Commonly found in modern C7/C8 models, often using the 0B5 (DL501) or 0CK transmission.

A dealer or comprehensive VIN decoder can identify the exact gearbox originally installed. Common A6 Transmission Issues & Fault Codes

Common in later A6 models and quattro variants, often identified as ZF8HP . Manual: Examples include 01E or 01X 6-speed units. How to Find Your Gearbox Code

The sticker contains the 3-letter engine code and 3-letter gearbox code.