300ZX V6-2960cc DOHC (VG30DE) (1990)
Beginning with:
Non-Turbo
DOT U28J4M9 310
Turbo
DOT U28JXM9 030
The last three numbers of the DOT Number indicate the number of the week and the production year as shown in the example below:
EXAMPLE:
The replacement tires were produced beginning the 31st week in 1990, for Non-Turbo Tires.
The replacement tires were produced beginning the 3rd week in 1990, for Turbo Tires.