Denso 234-5164 Air / Fuel Ratio Sensor - Upstream or Upstream Right

Overview of the Denso OE Style Air/Fuel Ratio Sensor

The Denso OE Style Air/Fuel Ratio Sensor 234-5164 is designed specifically for select Audi models, including the A4 Quattro, A5 Quattro, A6, A6 Quattro, A7 Quattro, Q5, Q7, S4, S5, and SQ5. This heated sensor plays a critical role in maintaining optimal engine performance and emissions control.

• Heated sensor type for faster warm-up and accurate readings
• Specific fit for multiple Audi models ensuring precise compatibility
• 22.52-inch wiring harness length for proper installation routing
• Five-wire configuration with a male connector for secure electrical connection
• Thread diameter of 0.711 inches for correct mounting
• Regular grade type suitable for standard operating conditions

Detailed Product Description

The Denso 234-5164 air/fuel ratio sensor is engineered to provide accurate measurement of oxygen levels in the exhaust gases, enabling the engine control unit to adjust fuel delivery for efficient combustion. Featuring a heated sensor element, it reaches operating temperature quickly, improving sensor response time and reducing emissions during cold starts. The 22.52-inch wiring harness length allows for proper routing within the engine bay, while the five-wire design and male connector ensure reliable electrical connectivity. This sensor is designed with a 0.711-inch thread diameter, matching OEM specifications for secure installation in compatible Audi vehicles.

This sensor is part of Denso's OE Style product line, which focuses on delivering parts that meet original equipment specifications for fit, form, and function. The OE Style line is intended to provide a direct replacement solution for emission control sensors, maintaining the performance and reliability expected from factory-installed components.

Applications and Common Issues Addressed

• Helps resolve poor fuel economy caused by incorrect air/fuel mixture readings
• Addresses rough idling or engine hesitation due to faulty sensor signals
• Reduces increased emissions and failed emissions tests linked to sensor malfunction
• Prevents check engine light triggers related to oxygen sensor faults
• Supports stable engine performance in Audi A4 Quattro, A5 Quattro, A6, and other compatible models

Installation Notes and Tips

• Ensure the vehicle is compatible with part number 234-5164 before installation
• Disconnect the battery prior to sensor replacement to avoid electrical issues
• Use appropriate tools to avoid damaging the 0.711-inch threaded sensor housing
• Verify the wiring harness length and connector type match the vehicle’s existing setup
• Follow manufacturer torque specifications when tightening the sensor

Quality Assurance and Warranty

Denso OE Style sensors are manufactured to meet strict quality standards, ensuring reliable performance and durability. This air/fuel ratio sensor undergoes rigorous testing to comply with OEM specifications. While specific warranty details may vary, Denso typically offers coverage against defects in materials and workmanship to support long-term use in compatible Audi vehicles.