Shock absorbers have durability 1500, better than steel plating but not as good as military composite armor. They don’t have any inherent damage resistance, which is probably a bug.
Ideally, they would provide minimal damage resistance against everything but crash shock damage, which is the damage that applies to all vehicle parts in a crash, and they’d be amazing at that. I think I can puzzle through the collision code just enough to make that happen, but it’s still going to be a while before I can implement it.