Review on 2021-2016 Hyundai Elantra Ir/If Compatible Alternator: 90 Amp, 12 Volt, 37300-2E200 by Michael Syph

Does not keep up with car demand when air conditioning or headlights are on, headlights are dimmed and revs are low increases so much that the car starts to shake, until after a few seconds the car revs up again. It seemed like he couldn't handle any more loads until after a few seconds. I had a brand new battery so I know it's not so ordered a factory alternator and now the car has no issues with load demands, runs perfectly even with everything on in the car at the same time. Maybe I just got a bad one, but I'd stick with what was originally in the car.