Denso 234-4485 Oxygen Sensor - Downstream, Downstream Left or Downstream Right

Denso OE Style Oxygen Sensor 234-4485

Denso 234-4485 is an OE-style heated oxygen sensor built for specific-fit replacement on select Audi, Porsche, and Volkswagen applications. It is engineered for direct replacement performance, accurate exhaust feedback, and a first-time fit on downstream locations.

Key Features

• Heated oxygen sensor with a specific-fit design
• 4-wire configuration with male connector
• Threaded mounting type with 0.708 in. thread diameter
• 28.94 in. wiring harness length for application-specific routing
• OE-style construction for direct replacement on downstream positions
• Denso aluminum oxide trap layer helps protect the ceramic element from silicone and lead contamination

Product Details

Denso OE Style sensors are manufactured and tested to OE standards for precise signal control and dependable fitment. This part number, 234-4485, is built as a direct replacement oxygen sensor for downstream locations on vehicles such as the Porsche Cayenne, Volkswagen CC, and Audi RS5. The heated design supports faster sensor operation after startup, while the specific-fit layout helps match factory connector and mounting requirements. This part cross-references Bosch 16002 and Delphi ES20365 for the same application.

What It Helps Address

• Check engine light concerns related to oxygen sensor performance
• Incorrect air-fuel feedback from a worn downstream sensor
• Reduced fuel economy caused by inaccurate exhaust readings
• Slow sensor response after warm-up
• Fitment issues from a non-specific replacement sensor

Installation Notes

Verify the vehicle’s downstream sensor position before ordering, since fitment varies by model and bank location. This sensor uses a threaded mount and a 4-wire male connector, so matching the factory connector style and harness routing is important. Confirm the application against the vehicle’s year, make, model, and position listing for Audi A6 Quattro, Audi Q7, Porsche Cayenne, Volkswagen Passat, and related fitments before installation.

Quality Assurance

Denso manufactures and tests this OE Style oxygen sensor to strict original-equipment standards for consistent replacement quality and accurate fit. The protective aluminum oxide trap layer is part of the sensor design to help shield the sensing element from contamination and support long service life.