diff --git a/templates/customer/form.html.twig b/templates/customer/form.html.twig
index e6d2fd09..bc4d8074 100644
--- a/templates/customer/form.html.twig
+++ b/templates/customer/form.html.twig
@@ -934,7 +934,7 @@
 			$("#vehicle-form-modal").on('hidden.bs.modal', function(e) {
 				$("#flag-motolite-battery").prop('checked', false).change();
 				$("#flag-active").prop('checked', true);
-				$("#vehicle-form").find("input[type='text'], select").val("").change();
+				$("#vehicle-form").find("input[type='text'], input[type='hidden'], select").val("").change();
 				removeVehicleErrors();
 			});
 
@@ -979,7 +979,7 @@
 						field: 'model_year',
 						title: 'Year',
 						template: function (row, index, datatable) {
-							return row.model_year + '<div class="form-control-feedback hide" data-field="model_year"></div>';
+							return (typeof row.model_year !== 'undefined' ? row.model_year : '-') + '<div class="form-control-feedback hide" data-field="model_year"></div>';
 						}
 					},
 					{