I cannot find the 4-digit date of manufacture code on the side of my Cooper CS4 Touring tire. I know they were introduced only a year ago, BUT should they still be required to imprint the manufacture date code on the tire? Thanks!
You're right, it's required by law that this date is on each tire. Just to make sure you're looking for the right number, let's double-check.
Somewhere on the sidewall you'll see the letters DOT followed by a series of 10-12 numbers and letters. The manufacture date involves the last 4 of these numbers. They tell you the week and the year the tire was made. So if the last 4 numbers are 5107, that means the tires were made in the 51st week of 2007.
While all this is required on one side of the tire, just the letters DOT and the first 4 letters/numbers of the series are required on the opposite side. So if you're looking at your Coopers and all you see is "DOT XXXX," then the more lengthy code - the one that tells the manufacturing date - is probably on the other side of your tire.
〉 Answered on Aug 18th, 2008 by Denise Koeth, Managing Editor at Tire Review Magazine