Buzzing on startup

[benzdude]

Hi all,

Lately I have noticed that there is a moderately loud buzzing sound coming from the front passenger side of the engine compartment at startup. The buzzing continues for about a minute and then stops completely. It does this every time and stops buzzing at the exact same time interval after starting.

Is there an obvious cause (ie: common problem on these cars) that you would immediately be suspicious of? I'm just trying to get some ideas before I actually start poking around under the hood this weekend.

Thanks!