diff --git a/mechanic-pwa/frontend/src/api/repairsCreate.ts b/mechanic-pwa/frontend/src/api/repairsCreate.ts
index 0d3bcce..cc508e8 100644
--- a/mechanic-pwa/frontend/src/api/repairsCreate.ts
+++ b/mechanic-pwa/frontend/src/api/repairsCreate.ts
@@ -65,8 +65,14 @@ export interface CreateOilChangePayload {
   sticker_extension: string | null;
 }
 
+export interface ExternalCarPayload {
+  plate: string;
+  make: string | null;
+}
+
 export interface CreateRepairPayload {
-  car_id: number;
+  car_id?: number;
+  external_car?: ExternalCarPayload;
   mileage: number | null;
   works: CreateWorkPayload[];
   parts: CreatePartPayload[];