Brake position sensor?

[KU40 173]

Today a dude pulled up next to me at a stoplight and said my brake lights don't work. So I come home and mess around and find out that the sensor that's attached to the brake pedal isn't doing it's job correctly. It seems like when I push the brake pedal it doesn't trip the sensor. I can push up the sensor and it turns my brake lights on. So do I need a new one or can this one just be adjusted somehow? and what's it exactly called anyways, since I've been trying to look it up online and can't find the part?

[KU40 173]

nvm, finally found it. brake light switch. I'm glad it's only a 10-15 dollar part! but I read to try spraying the hinge with wd-40 first, so I'm going to try that.