Timing Tensioner problems of the 2006 Ford Ranger

Ford 4. 0 sohc v6 timing chain hydraulic tensioner, timing chain cassette and timing chain failure providing no start situation. Ford is well aware of this problem. It is widespread across models with this engine, Rangers, explorers and mustangs. Starting with model year 2001 when they began using the 4. 0 sohc until end of production of this engine, 2011 they should be held responsible for low mileage failures. My vehicle has less then 70,000 miles. Timing chain shouldn't fail and dealership should pay for repair. I was parked, went to start it and it backfired and wouldn't start and hasn't since. Diagnosed and determined it was timing chain. Again, the 4. 0 has had this problem from start of production across many models and years. Ford should be held responsible since they acknowledge this problem.