// this should work for a belongsToMany relationship where DriverCar is the join table
Driver.findOne({
  where: {id: 10},
  include: [{
    model: Car
  }]
})

// this should work where Driver hasMany DriverCar and Car hasMany DriverCar
Driver.findOne({
  where: {id: 10},
  include: [{
    model: DriverCar,
    include: [{
      model: Car
    }]
  }]
})