it is usually the rear brake cylinder that's leaking and needs to be replace on that side.
I found out it`s the cylinder
your wheel cylinder is leaking,you will need to buy a rebuilt or new whl cylinder also new brake shoes and a can of brake cleaner.
brake fluid leaking from a brake drum indicates the brake slave cylander on that wheel is leaking and needs to be replaced you will not see the actual leak with out removing the brake drum
Brake fluid in a Toyota Sequoia could be leaking from several places. Check the wheel cylinders first as they are a common place to leak.
Rebuild the cylinders on that caliper.
Seal in brake caliper is leaking and needs replacement Flexible brake line to the caliper is leaking and needs replacement
Either a brake line/flexi line has blown, a union has failed or a wheel cylinder is leaking. Do not drive the vehicle until it is repaired, diagonally opposite brakes are inoperative.
IF you have rear wheel drive it may be a grease seal for the rear differential. Otherwise it is probably a wheel cylinder. Check your brake fluid level. GEt this fixed ASAP- Safety concern. Wheel cylinder, brake fluid.. If it's a rear wheel drive vehicle, it may be the axle seal leaking as well. Hello... hello...
You might be out of brake fluid. Our rear wheel cylinder was leaking and ran ours out of fluid and the light came on.
Hub seal is leaking
change the wheel cylinders or the brake lines
Probably brake fluid, your caliper seal may have gone bad