Vernon Gates
Dodge Dakota
JOIN HERE
12/31/2007
18:15:24
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 Subject: VIN Check Digit Computation
IP: Logged
Message:
A bit of information I dug up a while back.
Here's how your VIN checkdigit is computed.
This is a mathematically computed "check digit", a sort of checksum.
It can be used to compare the validity of the other characters in the VIN.
Here's how you compute it:
Assign to each numeric in the VIN its actual mathematical value and assign
to each alphabetic the value specified below:
A=1, B=2, C=3, D=4, E=5, F=6, G=7, H=8,
J=1, K=2, L=3, M=4, N=5, P=7, R=9,
S=2, T=3, U=4, V=5, W=6, X=7, Y=8, Z=9.
Multiply the assigned value for each character in the VIN by the weight
factor specified for it below:
1st=8, 2nd=7, 3rd=6, 4th=5, 5th=4,6th=3, 7th=2, 8th=10, 9th=0 (check digit),
10th=9, 11th=8, 12th=7, 13th=6, 14th=5, 15th=4, 16th=3, 17th=2.
Add the resulting products and divide the total by 11. The remainder is
the check digit. If the remainder is 10, the check digit is X.
EXAMPLE:
VIN Characters: 1 G 4 A H 5 9 H 4 5 G 1 1 8 3 4 1
Assigned Values: 1 7 4 1 8 5 9 8 4 5 7 1 1 8 3 4 1
Multiply by: 8 7 6 5 4 3 2 10 0 9 8 7 6 5 4 3 2
Add products: 8+49+24+ 5+32+15+18+ 80+0+45+56+ 7+ 6+40+12+12+ 2=411
Divide by 11: 411/11 = 37 4/11 Check digit:4 (compare to character in 9th position)
The check digit (9th position) will always be a numeric or an X.
See there. And you thought it would be simple and strait forward.
Vern
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