I see you have 1993 and 1994 900 series in your account post history. So, this thread on 1997-1998 S90 does not relate to you. If you have IRS with Nivomat, your 93-94 900, I guess, uses coil springs at the rear. And Nivomat rear dampers remain available. You can also upgrade the springs and use 'regular' dampers.


If purchased through Volvo, or Volvo brand through a retail parts outlet, some products are made in Europa and some not.

In the North American after market, when you look at the iPd or FCP Euro sites, more so iPd, you will see Sachs by Boge or Boge by Sachs. Sachs set-up a factory in Mexico sometime before Boge purchased Sachs. ZF, in turn, purchased Boge.

https://www.ipdusa.com/products/7450/100202-rear-shock-700-900

So, dampers are usually marked as made in Mexico.

FCP Euro appears not to sell self-leveling Nivomats. Recent posts may indicate self-leveling options made by other manufacturer. Though I am uncertain as the 700-900-90 IRS changed from introduction in the late 1980s to 1998.

https://www.fcpeuro.com/products/volvo-shock-absorber-740-760-780-940-170-153

You may want to begin a new post on the topic to find solutions.

iPd offers what appear bolt-in upgrade options to stiffer rear springs and non-self-leveling dampers for IRS and non-IRS live-axle rear suspensions at maybe a premium price point for 700-900 that came from the factory with self-leveling Nivomats and coil springs.

You will find disappointment in trolling posts on the Made in Mexico Sachs or what are sometimes called Boge. Yet you have Bilstein (B6) HD, Bilstein (B4) Touring, and Koni.

Also consider rear suspension bushing inspection and replacement whether live axle or the more critical IRS.

Hope that halps.
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