I got one question, I found a guy that has a passat and is selling his, the number on the chip is all the same expect for the last 1 letter. Does that make any difference at all? could whoever installs it change it over so it fits my passat?

His is: 2002 Passat® 1.8T 4B0906018CM
Mine(would be the one for my car): 2001 B5 Passat® 1.8T 4B0906018CL