Denso 234-5185 Air / Fuel Ratio Sensor - Upstream

Overview of the Denso OE Style Air/Fuel Ratio Sensor

The Denso OE Style Air/Fuel Ratio Sensor 234-5185 is designed specifically for select Audi and Volkswagen models. This heated sensor ensures accurate air and fuel mixture readings to support optimal engine performance and emissions control.

• Heated sensor type for faster response times
• Specific fit for Audi and Volkswagen vehicles
• 26.89-inch wiring harness length for precise installation
• Five-wire configuration with male connector
• Thread diameter of 0.708 inches for secure mounting
• Regular grade type for reliable operation

Detailed Product Description

The Denso 234-5185 air/fuel ratio sensor is engineered to meet the exact specifications of the OE Style product line, providing a direct replacement for factory-installed sensors. This sensor features a heated element that allows it to reach operating temperature quickly, improving fuel efficiency and reducing emissions. The 26.89-inch wiring harness length and five-wire setup with a male connector ensure compatibility and ease of installation in vehicles such as the Audi A3, A3 Quattro, S3, TT Quattro, TTS Quattro, and Volkswagen Golf R, GTI, Atlas, Atlas Cross Sport, Q3, and Tiguan.

The OE Style line from Denso focuses on delivering parts that match original equipment specifications, ensuring proper fit, function, and durability. This air/fuel ratio sensor is designed to maintain the performance and emissions standards expected from the original sensor installed by the manufacturer.

Common Applications and Issues Addressed

• Helps correct inaccurate air/fuel mixture readings
• Resolves engine performance problems related to faulty sensors
• Reduces rough idling and hesitation during acceleration
• Improves fuel economy by providing precise sensor data
• Supports emission control compliance for Audi and Volkswagen models

Installation Notes and Tips

• Ensure the vehicle is cool before sensor replacement to avoid burns
• Use the correct thread diameter (0.708 inches) for proper sensor seating
• Verify the wiring harness length (26.89 inches) fits your vehicle’s routing path
• Check connector gender (male) compatibility with the vehicle’s wiring harness
• Follow manufacturer torque specifications to avoid sensor damage

Quality Assurance and Warranty

Denso’s OE Style air/fuel ratio sensor 234-5185 is manufactured to meet strict quality standards, ensuring reliable performance and durability. While specific warranty details may vary, Denso parts typically come with a limited warranty covering defects in materials and workmanship, providing confidence in the sensor’s long-term operation.