I have just replaced one at 63k. I have only had the car for two weeks and have put on approx 800 miles in that time....

Cheers

Only every had one replaced in 90K and 6.5 years of ownership. And to be fair it was caused by somthing else.

I think I've got a complete new set now - certainly I've had three out of the four replaced in the last twelve months. But I'm on 100k, 6 years so I wouldn't say they were weak as such.

Console bushes, on the other hand... :(