Denso 234-4846 Oxygen Sensor - Downstream

Denso 234-4846 Oxygen Sensor for Audi A8 Quattro

The Denso 234-4846 is an OE-style heated oxygen sensor built for precise replacement and consistent signal performance. It is a specific-fit sensor for the downstream position on 2005-2009 Audi A8 Quattro models, including cylinder 7, 8, and 9 applications.

Designed for the 2005-2009 Audi A8 Quattro downstream location, this sensor supports accurate exhaust monitoring and dependable engine management. The Denso OE Style line focuses on exact fitment and OE-level construction for a direct replacement experience.

Key Features

• OE Style replacement oxygen sensor for exact-fit service
• Heated sensor design for faster operating response
• Specific fit for downstream installation
• 4-wire configuration with male connector
• Threaded mounting type with 0.708 in. thread diameter
• 67.13 in. wiring harness length for vehicle-specific routing
• Built with Denso’s aluminum oxide trap layer to help protect the ceramic element from silicone and lead contamination

Detailed Description

Denso 234-4846 is engineered to match OE standards for fit, form, and function. As part of Denso’s OE Style product line, it is precision built for direct replacement on the Audi A8 Quattro downstream sensor location, helping maintain proper exhaust feedback for the engine control system. This part cross-references Bosch 16982 and NTK 25661 for the same application.

For shoppers searching for a downstream oxygen sensor for 2005-2009 Audi A8 Quattro, or an OE-style replacement oxygen sensor for Audi A8 Quattro cylinder 7, 8, and 9, this Denso 234-4846 offers the correct fitment profile and connector layout.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio feedback from a worn downstream sensor
• Reduced fuel economy caused by inaccurate exhaust readings
• Slow sensor response from heat-related wear
• Contamination-related sensor degradation from silicone or lead exposure

Installation Notes and Tips

Install this sensor in the downstream position only on confirmed 2005-2009 Audi A8 Quattro applications. Verify connector style, thread diameter, and harness routing before installation. Because this is a specific-fit, threaded heated oxygen sensor, matching the original mounting location and wire configuration is important for proper operation.

Quality Assurance

Denso manufactures and tests this oxygen sensor to OE standards for consistent replacement quality. The OE Style line is built for first-time fitment and dependable service life, with contamination protection built into the sensor design.