Welcome to the forum mate,

Pro is for cars equiped with I-drive, High is for non i-drive.

You say 2003 w/dvd, I'll assume you mean an 2003 x5?? with dvd, then you need a high dvd.

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Sept 03, M3, Silver Grey. Retro-fits: Modded Mk4 DVD Drive, OEM Bluetooth, VR Control, Rainbow Speaker Upgrade, Sony SOT Amp, HK Sub, CCFL, Intravee II, NightMode.