How to send a selected value from a dropdown to a controller in MVC and Jquery/Ajax

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C#

Javascript

Ajax

MVC

jQuery

Hi All,

I need to get the selected value from a dropdown using jquery. Then i want to send this selected value to an Action Result Method in my controller possibly using Ajax call . As i am pretty new at this i'm not so sure on how i would achieve this.
so i have got an Action Method like this in my Controller ...

       public ActionResult GetVehiclePart(string id)
       {    //i did like to send the selected value to this controller and filter data  like below
             var _partNumber = _catalogue.CatalogueData.FirstOrDefault(x => x.Partnumber         == id        && x.Veh_ID == selectedValue);
return PartialView("_Vehicle", _partNumber)
       }

And in my script file

//getting the value using jquery
  var vehicle = $("#ModelResult").val();
                            $.ajax({

                                type: 'GET',
                                url: '../../VehiclesController/GetVehiclePart/' + vehicle,
                                dataType: 'json',
                                success: function (data) {

                                    vehicle = $("#ModelResult").val();
                                    console.log(vehicle); // the value is printing here not sure how to post it to the controller


                                },
                                async: false

                            });

I may be doing something wrong here but if someone would help on how to achieve i would really appreciate it .. Thank you