I'm currently having some serious brakes problems. I've now opened up and had a look at the brakes on both the rear driver and passenger side. The biggest problem at the moment is, the rear passenger side wheel area is leaking brake fluid. I can't quite identify what the tubing/ brake line is where the leak is coming from. In my manuals/ diagrams, there's a brake fluid line that goes into the top of the caliper area, but the leak is coming from a different line that runs underneath. I've attached an image here. It's the tube/ line right in the center of the image.
Everything looks intact on the driver's side. I have pads to do a replacement but haven't been able to rotate the caliper on the passenger side to do the installation. The top caliper pin ("rear brake pin retainer") loosens easily, but the bottom one may be stuck/ seized.
If someone can identify what this component is that's leaking that'd be a start.
The piston on the rear caliper itself may be leaking. If i were you i would
get a replacement caliper. Once you unstick the stuck caliper pins,
Get some proper high temp pin lube and lube them up (make sure you do
the other side too) Most people with rear disks that have not had them
done in awhile probably have a least one stuck caliper pin
You will have fun with the emergency brake curly spring.
you will also need to get a caliper tool to screw in the caliper
(DONT push it in like a front caliper) The tool looks like a little open cube
If you really unsure whats leaking, get some good degreaser and spray
it down and wash it all off. Then drive it for awhile and look for th fresh