When you start DiagBox, it reads the VIN, or you can enter it manually, then when you start Lexia the first thing it asks you for is the RPO..
The RPO is a number that is written on the Driver's door when you open it, below the tyre air pressure. It denotes the manufacturing date.
If you enter wrong number you get wrong information but if you enter out of range number then you get NO DATA..
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