Brake light stuck on, found problem, need part ID

[AdoreGSX]

My brake lights were stuck on. After tons of trouble shooting, I find a few pieces of tiny broken plastic beside my floormat. When the brake pedal depresses, a smell plastic knob lets off of a sensor that triggers the brake lights. This small plastic knob broke. What do I call this and where can I get it besides satan?

 

[born2tune]

get one at the junk yard, its called a brake light switch. maybe autozone might carry it as its not really elcipse specific, or atleast order one for you...

or a new or used one on ebay like this one:

J2 97 MITSUBISHI ECLIPSE BRAKE LIGHT SWITCH | eBay

 

[19Eclipse90]

It's called a brake pedal stopper (MB151298) and I agree that if you don't want to go to the dealership or any of the supporting OEM parts vendors with the part number, a junkyard or a part out is going to be your best bet for an original replacement.