diff --git a/onnxruntime/core/providers/tensorrt/tensorrt_provider_factory.cc b/onnxruntime/core/providers/tensorrt/tensorrt_provider_factory.cc
index 7f6a353706fb6..9f80fae676029 100644
--- a/onnxruntime/core/providers/tensorrt/tensorrt_provider_factory.cc
+++ b/onnxruntime/core/providers/tensorrt/tensorrt_provider_factory.cc
@@ -113,7 +113,7 @@ struct Tensorrt_Provider : Provider {
     info.ep_context_file_path = options.trt_ep_context_file_path == nullptr ? "" : options.trt_ep_context_file_path;
     info.ep_context_embed_mode = options.trt_ep_context_embed_mode;
     info.engine_cache_prefix = options.trt_engine_cache_prefix == nullptr ? "" : options.trt_engine_cache_prefix;
-    
+
     info.custom_op_domain_list = options.custom_op_domain_list;
 
     return std::make_shared<TensorrtProviderFactory>(info);
diff --git a/onnxruntime/core/session/provider_bridge_ort.cc b/onnxruntime/core/session/provider_bridge_ort.cc
index 93ee472e2d8b1..1d7807d04fe52 100644
--- a/onnxruntime/core/session/provider_bridge_ort.cc
+++ b/onnxruntime/core/session/provider_bridge_ort.cc
@@ -1693,8 +1693,10 @@ void AddTensorRTCustomOpDomainToSessionOption(OrtSessionOptions* options, OrtTen
   for (auto ptr : custom_op_domains) {
     if (!is_already_in_domains(ptr->domain_, options->custom_op_domains_)) {
       options->custom_op_domains_.push_back(ptr);
+      // The OrtCustomOpDomains objects created by TRT EP's GetTensorRTCustomOpDomainList() should be released once session is finished.
+      // TRT EP needs to keep all the pointers OrtCustomOpDomain obejcts and releases them upon TRT EP destruction.
       if (tensorrt_options) {
-        tensorrt_options->custom_op_domain_list.push_back(ptr);  // TensorRT EP should keep all the pointers to OrtCustomOpDomain obejcts for the purpose of releasing them at EP destruction
+        tensorrt_options->custom_op_domain_list.push_back(ptr);
       }
     } else {
       LOGS_DEFAULT(WARNING) << "The custom op domain name " << ptr->domain_ << " is already in session option.";
@@ -1716,17 +1718,9 @@ ORT_API_STATUS_IMPL(OrtSessionOptionsAppendExecutionProvider_Dnnl, _In_ OrtSessi
 
 ORT_API_STATUS_IMPL(OrtSessionOptionsAppendExecutionProvider_Tensorrt, _In_ OrtSessionOptions* options, int device_id) {
   API_IMPL_BEGIN
-  auto factory = onnxruntime::TensorrtProviderFactoryCreator::Create(device_id);
-  if (!factory) {
-    return OrtApis::CreateStatus(ORT_FAIL, "OrtSessionOptionsAppendExecutionProvider_Tensorrt: Failed to load shared library");
-  }
-
-  options->provider_factories.push_back(factory);
-
-  std::string extra_plugin_lib_paths = onnxruntime::Env::Default().GetEnvironmentVar("trt_extra_plugin_lib_paths");
-  AddTensorRTCustomOpDomainToSessionOption(options, nullptr, extra_plugin_lib_paths);
-
-  return nullptr;
+  OrtTensorRTProviderOptionsV2 tensorrt_options;
+  tensorrt_options.device_id = device_id;
+  return OrtApis::SessionOptionsAppendExecutionProvider_TensorRT_V2(options, &tensorrt_options);
   API_IMPL_END
 }
 
@@ -1744,32 +1738,8 @@ ORT_API_STATUS_IMPL(OrtSessionOptionsAppendExecutionProvider_MIGraphX, _In_ OrtS
 
 ORT_API_STATUS_IMPL(OrtApis::SessionOptionsAppendExecutionProvider_TensorRT, _In_ OrtSessionOptions* options, _In_ const OrtTensorRTProviderOptions* tensorrt_options) {
   API_IMPL_BEGIN
-
-  std::shared_ptr<onnxruntime::IExecutionProviderFactory> factory;
-
   OrtTensorRTProviderOptionsV2 trt_options_converted = onnxruntime::OrtTensorRTProviderOptionsToOrtTensorRTProviderOptionsV2(tensorrt_options);
-  trt_options_converted.custom_op_domain_list.clear();
-  AddTensorRTCustomOpDomainToSessionOption(options, &trt_options_converted, "");
-
-#if !defined(ORT_MINIMAL_BUILD) && defined(USE_TENSORRT)
-  auto ep_context_cache_enabled_from_sess_options = (options->value).config_options.GetConfigOrDefault(kOrtSessionOptionEpContextEnable, "0") != "0";
-  // If EP context configs are provided in session options, we need to propagate them to provider options
-  if (ep_context_cache_enabled_from_sess_options) {
-    onnxruntime::UpdateOrtTensorRTProviderOptionsV2FromSessionOptionsConfigs(options, &trt_options_converted);
-    factory = onnxruntime::TensorrtProviderFactoryCreator::Create(&trt_options_converted);
-  }
-  factory = onnxruntime::TensorrtProviderFactoryCreator::Create(&trt_options_converted);
-#else
-  factory = onnxruntime::TensorrtProviderFactoryCreator::Create(&trt_options_converted);
-#endif
-
-  if (!factory) {
-    return OrtApis::CreateStatus(ORT_FAIL, "SessionOptionsAppendExecutionProvider_Tensorrt: Failed to load shared library");
-  }
-
-  options->provider_factories.push_back(factory);
-
-  return nullptr;
+  return OrtApis::SessionOptionsAppendExecutionProvider_TensorRT_V2(options, &trt_options_converted);
   API_IMPL_END
 }
 
diff --git a/onnxruntime/python/onnxruntime_pybind_state.cc b/onnxruntime/python/onnxruntime_pybind_state.cc
index f7ed5520727db..72df0b9006bf9 100644
--- a/onnxruntime/python/onnxruntime_pybind_state.cc
+++ b/onnxruntime/python/onnxruntime_pybind_state.cc
@@ -745,6 +745,13 @@ std::unique_ptr<IExecutionProvider> CreateExecutionProviderInstance(
             ORT_THROW("Invalid TensorRT EP option: ", option.first);
           }
         }
+        // The OrtCustomOpDomains objects created by TRT EP's GetTensorRTCustomOpDomainList() should be released once session is finished.
+        // TRT EP needs to keep all the pointers OrtCustomOpDomain obejcts and releases them upon TRT EP destruction.
+        for (auto ptr : session_options.custom_op_domains_) {
+          if (ptr->domain_ == "trt.plugins") {
+            params->custom_op_domain_list.push_back(ptr);
+          }
+        }
         if (std::shared_ptr<IExecutionProviderFactory> tensorrt_provider_factory = onnxruntime::TensorrtProviderFactoryCreator::Create(&params)) {
           return tensorrt_provider_factory->CreateProvider();
         }