Water pump.
Head gasket (5).
Power sunroof.
Power door locks.
Power windows.
Heater Core.
Radio (2).
Car averged going to the dealer every 2.5 months.
Several different electrical sensors.
I do NOT advise anyone to buy a Neon or any Dodge product. I did not get any help from the dealer or from the manufacturer with the problems I had. It would take an average of three trips to the dealer to get just one problem corrected. I traded the car after 2 years of spending my off days at the Dodge dealer. I traded it for a 2000 Ford ZX2 that has not been back to the dealer since I drove it away.
Transmission - it's worth two pennies, that's what the whole car should be worth.
You will see the dealer more after about 2 years with the ford. trust me. and it will cost you out the zing zang to fix!