Jeep Grand Cherokee Operating Information Manual page 306

DOT = Department of Transportation
– This symbol certifies that the tire is in compliance with the U.S. Department of Transportation tire safety standards and is approved
for highway use
MA = Code representing the tire manufacturing location (two digits)
L9 = Code representing the tire size (two digits)
ABCD = Code used by the tire manufacturer (one to four digits)
03 = Number representing the week in which the tire was manufactured (two digits)
– 03 means the 3rd week
01 = Number representing the year in which the tire was manufactured (two digits)
– 01 means the year 2001
– Prior to July 2000, tire manufacturers were only required to have one number to represent the year in which the tire was manufac-
tured. Example: 031 could represent the 3rd week of 1981 or 1991
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EXAMPLE:
DOT MA L9 ABCD 0301