diff --git a/app/Services/RepuveService.php b/app/Services/RepuveService.php
index dfda03d..a3c44f9 100644
--- a/app/Services/RepuveService.php
+++ b/app/Services/RepuveService.php
@@ -118,7 +118,11 @@ public function consultarPadron(string $niv)
         $this->asegurarCargaCredenciales();
 
         $url = $this->baseUrl . $this->roboEndpoint;
-        $arg2 = $niv . '|||||||';
+
+        // 8 posiciones: [0]=NIV, [1]=vacío, [2]=placa, [3-7]=vacíos
+        $campos = array_fill(0, 8, '');
+        $campos[0] = $niv;
+        $arg2 = implode('|', $campos);
 
         $soapBody = <<<XML
         <soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:wsdl="http://consultaRpv.org/wsdl">
@@ -278,14 +282,12 @@ public function verificarRobo(?string $niv = null, ?string $placa = null): array
 
             $url = $this->baseUrl . $this->roboEndpoint;
 
-            // Construir arg2 según los parámetros enviados
-            if (!empty($niv) && !empty($placa)) {
-                $arg2 = $niv . '|' . $placa . str_repeat('|', 5);
-            } elseif (!empty($niv)) {
-                $arg2 = $niv . str_repeat('|', 7);
-            } else {
-                $arg2 = '||' . $placa . str_repeat('|', 5);
-            }
+            // 8 posiciones: [0]=NIV, [1]=vacío, [2]=placa, [3-7]=vacíos
+            // Ejemplo: LSGHD52H0ND032457||WNU700B|||||
+            $campos = array_fill(0, 8, '');
+            $campos[0] = $niv ?? '';
+            $campos[2] = $placa ?? '';
+            $arg2 = implode('|', $campos);
 
             Log::channel('repuve_nacional')->info('REPUVE verificarRobo: Cadena construida', [
                 'niv' => $niv,
@@ -384,12 +386,12 @@ public function consultarVehiculo(?string $niv = null, ?string $placa = null)
 
             $url = $this->baseUrl . '/jaxws-consultarpv/ConsultaRpv';
 
-            // Construir arg2: NIV||||||||
-            if ($placa) {
-                $arg2 = ($niv ?? '') . '|' . $placa . str_repeat('|', 5);
-            } else {
-                $arg2 = ($niv ?? '') . str_repeat('|', 7);
-            }
+            // 8 posiciones: [0]=NIV, [1]=vacío, [2]=placa, [3-7]=vacíos
+            // Ejemplo: LSGHD52H0ND032457||WNU700B|||||
+            $campos = array_fill(0, 8, '');
+            $campos[0] = $niv ?? '';
+            $campos[2] = $placa ?? '';
+            $arg2 = implode('|', $campos);
 
             $soapBody = <<<XML
         <soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:wsdl="http://consultaRpv.org/wsdl">