is the electronic database used by BMW’s diagnostic and programming software. It contains the firmware files (Flashdaten) for every electronic control unit (ECU) in BMW, Mini, and Rolls-Royce vehicles.
For BMW enthusiasts and DIYers, v.4.27.20 PSdZData Lite is a specific version of the data files required for coding and basic diagnostics using software like v42720 psdzdata lite download work