Since this appears to be navigation or firmware data (CS11/TOM), ensure your device is compatible before attempting an installation.
If you only downloaded .003 , you need to go back and download all preceding and succeeding numbered parts. Datei herunterladen CS11TOMDE.7z.003
Where did you this from? (e.g., a car manufacturer site, a GPS forum?) Since this appears to be navigation or firmware
The software will automatically pull data from .003 to reconstruct the full file. ⚠️ Important Considerations a car manufacturer site