Went to start engine and no response. All accessories work and no sound when key is turned (no click, flutter, etc...). Car is not in gear. Checked starter fuse and is ok. 325i- 2003. No previous battery or starting issues.

If you mean went out by accessories turn on but ignition will not engage then yes...go to car parts store and pick up a push button start... key must be in accessory mode for the starter to fire the car..ie fuel pump on, engine computer, etc all controlled by accessory mode.

You have triggered the security system. Try turning the key to the ON position without starting. Wait 10 minutes. NO LESS. Turn key back, then try to start. If that doesn't work, you may need to bypass. http://diy-gm-security.com/

sound like problem in the theft security system your ignition key or ignition switch worn out.

It is the battery - you must not have the cables securely placed on the terminals. The same thing happened to me a few months ago.

Sounds like your battery is low-- is it the original battery? if so it may be time for a new one.
Try jump starting it yet?

sounds like a dead battery, and it sounds like the van has a starter kill relay hooked up the the starter solinoid wire under the dash

Try shifting into neutral and pressing on the brake while turning your key. Sometimes when I'm in park my shifter doesn't make the switch that says I'm in park, if I turn the key...nothing....cause my car "thinks" it's in gear.

sounds like a faulty alternator have it checked and serviced.

needs a starter- or cable- if you had to tap on it for it to work its junk-

sell your saturn