Brake Drum Wheel Cylinder problems of the 2010 Toyota 4Runner

Tl the contact owns a 2010 Toyota 4runner. When the brake pedal was depressed, it traveled to the floorboard. The vehicle was not diagnosed by a dealer. The contact, an independent mechanic, planned to inspect and test the brake system himself. The contact stated that the front and rear brakes had been bled extensively; however, the rear brake cylinder failed to function. The manufacturer had not issued any brake system recalls; however, a TSB was issued on September 9, 2013 (t-sb-0141-13) for the brakes. The manufacturer was notified. The vehicle was not repaired. The VIN was not available. The approximate failure mileage was 45,000.