Most have the Garrett/Air Research Turbo but some have KKK Turbochargers.
So it would be a good idea to make a Good ID First.

At least for the Garrett in SF, CA, USA there should be Turbo Shops where You can get an exchange or the might even be able to rebuild the one you have in a Day; but You need to ask.

Another option is to buy what is called a Cartridge Assembly. That is the Bearing Housing and the Turbine and Compressor Wheels all assembled and rebuilt.

But, to exchange that you need to remove the Exhaust and Compressor Housing.
Sometimes the Bolts on the Exhaust Housing can be frozen in to the extent that sometimes they break off when you try to remove the. So that is something to think about.

If you buy a complete rebuilt Tubo You get a warranty.

If you get the Cartridge Assembly You also get a Warranty but they might try to claim you assembled the Turbo Wrong.

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84 300D, 82 Volvo 244Gl Diesel