Under the EU Data Act, Volkswagen, Audi, Škoda, SEAT/Cupra and Bentley must hand you the data your car collects. The portal gives you a raw JSON with hundreds of thousands of records. This tool turns it into a readable dashboard — including a plain-language battery health verdict with a measured usable capacity, trip and charging ledgers, and an audit of what the package is missing.
On the Volkswagen Group's EU Data Act portal, pick your brand, sign in and request the historical data package. It arrives as a download link within days — the link expires after ~7 days. Full walkthrough →
Upload the ZIP as delivered, or the VIN-named JSON inside it. A real package is tens of MB; if yours is a few KB the portal delivered an incomplete export — simply request it again.
Battery health with measured capacity, trips, charging sessions, thermal system, backend activity and a completeness audit. Download the result as a single offline HTML file to keep or share.
Records are streamed and reduced in a background thread on this device — the file itself is never transmitted anywhere.
Every value is labelled observed (directly in the export), derived (calculated from observed samples) or inferred (undocumented channel whose meaning was reverse-engineered and cross-checked). Solid line segments are measured; dashed segments bridge periods where the car wasn't reporting.
Current vehicle snapshot — SoC, range, doors, service due — and headline figures: distance, consumption, energy charged, idle drain, top speed.
Distance per day reconciled to the odometer, driving heatmap, speed distribution, a charging ledger with estimated kWh and power curves, and a trip ledger.
Plain-language health verdict with the evidence behind it: measured usable capacity, cell imbalance over time, by SoC band and by load state, HV current.
Ambient temperature, operating modes, seven thermal sensors as small multiples, coolant flow.
Remote actions, vehicle reports, backend errors, and a decoded configuration snapshot.
What VW's own Data Dictionary says exists versus what your export actually contains — the concrete field names and numbers to cite if you complain.