Rear drum leak?

Help. I noticed my brake light came on yesterday, then turned off. Today it turned on again. I checked the brake fluid and it was pretty low. I filled it and brake lines light gone. But I did notice grease build up on the rear passenger drum. The drivers side looks dry. Could it be differential fluid leak or a brake line leak? And how to fix? And do you think the dealer will fix this? It's 2012 sport.

 

I was wrong, edited to not confuse others with the same problem.

 

If you are still under 3year 36k warranty or if you have optional extended warranty yes dealer will fix under terms of warranty if not its got to be fixed as it will render brakes on that wheel useless.

 

I did see a brake light warning and my brake fluid was low. Refilled and the brake light went away

 

Brake warning light coupled with the fluid running out of the drum area and low fluid all points to a leak either the line going to the wheel cylinder or the wheel cylinder itself.

As others said pull the wheel and drum off and have a look. Fluid inside the drum would be the wheel cylinder leaking. If the fluid is just on the outside area of the drum back plate it is probably the hard line going to the wheel cylinder.

 

Brake cylinder.

Decrease replace and repaint.

 

So I checked the brake bleeder bolt and it had some play and the little rubber cap was missing. Found it this morning in my driveway. I tightened it and put the cap on. Will have a buddy of mine (toyota tech)check it out.

 

Aha! Then my suspicion was wrong. Sorry!

 

No worries. Had me worried if it was an axle seal. Made me check the breather. Iooks good.