Advice for buyers
What should I look for in a used Saab 9-5 saloon?
Given the potential trouble in finding parts, you really need to find a Saab 9-5 that has been properly cared for. Theoretically, the fact that it's based on the Vauxhall Insignia should help, and some engine and gearbox parts are interchangeable. However, you won’t be able to get a Vauxhall dealer to carry out regular servicing, not least because the Saab’s on-board electronics are different.
In fact, it could be a good idea to get involved with the Saab Owners Club if you’re really keen on a 9-5, as they’ll be able to help you track down both a good car and the right people to help you care for it.