Mine cracked... down the middle during a ride on July 3rd. Crack was in the same location that others have reported - vertical on the front side of the tank. I currently have 23k miles on my '08 SM5, and other than brake squeal and a small caliper leak, this is the only problem that I've had. Fortunately, the leak was small enough for me to make it home. Be warned though, there does seem to be a systemic problem with these reservoirs. I picked up another one at Bert's Mega Mall - price with shipping and a couple of hose clamps was around $80.