diff --git a/packages/upgrade/src/common/downgrade_component.ts b/packages/upgrade/src/common/downgrade_component.ts
index 62d90fc2b7..95722f7d76 100644
--- a/packages/upgrade/src/common/downgrade_component.ts
+++ b/packages/upgrade/src/common/downgrade_component.ts
@@ -13,8 +13,6 @@ import {$COMPILE, $INJECTOR, $PARSE, INJECTOR_KEY, REQUIRE_INJECTOR, REQUIRE_NG_
 import {DowngradeComponentAdapter} from './downgrade_component_adapter';
 import {controllerKey, getComponentName} from './util';
 
-let downgradeCount = 0;
-
 /**
  * @whatItDoes
  *
@@ -57,9 +55,6 @@ export function downgradeComponent(info: {
   /** @deprecated since v4. This parameter is no longer used */
   selectors?: string[];
 }): any /* angular.IInjectable */ {
-  const idPrefix = `NG2_UPGRADE_${downgradeCount++}_`;
-  let idCount = 0;
-
   const directiveFactory:
       angular.IAnnotatedFunction = function(
                                        $compile: angular.ICompileService,
@@ -90,10 +85,9 @@ export function downgradeComponent(info: {
             throw new Error('Expecting ComponentFactory for: ' + getComponentName(info.component));
           }
 
-          const id = idPrefix + (idCount++);
           const injectorPromise = new ParentInjectorPromise(element);
           const facade = new DowngradeComponentAdapter(
-              id, element, attrs, scope, ngModel, injector, $injector, $compile, $parse,
+              element, attrs, scope, ngModel, injector, $injector, $compile, $parse,
               componentFactory);
 
           const projectableNodes = facade.compileContents();
diff --git a/packages/upgrade/src/common/downgrade_component_adapter.ts b/packages/upgrade/src/common/downgrade_component_adapter.ts
index 1d05dc151e..ede2efa28f 100644
--- a/packages/upgrade/src/common/downgrade_component_adapter.ts
+++ b/packages/upgrade/src/common/downgrade_component_adapter.ts
@@ -26,11 +26,11 @@ export class DowngradeComponentAdapter {
   private changeDetector: ChangeDetectorRef|null = null;
 
   constructor(
-      private id: string, private element: angular.IAugmentedJQuery,
-      private attrs: angular.IAttributes, private scope: angular.IScope,
-      private ngModel: angular.INgModelController, private parentInjector: Injector,
-      private $injector: angular.IInjectorService, private $compile: angular.ICompileService,
-      private $parse: angular.IParseService, private componentFactory: ComponentFactory<any>) {
+      private element: angular.IAugmentedJQuery, private attrs: angular.IAttributes,
+      private scope: angular.IScope, private ngModel: angular.INgModelController,
+      private parentInjector: Injector, private $injector: angular.IInjectorService,
+      private $compile: angular.ICompileService, private $parse: angular.IParseService,
+      private componentFactory: ComponentFactory<any>) {
     (this.element[0] as any).id = id;
     this.componentScope = scope.$new();
   }