I have a 2003 Saturn Ion I was driving home from work and it just quit running. I pulled off the road and when I turn the key I have power to the radio, dashboard, lights. but the when i turn the key i have nothing to the engine no clicking and etc....

SOURCE: 2006 saturn ion

you should check the main fuse its the large one you probably blew it and hopefully not the ecu.

SOURCE: Oxygen sensor location on a 2003 Saturn Ion-1

One is front of the cat, and one after the cat of the exhaust.
The OBD Scanner should tell you which bank is producing the error.
Bank one is the front one.

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SOURCE: turn key, lights work but car won't start it says "service engine

battery is weak.

SOURCE: 2003 Saturn L200. Car will turn over but will not

I have the same model. Congrats you made it over a 100,000 miles! Most of them failed after as little as 20,000 or around 78,000 miles becaue there was a design flaw in that the timing chain did not get any oil to it. I had the 78,000 mile engine. Mine failed while driving at 65 miles an hour on the expressway. Pretty much wrecked the engine. The problem with putting in a used engine is that no other type of engine will fit in this car and you can count on engine failure again at 20,000; 78,000 or from what you tell me after 100,000 miles. You would be better off investing in a down payment for a Toyota made here in America that gets over 50 miles to the gallon. I used to be an oldsmobile man and then reluctantly switched to Saturn but am fed up with GM completely now and all american car manufactures.

SOURCE: How to unlock radio in 2005 saturn ion

It may be complicated, depending which radio you have. UC1 or US9, US8. The owners manual should have all the info you need. You do have the radio code, right? If not...you will need to visit the dealer. If you have the code, the radio must be on for 1 hour and then it will unlock when it reads - - - - , and you can put the code in. Its not your girlfriends fault. ; )