To check the suspension, I would have a good alignment shop look at it - my shop does work for local indies, and they are great.

Or have a dealer check it out - mine is not bashful about telling me about things that might need work. Why replace things that are in good shape?

I had a '96 855R (Isabel) and I found that the space between the tires and wheel wells would vary if the car sat for a couple of days - I suspected that the nivomats sank a bit.

However, as soon as I drove a half mile of so, and went over a couple of bumps, the clearance corrected itself. Once I picked up a B16 with transmission - the rear dropped 2 inches, but came up level after a mile or so!

I surmised that the nivomats were OK.