Always let it run a minute before you start your trip, especially when cold out.
Never rev the engine until a couple of minutes after water temp stopped increasing. (So the oil is up to working temp.)
Always let the engine run 30 seconds after you pulled in to park.
If you ran fast or towed something, let it run a minute or two.
Change oil twice a year or every 6000 miles, which ever comes first.
Always use 5W-40 or 0W-30 fully synthetic high quality oil.
If you do this, the turbo will live many years.
If you start to see white or blue smoke on start, the turbo is shot.
You still have time, but not much, to change turbo. It can be as little as a few cold starts left until it burns out. If it completely burns out, the engine will suck in oil, run dry, heat up the catalytic converter etc etc.
But if you replace the turbo when the first smoke appears, you are golden.
You have two options for turbo. New Old Stock is mostly gone. So either order a chinese Garret copy, or order a used one.
Both a used original and a chinese Garret copy cost about the same, $200-300. Both have about the same chance of working for a long time. Some of the old ones have a lot of miles left in them, and the quality of the copies seem to have a high spread.
If you or your mechanic can adapt inlets and outlets, you can put a turbo from another brand of car on your SAAB engine.
The -2003 ("original") 9-3 SAAB, are in my opinion undervalued. They look good, and they drive good.
It's not extremely fast, but I have never felt as "one" with a car as with that model, and it's also extremely forgiving. If you push it to its limits in corners, it will let you know long in advance what it's about to do. It felt completely undramatic to push it to its limits, never felt scary. I have driven both slower and faster cars which have both felt scary when approaching their limits.
For some reason, I also pretty much immediately felt "where the car is" when parking the SAAB. I have driven many cars since then, various models of Mercedes, Volvo, Citroën, VW, and also the next generation SAAB 9-3, but in all of them it's taken me a lot longer to figure exactly "where the car is" when parallel parking and such.
What is night mode and why did I use it all the time?
What is this CD? a tour of my own car... hosted by a jet fighter pilot and random disembodied female voice?
Where do I put the key? Oh, next to the gear box... like mid thigh. (the cd will tell you this is to avoid injuring your knee in an accident)
Wait, how do I remove the key? Shift to reverse? Well it won't go in reverse... oh pull up on gearbox skirt and THEN shift into reverse.
The windows rolled up and down unnecessarily fast. Faster than you're thinking.
I had little wipers on the headlights (so european!)
Its turbo suddenly died, taking the engine with it... but I would LOVE to own that car again.