diff --git a/frontend/src/lib/api.ts b/frontend/src/lib/api.ts
index b5b8116f..00872354 100644
--- a/frontend/src/lib/api.ts
+++ b/frontend/src/lib/api.ts
@@ -365,7 +365,27 @@ async function fetchApi<T = any>(
 						"SERVIDOR FTP": "ftp_server",
 						"USUARIO FTP": "ftp_user",
 						"CLAVE ACCESO FTP": "ftp_password",
-						"DIRECTORIO FTP": "ftp_directory"
+						"DIRECTORIO FTP": "ftp_directory",
+						// Vehicles
+						CLAVE: "vehicle_key",
+						"CLAVE ACE": "ace_vehicle_key", // Fallback for vehicles
+						"CLAVE TRANSPORTE": "transporter_key",
+						VIN: "series",
+						"TIPO TRANSPORTE": "transport_type",
+						"CODIGO DE ENTIDAD": "entity_code",
+						TRANSPONDEDOR: "transponder_number",
+						"NUMERO DOT": "dot_number",
+						PLACAS: "plate_number",
+						PRECINTO: "seal",
+						"EMPRESA ASEGURADORA": "insurance_company_name",
+						"NUM. ASEGURADORA": "insurance_number",
+						"MONTO ASEGURADO": "insurance_amount",
+						"FECHA DE ASEGURADORA": "insurance_date",
+						// Trailers
+						"NUMERO TRAILER": "trailer_number",
+						"TIPO TRAILER": "trailer_type_key",
+						"CODIGO ENTIDAD": "entity_code",
+						"CLAVE CONTENEDOR": "container_key"
 					};
 
 					const normalizedErrors = d.errors.map((err) => ({
diff --git a/frontend/src/lib/components/dashboard/transportation/vehicles/create-edit-dialog.svelte b/frontend/src/lib/components/dashboard/transportation/vehicles/create-edit-dialog.svelte
index 9ddbdd2e..17bc0ce5 100644
--- a/frontend/src/lib/components/dashboard/transportation/vehicles/create-edit-dialog.svelte
+++ b/frontend/src/lib/components/dashboard/transportation/vehicles/create-edit-dialog.svelte
@@ -196,6 +196,10 @@
 				throw new Error(tv('vehicle_key_required'));
 			}
 
+			if (!isEdit && !formData.entity_code) {
+				throw new Error('El Código de Entidad es obligatorio para nuevos vehículos');
+			}
+
 			let response;
 			if (isEdit && item) {
 				response = await vehiclesApi.update(item.vehicle_key, formData, companyId);
@@ -204,9 +208,9 @@
 			}
 
 			if (response.error) {
-				const ve = (response as { validationErrors?: { msg?: string }[] }).validationErrors;
+				const ve = response.validationErrors;
 				if (ve?.length) {
-					throw new Error(ve.map((e) => e.msg).join(' · '));
+					throw new Error(ve.map((e) => e.message).join(' · '));
 				}
 				throw new Error(response.error);
 			}
@@ -372,7 +376,7 @@
 							</div>
 
 							<div class="grid gap-2">
-								<Label for="entity_code">{tv('label_entity_code')}</Label>
+								<Label for="entity_code">{tv('label_entity_code')} <span class="text-destructive">*</span></Label>
 								<Select.Root type="single" bind:value={formData.entity_code}>
 									<Select.Trigger class="w-full" id="entity_code">
 										{ENTITY_OPTS.find((o) => o.value === (formData.entity_code || ''))?.label ??