They do have a history of cheaping on parts. When we had a KIA, all sorts of problems with CV joints, and power steering components, all expiring around 130,000km or so. Just lower quality seals & parts on drivetrain components, that lasted just until out of drivetrain warranty, if I recall.
Their EVs seem well built, from watching Sandy Munro videos, anyways. (e.g. https://www.youtube.com/watch?v=igFytqIMp0A)
But they're also so-far all in the upper tier of price ranges. Nobody is really making a 'budget' EV yet, apart from maybe GM with the Bolt.