INPAX

BMW's diagnostic tool, running in your browser.

Pick an INPA script and run it against your ECU — live data, ECU configuration, and the built-in diagnostic procedures BMW shipped in the original .ipo bytecode. Same scripts the dealer tool runs, in a browser tab instead of a Windows VM.

How to use it

In your browser — inpax.bimmerz.app. Point it at your INPA install, browse the script catalogue, pick one, plug in your cable. Files stay on your machine.

From a terminal — install the CLI globally and drive scripts from the shell or an interactive TUI:

npm install -g @emdzej/inpax-cli
inpax info script.ipo
inpax disasm script.ipo
inpax run script.ipo                       # interactive TUI
inpax run script.ipo --headless            # batch mode

Two more globally-installable tools ship alongside the CLI:

npm install -g @emdzej/inpax-compiler      # IPS → IPO compiler
npm install -g @emdzej/inpax-ipo-editor    # TUI editor for IPO constants

Chromium-based browsers on desktop (Chrome, Edge, Opera, Brave) for the web app. Node 20+ for the CLI tools.

Community patches

Compiled .IPO files are bytecode — once published, BMW never updates the strings, thresholds, or jump tables a script ships with. inpax's patch command (and the in-browser editor) let you apply non-invasive constant-level tweaks without touching the original file: translations for the German prompts, label corrections, threshold overrides, and so on.

The shared catalogue lives at ipo-community-patches — patch files indexed by script and chassis, free to download and apply. Contributions welcome — submit a PR with your patch and a short description of what it changes.

Links

• GitHub
• User guide — pick a script, drive the cable.
• Developer guide — embed the VM, write providers.