1 ). The first three numbers "754" are found in the model number of the stereo.
2). First find the paper label on the right hand side of the radio.
3). All Blaupunkt radio's have a part number starting with a number like 7 643
4). Followed by further numbers like 754 010 (7643 754 010).
5). The radio also has a serial number printed on a label and engraved into the chassis of the radio.
The serial number may look like this: BP7754Y1682854
You will notice that the three numbers from the model are also found
just in front of the letter ( Y ) in the middle of the serial number
Please Note: This letter may be different on each radio.
6). Now having all 10 digits (7541682854), Enter them into the calculator Once you are happy with the code entered, Press the 'Calculate Code' button. The calculator will respond by displaying the Factory Programmed Unlock Code for this unit.
For Vauxhall/OPEL Model SC202 ( C ); Model number 7 641 850 620 With a serial
number of GM1202N4825428 engraved into the Chassis of the radio on the right hand
Enter the numbers 8504825428 into the calculator to find this radio's security code.
NOTE: On models manufactured before 1991, then take the last three
Numbers of the model, 7 641 850 620 such as (620)
Two codes are displayed l.e 0548 and 6548
the first code (0548) is for use with older units which only accept a "1 " or a "0" as the
first digit the second code (6548) is for use with more recent units.