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Most likely your Saab is like 99.9% of other 2003 cars - it is computer controlled. Your idle RPM is determined by the computer. It may not be adjustable. If it's idling too high or low, it's likely a defective sensor. You don't necessarily need to take it to a Saab dealer to get it fixed. Nowadays, most independent garages have a tool to read your computer system.

Not a Jennyus.
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