diff --git a/src/diffusers/modular_pipelines/modular_pipeline.py b/src/diffusers/modular_pipelines/modular_pipeline.py
index c26a9c7c8a..cdb28519f4 100644
--- a/src/diffusers/modular_pipelines/modular_pipeline.py
+++ b/src/diffusers/modular_pipelines/modular_pipeline.py
@@ -248,7 +248,7 @@ class BlockState:
 
 class ModularPipelineBlocks(ConfigMixin):
     """
-    Mixin for all PipelineBlocks: PipelineBlock, AutoPipelineBlocks, SequentialPipelineBlocks
+    Base class for all Pipeline Blocks: PipelineBlock, AutoPipelineBlocks, SequentialPipelineBlocks, LoopSequentialPipelineBlocks
     """
 
     config_name = "config.json"
@@ -307,6 +307,20 @@ class ModularPipelineBlocks(ConfigMixin):
         }
 
         return block_cls(**block_kwargs)
+
+    def save_pretrained(self, save_directory, push_to_hub = False, **kwargs):
+        # TODO: factor out this logic.
+        cls_name = self.__class__.__name__
+        
+        full_mod = type(self).__module__ 
+        module = full_mod.rsplit(".", 1)[-1].replace("__dynamic__", "")
+        parent_module = self.save_pretrained.__func__.__qualname__.split(".", 1)[0]  
+        auto_map = {f"{parent_module}": f"{module}.{cls_name}"}
+        
+        self.register_to_config(auto_map=auto_map)
+        self.save_config(save_directory=save_directory, push_to_hub=push_to_hub, **kwargs)
+        config = dict(self.config)
+        self._internal_dict = FrozenDict(config)
     
     def init_pipeline(self, pretrained_model_name_or_path: Optional[Union[str, os.PathLike]] = None, component_manager: Optional[ComponentsManager] = None, collection: Optional[str] = None):
         """
@@ -532,21 +546,6 @@ class PipelineBlock(ModularPipelineBlocks):
                     if current_value is not param:  # Using identity comparison to check if object was modified
                         state.add_intermediate(param_name, param, input_param.kwargs_type)
 
-    def save_pretrained(self, save_directory, push_to_hub = False, **kwargs):
-        # TODO: factor out this logic.
-        cls_name = self.__class__.__name__
-        
-        full_mod = type(self).__module__ 
-        module = full_mod.rsplit(".", 1)[-1].replace("__dynamic__", "")
-        parent_module = self.save_pretrained.__func__.__qualname__.split(".", 1)[0]  
-        auto_map = {f"{parent_module}": f"{module}.{cls_name}"}
-        _component_names = [c.name for c in self.expected_components]
-        
-        self.register_to_config(auto_map=auto_map, _component_names=_component_names)
-        self.save_config(save_directory=save_directory, push_to_hub=push_to_hub, **kwargs)
-        config = dict(self.config)
-        self._internal_dict = FrozenDict(config)
-
 
 def combine_inputs(*named_input_lists: List[Tuple[str, List[InputParam]]]) -> List[InputParam]:
     """
@@ -2366,9 +2365,7 @@ class ModularPipeline:
         self.loader = loader
 
     def __repr__(self):
-        blocks_class = self.blocks.__class__.__name__
-        loader_class = self.loader.__class__.__name__
-        return f"ModularPipeline(blocks={blocks_class}, loader={loader_class})"
+        return f"ModularPipeline(\n  blocks={repr(self.blocks)},\n  loader={repr(self.loader)}\n)"
 
     @property
     def default_call_parameters(self) -> Dict[str, Any]: