FWIW, I have this impression that Hyundai is still weak on electrical systems. We had issues with a couple of Getz from a decade ago where the battery got discharged (which later on proved to be an alternator fault), but the system failed to light up the not-charging caution light. Both happened outside of warranty and we had to shell out around 18k for a new alternator and associated services, each. It didn't happen at the same time, though, but it was too close to be a coincidence. Sold both cars within about year or so later.