Bosch Oxygen Sensor (Downstream) 16327 / 4H0906265B for Audi S8/S7/RS7/A8 Quattro/S6 (2013-2017)

The Bosch Oxygen Sensor 16327 (OEM 4H0906265B) is a downstream sensor for Audi models with the 4.0L V8 engine, covering S8, S7, RS7, A8 Quattro, and S6 from 2013-2017. It monitors exhaust oxygen levels post-catalyst to ensure proper emission system operation. A direct OE replacement with Bosch's proven planar sensor technology.

Key Features & Benefits

• OE Direct Replacement: Matches OEM part 4H0906265B exactly for fitment and performance.
• Downstream (Post-Cat) Design: Essential for catalytic converter monitoring and OBD-II compliance.
• Planar Ceramic Element: Heats up quickly for accurate readings within seconds.
• Corrosion-Resistant Housing: Robust stainless steel withstands high-temperature exhaust.
• Bosch Reliability: Developed by the company that pioneered O2 sensor technology.

Vehicle Fitment

Technical Specifications

Installation Notes

Plug-and-play installation; ensure connector is securely locked. Professional installation recommended for proper torque and routing.

About BOSCH

Bosch is a global leader in automotive technology and the original inventor of the lambda sensor, providing OE-quality parts trusted by luxury manufacturers like Audi.

This part also goes by the following cross reference.

Cross Reference Part Number: