I have known it happen in other late model cars. The last one was in friend's Astra, alt went after about 3yrs, very low mileage. I think manufacturers have just loaded more and more electronic gear on cars without developing alternators adequate enough for the long term, and Jeep is a clear culprit.
Alternators in older cars had a fighting chance with much less pull on them. Remember wind down windows, absence of AC, carbies, mechanical ignition, no ECU etc? (not that I miss most of those!). I'd never thought about an alternator failing until the last 10years or so.
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MY13 GC Laredo CRD - gone but not forgotten
MY23 Skoda Octavia MKIV wagon - fully loaded
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