VIN Decoder

Reply Subscribe

Thread Tools

Search this Thread

Mar 15, 2021 | 03:39 PM

davelv

Thread Starter

Pro

Joined: Oct 2013

Posts: 641

Likes: 353

VIN Decoder

MM posts partial VINs on its daily update.

The full VIN can be determined by finding a similar body, trim and year and replace your MM VIN to the end. That still leaves one check digit that is random.

Use this site to determine the check digit and thus full VIN:

corvette-web-central.com/Check-digit-VIN-decoder.html

Last edited by davelv; Mar 15, 2021 at 03:43 PM.

Mar 15, 2021 | 04:12 PM

Zymurgy

Moderator

Joined: Feb 2006

Posts: 38,952

Likes: 17,826

From: DFW Area TX

2021 VIN Decoder

The check digit can be 0-9 or 'X'.

An overview of the process for calculating a VIN's check digit is as follows:

Remove all of the letters from the VIN by transliterating them with their numeric counterparts. Numerical counterparts can be found in the table below.
Multiply this new number, the yield of the transliteration, with the assigned weight. Weights can be found in the table below.
Sum the resulting products.
Modulus the sum of the products by 11, to find the divisor.
If the divisor is 10 replace it with X.

Transliterating the numbers

Transliteration consists of removing all of letters and substituting them with their appropriate numerical counterparts. These numerical alternatives can be found in the following chart. I, O and Q are not allowed, and can not exist in a valid VIN; for the purpose of this chart, they have been filled in with N/A (not applicable). Numerical digits use their own values.

Transliteration key: values for VIN Decoding
A: 1 B: 2 C: 3 D: 4 E: 5 F: 6 G: 7 H: 8 N/A J: 1 K: 2 L: 3 M: 4 N: 5 N/A P: 7 N/A R: 9
S: 2 T: 3 U: 4 V: 5 W: 6 X: 7 Y: 8 Z: 9
S is 2, and not 1. There is no left-alignment linearity.

Weights used in calculation

The following is the weight factor for each position in the VIN. The 9th position is that of the check digit. It has been substituted with a 0, which will cancel it out in the multiplication step.

Position 1 2 3 4 5 6 7 8. 9 10 11 12 13 14 15 16 17
Weight . 8 7 6 5 4 3 2 10 0. 9. 8. 7. 6. 5. 4. 3. 2

(ignore the "." above - they are to get the spacing correct)

Mar 15, 2021 | 04:51 PM

BobG

Race Director

Joined: Dec 2000

Posts: 16,453

Likes: 3,573

From: here

Or you could do it the easy way:

Quote:

Once you get your partial vin from your dealer, it's a pretty simple process:
For MY2021's:
1st is Country of Origin: 1 = USA
2nd is Manufacturer: G = GM
3rd is Make of car: 1 = Chevrolet
4th is Car Line or Series: Y = Y-body series (Corvette)
5th is A = 1LT, B = 2LT, C=3LT
6th is 2 = coupe, 3 = convertible (HTC)
7th is always D (restraint system)
8th is engine type 4 = LT2
9th is the Check Digit.
10th is model year M = 2021
11th is 5 = Bowling Green
12th is 1 = customer, 0 = CTF
The rest is partial vin. (sequential)

To generate the 9th character check digit, the NHSTA website has provided a tool: https://vpic.nhtsa.dot.gov/decoder/C...3e1eaxhf000316

For example, if you have ordered a 2LT HTC, you're at 3400, and your dealer told you your partial VIN is 9999, you'd build your VIN to enter into the NHTSA tool like this (I used X, randomly, the tool will tell you the correct one):
1G1YB3D4XM5109999
Cut and paste that into the too, click the "check digit" box, and at the bottom it'll say "X" is incorrect, and you should use a 3 instead. So in this fictional case, the correct full VIN should be: 1G1YB3D43M5109999

There is a lot of information on VIN calculators out there on google if you want to learn even more..