Load in codes dating date
.........since tires is just about the only thing I know about..........
Please drop me a note if you have a topic you want to see: [email protected] Tire Update April 2015: NHTSA (National Highway and Traffic Safety Administration), the branch of the US government that regulates tires (and in this case, what is required to appear on the sidewall), has annouced that they have run out of 2 digit plant codes (see below) and are making a change to a 3 digit plant code.
The coding is optional, but since many tire manufacturers use the code to track returns, I don't know of anyone who doesn't use this coding.
So from April, 2015 to April, 2025, you will see both 2 digit and 3 digit plant codes - and the existing plant codes COULD use a "1" (One) in front. If you look to the right, the plant code for the DOT number would be 5M.
Here's a web site that has an old version of the plant codes: From time to time, this gets updated, but don't depend on this being 100% right.
Prior to April of 2015, all plant codes were 2 digits, but after April of 2015, a third digit was permissible, and 3 digits are required by April of 2025.
This means there will be a period of time where there will be both 2 digit and 3 digit plant codes.
So if you look "5M" on the web site linked above you should get Bridgestone in Sao Paulo, Brazil.