diff --git a/src/package/packageBundleVersionCreate.ts b/src/package/packageBundleVersionCreate.ts
index 3c32d6626..215027fcc 100644
--- a/src/package/packageBundleVersionCreate.ts
+++ b/src/package/packageBundleVersionCreate.ts
@@ -174,8 +174,8 @@ export class PackageBundleVersionCreate {
       return bundleVersionComponents.map((component) => {
         const packageVersion = component.packageVersion;
 
-        // Check if it's already an ID (04t followed by 15 characters)
-        if (/^04t[a-zA-Z0-9]{15}$/.test(packageVersion)) {
+        // Check if it's a package version ID (04t prefix, 15 or 18 characters)
+        if (/^04t[a-zA-Z0-9]{12,15}$/.test(packageVersion)) {
           return packageVersion;
         }
 
diff --git a/test/package/bundleVersionCreate.test.ts b/test/package/bundleVersionCreate.test.ts
index af7ddf260..d8f980e3a 100644
--- a/test/package/bundleVersionCreate.test.ts
+++ b/test/package/bundleVersionCreate.test.ts
@@ -585,6 +585,75 @@ describe('PackageBundleVersion.create', () => {
       fs.unlinkSync(componentsPath);
     });
 
+    it('should accept 15-char package version IDs', async () => {
+      const componentsPath = path.join(project.getPath(), 'bundle-components.json');
+      const components = [
+        { packageVersion: '04t5f000000WM9y' }, // 15-char ID
+        { packageVersion: '04t000000000000003' }, // 18-char ID
+      ];
+      fs.writeFileSync(componentsPath, JSON.stringify(components));
+
+      let capturedRequest: { BundleVersionComponents: string } | undefined;
+      Object.assign(connection.tooling, {
+        sobject: () => ({
+          create: (req: { BundleVersionComponents: string }) => {
+            capturedRequest = req;
+            return Promise.resolve({
+              success: true,
+              id: '0Ho000000000000',
+            });
+          },
+        }),
+        query: () =>
+          Promise.resolve({
+            records: [{ BundleName: 'testBundle' }],
+          }),
+      });
+
+      Object.assign(connection, {
+        autoFetchQuery: () =>
+          Promise.resolve({
+            records: [
+              {
+                Id: '0Ho000000000000',
+                RequestStatus: BundleSObjects.PkgBundleVersionCreateReqStatus.success,
+                PackageBundle: { Id: '0Ho123456789012' },
+                PackageBundleVersion: { Id: '1Q8000000000001' },
+                VersionName: 'ver 1.0',
+                MajorVersion: '1',
+                MinorVersion: '0',
+                Ancestor: null,
+                BundleVersionComponents: JSON.stringify(components),
+                CreatedDate: '2025-01-01T00:00:00.000Z',
+                CreatedById: '005000000000000',
+                ValidationError: '',
+              },
+            ],
+          }),
+      });
+
+      const options: BundleVersionCreateOptions = {
+        connection,
+        project,
+        PackageBundle: 'testBundle',
+        MajorVersion: '1',
+        MinorVersion: '0',
+        Ancestor: null,
+        BundleVersionComponentsPath: componentsPath,
+      };
+
+      const result = await PackageBundleVersion.create(options);
+      expect(result).to.have.property('RequestStatus', BundleSObjects.PkgBundleVersionCreateReqStatus.success);
+
+      // Verify both 15-char and 18-char IDs are passed through to the API
+      expect(capturedRequest).to.not.be.undefined;
+      const sentComponents = JSON.parse(capturedRequest!.BundleVersionComponents) as string[];
+      expect(sentComponents[0]).to.equal('04t5f000000WM9y'); // 15-char passed through
+      expect(sentComponents[1]).to.equal('04t000000000000003'); // 18-char passed through
+
+      fs.unlinkSync(componentsPath);
+    });
+
     it('should handle invalid bundle components format', async () => {
       const componentsPath = path.join(project.getPath(), 'bundle-components.json');