to preface: I'm fairly new to cars. I know my way around basic things (change my own oil, diagnose coolant leaks, etc) and essentially rebuilt the engine on my motorcycle so I'm not a COMPLETE noob, but give me a second if you mention something and I go, "...huh?"

Okay.
I noticed my bake fluid was leaking so I refilled it, parked on a dry surface and waited overnight to find a puddle. Lo and behold it was the passenger side, rear wheel.

I took the wheel off, and stared at a bunch of stuff I have no idea what it is.
The leak is coming from the inside of the caliper (I'm fairly sure), but after that I have NO clue.
I managed to snap some crappy pictures with my phone so I hope that helps you guys give me an idea of what to do next:

This is looking up and out from behind everything (the wheel being off of course). You can see the bolt at the top where the general leak is coming from and it falling onto the hose below.


here's two more that are essentially the same thing:





(i'm 100% certain its not a small hole or anything in that lower hose, I cleaned that and watched the fluid drip onto it, not from it)

So my question is simple, what do I do? Whats the next step?

Thanks a ton!

 

you are probably looking at a piston seal or such. you can rebuild it but I am not sure where to get the parts from

 

That's the rear caliper correct? They are a little more expensive than the front.

I haven't seen a rebuild kit for the calipers for a long time but you can order the caliper
itself and just send in your old as a core item; you end up paying around 70 bucks.

I know its not that cheap but the rears are always more expensive cause of the e-brake.

 

Yes its the rear caliper. Unfortunately I'm beginning to realize I don't have quite the tools or space to do this. I hoped it had been a quick take-this-bolt-off-and-replace-it-with-this-one, but likely not. Also as brakes tend to be important from time to time I'll leave this to a professional.
Also, don't brakes have to be done in pairs? And yes rear brakes with e-brake and all... I suppose it has to be done.

 

Piston and seal kit wouldn't solve that one. That's leaking from the e-brake lever. Better just get a rebuilt caliper...about $75. No need to do them in pairs. It's the beautify of hydraulics. The new one isn't going to press any harder than the old one.

 

replacement caliper

thanks again to everyone who helped