A few things. 180k miles for one, but also was having an occasional mild vibration (gone now). And when I crawled up under awhile ago it looked pretty collapsed. Thought I would give them a try, considering changing mounts on my w123 was pretty night and day. Glad to finally get around to doing them, I bought the mounts maybe like a year ago now lol. I want to say there was some sort of sale on FCP, I don't remember anymore. Also should note that at some point they did say leaking whatever fluid is inside.