sensor, including Audi A4, A6, A8, and Volkswagen Golf, Jetta, Passat, and EuroVan models. Use appropriate tools to avoid damaging the threaded mounting. Verify the wiring harness length and connector gender match the factory setup to ensure proper connection. It is recommended to replace the sensor when the engine is cool to prevent burns and to apply anti-seize compound on the threads if not pre-applied.

Quality Assurance and Warranty

Denso OE Style oxygen sensors are manufactured to meet or exceed OEM standards for durability and performance. The 234-4664 part undergoes rigorous testing to ensure reliable operation under various driving conditions. While specific warranty details may vary, Denso typically offers coverage against defects in materials and workmanship, providing confidence in the sensor’s longevity and function.