My friend's M3 only got about 10k on his Bilsteins before the two rears gave out. They were likely defective shocks though. Most aftermarket shocks (like Bilsteins) have a lifetime warranty though, so it's not too much of an issue. Just make sure that whatever set you buy has one.
I called TEIN and they said about 75K of track miles you should replace their coilovers. considering normal driving is a bit tougher than tracking a car with respect to bumps and potholes i say about 65K is decent
how do aftermarket shocks compare to stock shocks in durability ?
basically, about how long are the stock shocks expected to last ?
i've got nearly 30k on my car, and i'm thinking about changing the stock shocks. is it normal for the stock shocks to be noticeably worn around this mileage ?
Monroe shocks have lifetime warranties as well, but that doesn't mean they're good. Besides, a significant portion of the cost in getting new shocks is in the installation/alignment. Lifetime warranties don't save much. Come on folks, anyone have prior experience with Koni/KYB/Tokico/Bilstein shocks for a while ? How long do they last ?