Flashing is inherently risky. Follow these industry standards: Welcome to VAG-Flashinfo!

This must match the hardware in your car. It identifies the specific ECU family and revision.

A small jump (e.g., 9970 to 9979) is usually a safe bug fix.

Manages ignition timing, fueling, and boost.

VAG uses proprietary formats that dictate how a diagnostic tool communicates with the module: