Pass data from view to controller

PHP Code:

public function car()
    {  
            $id = $this->uri->segment(2);
            $this->load->model('Vehicle_Model);
            $data['vehicle'] = $this->Vehicle_Model->get_vehicle_by_id($id);
            $this->load->view('car', $data);
    } 


Also, are you sure about the $id?
try it first with this:

PHP Code:

public function car()
    {  
            $id = $this->uri->segment(2);
  echo $id;
  die();
} 


Plus, in your view use them this way

           

PHP Code:

<?php echo $vehicle_item->description; ?>