I have a 2005 sx2.0. Every once and awhile the signal multi functional lever buzzes. Sometimes when bumped it does it and if its making the noise sometimes bumping it helps. Thinking i need a new one but any other areas i should check first. Headlights and signal lights still work but it is getting more frequent so want to do it soon.

 

Does it make the noise when electrically activated, or when doing nothing/at rest/not activated?

 

On the rough days lol it will start buzzing sometimes when lightly bumping the lever. Usually though it does not start untill you change light settings or use the signal lights. My wife drove to school and the store yesterday morning, then it started acting up on her way home at the end of day

 

I was trying to determine if the buzz was mechanical, like a loose piece of plastic, or a broken spring, or electrical/arcing & if electrical it likely needs attention without delay.

So, lets think about this some more. Did the noise come about suddenly after some event?
Does the noise come about within a particular engine rpm range?
When the lever is in the active mode & the noise is heard, are any of the lights being activated, acting out, like flickering, or being dim, in tune with the buzz?
Do you have fog lights?

 

Noise started randomly, no major event before hand. And it does sound more electrical than a loose piece of plastic. When its buzzing and activated all lights seem to be functioning as usual. Anothet note. When this noise is happening sometimes the fog light indicator light on dash illuminates dim. But the fog lights have never worked on this car.

 

Ok, that's good feedback about having fog lights, their not working & the light indicator flickering. I agree it now sounds more likely to be an electrical rooted multifunction switch problem.
If these are factory fogs, the fog lamps electrical load is directly wired to & carried by the multifunction switch contacts & they are known to over heat & melt the thermoplastic switch components & cause mischief, so the multifunction switch likely belongs fairly high up on your suspect list.
If you replace it, might be wise to install a power relay to handle the fog light electrical load. A relay can be installed a number of ways, depending on how you'd like the fogs to come on.
One way would be to have the function switch to activate the power relay solenoid, to have the solenoid contacts switch the fog lamp electrical load, as the relay solenoid electrical load is Way less than fog lamp filaments, which would really drop the multifunction switch heat load.
Wired this way the fogs would come on as they do now, when the low beams are turned on.
You could wire in a switch between the multifunction lead & the power relay solenoid, so you could activate the fogs as you like, when the head lamps are on.
Or, you could wire the relay on a separate fused circuit, with a switch to turn the fogs on when ever you like, independent of the head light switch. As in the last scenario, the fogs aren't being activated by the head light, or multifunction switch, it won't be carrying Any of the fog light circuit load, as the fogs would now be on their separate fused & switched electrical feed.
A bunch more thoughts for consideration, let us know what you find.

 

The combination flasher is attached to the MF switch. That's likely your buzzing.