Yes, everything Klaus said. Most 850's I work on go to the graveyard with their original struts and shocks. Not that they couldn't stand replacement, but it seems they never wear out to the point of absolutely needing replacement. With 115K, they might only be half used up. It is common at my shop to just replace the bushing. OE part number ends in "713" - that's how common a job it is. Wouldn't recommend replacing them yourself because of having to compress the spring. Haven't had to fuss too much with alignment afterwards, but there is always adjustment to be had even on a "perfectly" set up vehicle. Some shops will try to sell you "while we're at it" replacement of struts and strut bearings, but this is one instance where just the bushing can and should be replaced. We get about $150 per side as a reference.