Plastic mud flaps literally fell off of the car in a 70 zone, second day of ownership, after I talked about how awesome my car was for about a half hour straight. Embarrassing.
On the highway, after driving through a puddle on a dirt road that 20 other cars went through, my car accelerated 0-60 in about 5 minutes (1992 Honda Civic Hatchback survived this? Come on, that thing is half as high up off the ground as my car).
Check airbag light randomly came on.
Check engine light came on.
My heated seat stopped working.
Car battery died (automatic headlights stay on about 5 minutes after the car is shut off).
Car battery died 5 other times before I got rid of it.
Be really careful with this car, the guy I bought it from polished it right up so I couldn't notice all of the secret problems that it had. I understand that the rule is buyer beware, but this car looked perfectly fine, even to a mechanic.
This car had really awkward handling; it didn't feel like a car. Shoulder checking to your left (steering wheel on the left hand side) is an absolute pain, so I bought a globe mirror for my side view mirror. The heated seats worked amazingly (my passenger in the front seat loved it), and mine came with a stock Pioneer stereo, which blasted really loud music; loved it.
Driving it when it is in perfect working order, amazing, and then it just all fell apart. The mudflap legit fell off of the car, which is attached to like the whole body of the car, very poorly designed.
The back end of the car jumped up and down like a hyper kid every time I hit even the smallest bump in the road.
The front right side of it felt like plastic was like slowly breaking every time I hit a bump.
Check engine light and check airbag light came on a day apart.
Not even a week later, my heated seat stopped working, and then my car battery died the following week. If you look at everything that went wrong with this car above, you will know that that within a 2 week period, it will kill your wallet (2000 dollars worth of repairs to be exact, fixing car computers costs a lot), so I did exactly what the person who sold it to me did. Polished her up, made her look pretty and threw her up for sale.
Now, this car wasn't HORRIBLE, when it worked, but on the highway it was as silent as a bullet and passed cars like it was nobody's business. The stereo control on the steering wheel made me extremely comfy in the car on the highway, and the cruise control worked perfectly fine. Loved it, then last couple weeks of ownership, got really angry every time I just about got in a car accident, but didn't write it off.
Now, my friend owned a 2008 Cobalt base model, and that thing is awesome, solid, and a good car. I trusted it very much, so if you are still considering a Cobalt, buy a newer model. The 2005 was the test, and the 2008 is the improvement. I'll say it again, stay away from the 2005 model.
After owning this and a 1995 Chevrolet Beretta, I don't think I'll ever be able to let myself buy another Chevrolet. They have an eternal taint on me, and I felt way more safe in my 1985 BMW 535i that got written off for rust issues. I don't think that I'll ever be able to go back to an American made car ever again, unless of course it's old school.
I said it once, I'll say it again, buyer beware.