1. Mechanical
   1. Brakes Worn
      1. Miles Driven Exceeds Life
      2. Driver Constantly Presses Brake
      3. Caliper is Bad
      4. Brake Pad is Worn
      5. Piston is Bad
         1. Seals are Worn
      6. Rotor is Worn
         1. Too Thin
         2. Warped
      7. Hub is Cracked
         1. Extreme Temp
         2. Trauma
   2. Tires Worn
      1. Miles Driven Exceeds Life
      2. Aggressive Driving
      3. Not Properly Inflated
      4. Wrong Tire Size
   3. Suspension Worn
      1. Shock Absorbers Are Clunking
      2. Tires Are Worn Uneven
         1. Misalignment
      3. Ball Joints Are Worn
   4. Engine Failure
      1. Miles Driven Exceeds Life
      2. Not Enough Oil
      3. No Tune-Up
         1. Air Filter Not Changed
         2. Spark Plug Not Changed
         3. Spark Plug Wires Not Changed
         4. Oil & Filter Not Changed
         5. Distributor Cap Not Changed
      4. Engine Modifications
         1. Affect Performance
         2. Introduce Problems
2. Driver
   1. Not Maintaining Vehicle
      1. Inexperienced
         1. New Driver
         2. Doesn't Care
      2. Doesn't Read Owners Manual
      3. Doesn't Have an Owners Manual
      4. Not Aware of Maintenance Sched
3. Environment
   1. Weather
      1. Car Won't Start
         1. Not Enough Cranking Amps
            1. Extremely Cold Temp
            2. Winter Season
            3. Extremely Hot Temp
            4. Summer Season
      2. Air Too Salty
         1. Live Near The Sea
      3. Too Much Smog
         1. Air Polluted
4. Electrical
   1. Battery Too Weak
      1. Battery Too Old
      2. Corrosion
         1. Cracked Battery
      3. Alternator Not Charging
         1. Miles Driven Exceeds Life
   2. Dashboard Lights Flickering
      1. Alternator Could be Bad
      2. Short Circuit in Electrical Wires
         1. Wire Damaged
            1. Trauma
         2. Corrosion
            1. Moisture
   3. Alternator Worn
      1. Bushings Worn
      2. Contaminated
5. Material
   1. No Oil
      1. Driver Doesn't Check
         1. No aware of Maintenance Sched
         2. Doesn't Read Owners Manual
         3. Doesn't Have an Owners Manual
   2. Fuel
      1. Wrong Fuel
         1. Wrong Octane
      2. Bad Fuel
         1. Water In Fuel
         2. Contaminated
   3. Catalytic Converter
      1. Bad Fuel Mixture
      2. Wrong Oxygen to Nitrogen Mixture
   4. Fuel Filter
      1. Miles Driven Exceeds Life
6. Methods
   1. Not Recording Maintenance Sched
      1. Don't Have Anywhere to Record It
      2. It's Too Hard
      3. It Take Too Much Time
      4. Forget To Record It
         1. There Is Nothing To Remind Me
      5. Can't Find Records
         1. Don't Know Where They Are