Other than the scratches and dings that I have put on the poor little car, nothing has gone too terribly wrong.
The only thing that ever just broke out of the blue was the fuel pump (which is only moderately expensive if you befriend or are a competent car-tinkerer).
Every other problem was related to normal wear (tires, clutch, wiper blades... blah blah etc)
I must say that the leaky sunroof is a bit of a hassle when it actually rains around here, but since that's rare, I don't worry much. The car is a gem to drive and to work on. No matter how much I push the little thing down the freeway, it just keeps on ticking along. Parts are cheap and accessible.
The Metro is an under-appreciated, though thoroughly lovable vehicle (drive one around for a bit, you'll see).
I had owned a 92 Geo Metro I just traded it in for a new vehicle and I must say I miss that car so much! It is the best car I think anyone has ever made. In the 14 years I owned it I never had a problem with it. The car was perfect all the way around. So if you own a Geo Metro don't look down on it they are great cars that are so under-rated.
They are great cars and you wouldn't think they would be with the tiny three cylinder engine they have-