Lee and others........... Let's say you wanted to check some special serial numbers such as the twin turbo, but you didn't know the entire VIN. All you knew is that it was 000502. In order to get the info back from CarFax you would have to enter the ENTIRE VIN number, including the "check" digit (9th number). So you would have to guess between 0-9 or X until you got the right one. The correct VIN for the Twin Turbo is SCEDT26T1BD000502. (Check digit is 2). Now let's say you wanted to know the history of my car 000697. In my case the check digit is 9. Full VIN: SCEDT26T9BD000697. I really don't know the purpose of check digits, I assume they're just there to cut down on mis-entered numbers. Our three digit account number at our country club used to have a extra number at the end for just that purpose. I guess if the billing people entered it wrong, the computer would reject the number. In the car club that I run, we use the calculator a lot for research on the Cadillac Allanté. We try to track down final production numbers for the years and two versions (hardtop/convertible or convertible). We can guess the serial numbers, then use the calculator for the check digit. Otherwise we would have to guess a maximum of 11 times for a single VIN. In Nick's case, he had 16 digit VIN with a 9 in 8th position. In my VIN, any all others I've seen, have a T in the 8th position. By inserting the T right before, it didn't change the 9 which meant it was mathematically correct. It was a guess that by chance they left out the T on his. Just a guess--not saying anything is wrong with his VIN. I saw the exact formula listed once and it was REALLY complex. I emailed the file to a fellow DML'er and hopefully he'll post it on a FTP site for everyone. Anyone know how the DeLorean VIN breaks down?? For GM vehicles it's in the pattern as follows (93 Cadillac Allante is the example) 1G6VS3399PU128044 1=USA G=General Motors 6=Cadillac VS=Allante Convertible 3=Body style 62V, 2-door coupe convertible 3=Manual seat belts w/ air bag 9=4.6 liter V8 DOHC (Northstar) 9=check digit P=Year of manufacture - 1993 U=Final assembly - Hamtramck, MI 128044=serial number which started at 125001 (started at 100001 for those cars shipped with a hardtop) Now this could be the same format for the DeLorean??? (My 81) S=Ireland or UK? C=DMC? E=DeLorean? D=?? T=?? 2=2 door, two seat coupe? 6=manual belts? T=2.8 liter V6 engine? 9=check digit B=Year of manufacture-1981 (B is correct for 1981) D=North Belfast? 100697=serial number. Can anyone confirm any of these numbers and letters by comparing them with other British VINs? Thanks, --Jonathan #000697 ------------------------ Excuse this question, maybe I missed something some where..... If I read the vin number on the door post of my DeLorean and do some sort of calculation the answer will confirm that the vin number stamped into the metal ID plate is correct? I don't get it? whats the point in that? The vin number is what it is, I can see a number being miss stamped at the plant, but once it is stamped into the metal what ever it may be, thats what gets recorded on all the paper work...That number is by it's very existence correct