I agree with Gairwyn. It could it be debris in your brake area? It's happened to me before. The noise would only reappear at slower speeds. I removed my wheel and checked for foreign objects around the braking system.

Although, this is not related to the boiling noise I'm hearing, which I have not encountered for two days now.

 

Boiling sound: Force the A/C on and listen.

 

Spinner,

I've tried multiple attempts at forcing the AC on and the boiling sound did reappear only once. It is hard to pinpoint the exact cause of this sound. My guess is that I don't drive long enough to heat my engine to get to the trigger point.

 

That has happened to me..but it was the AC. The AC still runs on auto stop. Plus, the blower makes a noise too.

I turned off the AC and blower...and it is so quite on Auto Stop, the only thing I hear is the GAS in the tank swishing around.