The mass flow sensor is mounted off the engine to reduce vibration, as
many are. The engine is rubber mounted to reduce vibration from reaching
the body, as all cars are. The problem seems centered around the
thickness of the hose convolutions, which must be about 3/16" thick.
There are three of them and they are very thick. Like any flexing
member, given the same deflection, the thicker the cross sections the
higher the stress. They should have either added more convolutions,
deepened the convolution heights, or thinned the cross section. I fixed
it by just gluing nitrile o-rings into the cracked grooves using marine
Goop.