Occasionally I hear/feel a bumping/knocking noise when the Autostop kicks in on my used HCH 2003. At first I thought it was the braking, however, when the Autostop is forced off (AC on, ECON off) I don't hear this noise.

Has anyone else experienced this?

Arun

P.S. Getting 44-46 mpg with usual driving (I observe speed limits). Love it!