Rear Disc & Drum Brakes
Guide To Diagnostics & Repairs - Car Mechanic Simulator 2015
Many of the vehicles have rear wheel drum brakes. For these you'll have the brake drum, brake shoes, and wheel cylinder. The wheel cylinder is the only part here that is likely able to be repaired.
For vehicles with rear disc brakes, you'll have a calliper, brake pads, and brake disc. Only the calliper is likely able to be repaired. The other parts will have to be purchased.