Well, the freezing throttle problem was a campaign so to my knowledge, all campaigns and recalls don't ever expire thus always free to the owners of those cars. We're still commonly seeing '98 X70s with open campaigns and those cars are out of warranty yet the campaigns are still free to whoever owns the cars.

As for moisture, STILL never heard of that either and not only have I been a Volvo dealer tech for 20+ years in an area that also gets to -25F, I own an older Volvo turbo too and I've never had any intercooler freezing at -25, even at high speeds, full boost (15 psi), and long freeway trips at those temps.

I've never had one customer complain of that either and no, I'm not talking about an old, weak intercooler hose calapsing on accell as also discussed here sometimes (seen that).

Early '94 850s did have a known problem with the throttle freezing opened when extremely cold and that's why they had a huge and costly campaign back then. We did them to many cars but it's always possible that someone missed the literature sent by Volvo to the owners back then.