QUOTE (CptGloval @ Jul 3 2009, 01:45 PM)

Hmmmm, ive been fortunate to never have to change an alternator. However, I used to buy Bosch spark plugs for my old dodge stratus (what I had before the sonata) and was constantly replacing them. Maybe its a dodge thing, but the mechanic at the shop I bought parts from said not to buy Bosch anything because the quality was not good. Well, just what I was told about Bosch, and experienced with plugs. I bet other people will have more feedback than me.
Years ago I replaced the alternator on my old Audi with a Bosch model and it lasted fine. I just had to replace the alt. on my Sonata (it was sort of killed while the car was being worked on at the dealer for a separate issue) and the dealer recommended the OEM reman model over a Delco, and he installed it for a discount at $175 due to the circumstances.
One thing I learned was that Hyundai does have an alternator rebuild kit available that includes bearings and diodes, etc. So you could actually rebuild your old unit or the dealer could. Or, there are plenty of automotive electrical repair shops that could rebuild or swap your existing unit.
I'd go for the best combination of price and warranty. If a Bosch unit is very costly, I myself wouldn't do it.