Hi all,

Just wondering if any came across this loud buzzing noise coming from our sedans stock muffler.
I started my car like usual tonight after working, and I heard this really loud buzzing noise coming from the outside of my car. My windows were up and the radio was off at the time, but I heard somekind of sharp buzzing noise on the outside of my car. When I walked around to the tail end of the car by the muffler, the noise became louder and sharper.
Should I bring my car to the dealership for service, or is this kind of sound fixable on our own? I'm kindda worried of my car now, coz I heard that same sound a second time after I came back home, and restarted the car. Is this something I should really worry about?

Any thoughts, opinions, and/or suggestions would help me a lot. Thanks.