diff --git a/services/brand.service.js b/services/brand.service.js
index 9bf28b2..883a62d 100644
--- a/services/brand.service.js
+++ b/services/brand.service.js
@@ -9,6 +9,13 @@ const {
   checkBrandNameExistsDb,
 } = require("../db/brand.db");
 
+const {
+  insertMultipleBrandSparepartsDb,
+  updateBrandSparepartsDb,
+  deleteAllBrandSparepartsDb,
+  getSparepartsByBrandIdDb,
+} = require("../db/brand_sparepart.db");
+
 // Error code operations
 const {
   getErrorCodesByBrandIdDb,
@@ -33,9 +40,21 @@ class BrandService {
     try {
       const results = await getAllBrandsDb(param);
 
-      results.data.map((element) => {});
+      // Add spareparts data for each brand
+      const brandsWithSpareparts = await Promise.all(
+        results.data.map(async (brand) => {
+          const spareparts = await getSparepartsByBrandIdDb(brand.brand_id);
+          return {
+            ...brand,
+            spareparts: spareparts
+          };
+        })
+      );
 
-      return results;
+      return {
+        ...results,
+        data: brandsWithSpareparts
+      };
     } catch (error) {
       throw new ErrorHandler(error.statusCode, error.message);
     }
@@ -47,6 +66,9 @@ class BrandService {
       const brand = await getBrandByIdDb(id);
       if (!brand) throw new ErrorHandler(404, "Brand not found");
 
+      // Get spareparts for this brand
+      const spareparts = await getSparepartsByBrandIdDb(brand.brand_id);
+
       const errorCodes = await getErrorCodesByBrandIdDb(brand.brand_id);
 
       const errorCodesWithSolutions = await Promise.all(
@@ -95,6 +117,7 @@ class BrandService {
 
       return {
         ...brand,
+        spareparts: spareparts,
         error_code: errorCodesWithSolutions,
       };
     } catch (error) {
@@ -102,6 +125,7 @@ class BrandService {
     }
   }
 
+  
   // Create brand
   static async createBrandWithFullData(data) {
     try {
@@ -154,6 +178,10 @@ class BrandService {
 
       const brandId = createdBrand.brand_id;
 
+      if (data.spareparts && Array.isArray(data.spareparts) && data.spareparts.length > 0) {
+        await insertMultipleBrandSparepartsDb(brandId, data.spareparts, data.created_by);
+      }
+
       for (const errorCodeData of data.error_code) {
         const errorId = await createErrorCodeDb(brandId, {
           error_code: errorCodeData.error_code,
@@ -184,7 +212,8 @@ class BrandService {
         }
       }
 
-      return await this.getBrandById(brandId);
+      const createdBrandWithSpareparts = await this.getBrandById(brandId);
+      return createdBrandWithSpareparts;
     } catch (error) {
       throw new ErrorHandler(500, `Bulk insert failed: ${error.message}`);
     }
@@ -231,6 +260,10 @@ class BrandService {
 
       await updateBrandDb(existingBrand.brand_name, brandData);
 
+      if (data.spareparts !== undefined) {
+        await updateBrandSparepartsDb(existingBrand.brand_id, data.spareparts || [], data.updated_by);
+      }
+
       if (data.error_code && Array.isArray(data.error_code)) {
         const existingErrorCodes = await getErrorCodesByBrandIdDb(id);
         const incomingErrorCodes = data.error_code.map((ec) => ec.error_code);
@@ -350,7 +383,8 @@ class BrandService {
         }
       }
 
-      return await this.getBrandById(id);
+      const updatedBrandWithSpareparts = await this.getBrandById(id);
+      return updatedBrandWithSpareparts;
     } catch (error) {
       throw new ErrorHandler(500, `Update failed: ${error.message}`);
     }
diff --git a/validate/brand.schema.js b/validate/brand.schema.js
index 3f5d99a..5d9d30f 100644
--- a/validate/brand.schema.js
+++ b/validate/brand.schema.js
@@ -10,6 +10,7 @@ const insertBrandSchema = Joi.object({
   brand_model: Joi.string().max(100).optional().allow(""),
   is_active: Joi.boolean().required(),
   description: Joi.string().max(255).optional().allow(""),
+  spareparts: Joi.array().items(Joi.number().integer()).optional(), // Array of sparepart_id
   error_code: Joi.array()
     .items(
       Joi.object({
@@ -56,6 +57,7 @@ const updateBrandSchema = Joi.object({
   brand_model: Joi.string().max(100).optional().allow(""),
   is_active: Joi.boolean().required(),
   description: Joi.string().max(255).optional().allow(""),
+  spareparts: Joi.array().items(Joi.number().integer()).optional(), // Array of sparepart_id
   error_code: Joi.array()
     .items(
       Joi.object({