50000 MI or 80000 KM

Check
    Brakes and Traction Control
      Inspect brake linings/drums and brake pads/discs
Tighten/Torque
    Body and Frame
      Inspect nut and a bolts on chassis and body
Inspect
    Steering
      Inspect steering linkage
    Air Filter Element
Replace
    Oil Filter, Engine
    Engine Oil
Rotate
    Tires