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  1. Do ESN ever recycle?

    General Discussion
    I was taking a close look at the dataplate on my Cummins 4BT and finally setup a Cummins QuickServe account to look up the ESN. The ESN on my engine reads 455599906 which is 9 digits and not 8. If I enter the first 8 digits, it shows a completely different engine, the C8.3 liter. The date on...