Turbo bypass valve
    Symptom: Engine stalls on deceleration/when coming to stops
        See troubleshooting section for diagnostic
            Replacement cost estimated at $50 to $125

Headliner & door cloth
    Foam backing deteriorates; fabric comes loose and cannot be re-glued.
        Worse in the heat and humidity of the south. 
            Common on many modern cars - almost certainly will happen within 10 years
                Clean headliner and door trim panels minimally to prolong life.
                    Replacement available for < $150 - see http://www.saabstuff.com/

Exhaust system
    Worse in the cold and salt of the north
        Flex pipe is particularly failure prone
            Bad motor mounts will accelerate flex pipe failure

Wheel bearings and hubs are reportedly not a strong point
    I have not found this to be a trouble spot - possibly on very early models
        (Failure may be caused by aftermarket wheels with improper offset)

To prevent engine overheating (and head gasket failure)-
    Replace the cooling fan thermoswitch with the lower temperature unit
        See the Links and Info page
    Replace the thermostat every couple of years

Water pump -
    I think water pump failures are related to poor or no maintenance
        Check for coolant leaks below water pump
            Replacement cost estimated at $125 to $225

Steering pump/rack -
    Ditto - if fluid is changed regularly, the pump and rack are not failure prone
        Listen for excessive growling sounds when turning wheels at a standstill
            Replacement cost estimated at $150 to $350