Flash It Right - BM3 + xHP Setup Checklist (PDF Guide)

From stock to flashed - in the right order. A step-by-step setup checklist for bootmod3 (BM3) and xHP, written by a G20 M340i owner who flashed his own car: BM3 Stage 2 on 93 octane plus an xHP transmission tune, done in the driveway.

Inside: what to buy before you flash, the battery rule that keeps a flash from bricking your day, how to back up your stock maps, picking the right map for your fuel and hardware, the xHP relearn drive, how to log your first pulls, the mistakes that cost money, and a one-page garage checklist.

Digital PDF download. Tune at your own risk - tuning can affect your factory warranty. This guide covers process and safety checks; always follow the platforms official documentation.