u/Into-Fat-Air

Can someone give me the “explain it to me like I’m 5” version of the difference? I just passed my IEC entrance exam and the office wasn’t very clear on what exactly that means. Hopefully this is the right sub to ask.

I know it’s not a huge accomplishment but as a 26 year old who’s never worked on a car a day in his life, I’m pretty proud. It was pretty easy overall. Plus I saved $300 by doing it myself instead of letting Toyota take care of it