diff --git a/core/io/resource_importer.h b/core/io/resource_importer.h
index 221f38494b3..3ca8f7c05d0 100644
--- a/core/io/resource_importer.h
+++ b/core/io/resource_importer.h
@@ -148,7 +148,7 @@ public:
 	virtual String get_option_group_file() const { return String(); }
 
 	virtual Error import(const String &p_source_file, const String &p_save_path, const HashMap<StringName, Variant> &p_options, List<String> *r_platform_variants, List<String> *r_gen_files = nullptr, Variant *r_metadata = nullptr) = 0;
-	virtual bool can_import_threaded() const { return true; }
+	virtual bool can_import_threaded() const { return false; }
 	virtual void import_threaded_begin() {}
 	virtual void import_threaded_end() {}
 
diff --git a/doc/classes/EditorImportPlugin.xml b/doc/classes/EditorImportPlugin.xml
index 28614b66318..e5f30103661 100644
--- a/doc/classes/EditorImportPlugin.xml
+++ b/doc/classes/EditorImportPlugin.xml
@@ -124,7 +124,8 @@
 			<return type="bool" />
 			<description>
 				Tells whether this importer can be run in parallel on threads, or, on the contrary, it's only safe for the editor to call it from the main thread, for one file at a time.
-				If this method is not overridden, it will return [code]true[/code] by default (i.e., safe for parallel importing).
+				If this method is not overridden, it will return [code]false[/code] by default.
+				If this importer's implementation is thread-safe and can be run in parallel, override this with [code]true[/code] to optimize for concurrency.
 			</description>
 		</method>
 		<method name="_get_import_options" qualifiers="virtual const">
diff --git a/editor/import/3d/resource_importer_obj.h b/editor/import/3d/resource_importer_obj.h
index faf0f336c00..9d299bc31a1 100644
--- a/editor/import/3d/resource_importer_obj.h
+++ b/editor/import/3d/resource_importer_obj.h
@@ -63,9 +63,6 @@ public:
 
 	virtual Error import(const String &p_source_file, const String &p_save_path, const HashMap<StringName, Variant> &p_options, List<String> *r_platform_variants, List<String> *r_gen_files = nullptr, Variant *r_metadata = nullptr) override;
 
-	// Threaded import can currently cause deadlocks, see GH-48265.
-	virtual bool can_import_threaded() const override { return false; }
-
 	ResourceImporterOBJ();
 };
 
diff --git a/editor/import/3d/resource_importer_scene.h b/editor/import/3d/resource_importer_scene.h
index fe757dc2a3a..daeab2ae03c 100644
--- a/editor/import/3d/resource_importer_scene.h
+++ b/editor/import/3d/resource_importer_scene.h
@@ -304,8 +304,6 @@ public:
 	virtual bool has_advanced_options() const override;
 	virtual void show_advanced_options(const String &p_path) override;
 
-	virtual bool can_import_threaded() const override { return false; }
-
 	ResourceImporterScene(const String &p_scene_import_type = "PackedScene", bool p_singleton = false);
 	~ResourceImporterScene();
 
diff --git a/editor/import/resource_importer_bitmask.h b/editor/import/resource_importer_bitmask.h
index 8963c8d9189..30564bf0fed 100644
--- a/editor/import/resource_importer_bitmask.h
+++ b/editor/import/resource_importer_bitmask.h
@@ -50,6 +50,8 @@ public:
 	virtual bool get_option_visibility(const String &p_path, const String &p_option, const HashMap<StringName, Variant> &p_options) const override;
 	virtual Error import(const String &p_source_file, const String &p_save_path, const HashMap<StringName, Variant> &p_options, List<String> *r_platform_variants, List<String> *r_gen_files = nullptr, Variant *r_metadata = nullptr) override;
 
+	virtual bool can_import_threaded() const override { return true; }
+
 	ResourceImporterBitMap();
 	~ResourceImporterBitMap();
 };
diff --git a/editor/import/resource_importer_bmfont.h b/editor/import/resource_importer_bmfont.h
index d31cd03736e..48f036ff135 100644
--- a/editor/import/resource_importer_bmfont.h
+++ b/editor/import/resource_importer_bmfont.h
@@ -50,6 +50,8 @@ public:
 
 	virtual Error import(const String &p_source_file, const String &p_save_path, const HashMap<StringName, Variant> &p_options, List<String> *r_platform_variants, List<String> *r_gen_files = nullptr, Variant *r_metadata = nullptr) override;
 
+	virtual bool can_import_threaded() const override { return true; }
+
 	ResourceImporterBMFont();
 };
 
diff --git a/editor/import/resource_importer_csv_translation.h b/editor/import/resource_importer_csv_translation.h
index c6b05eb0431..9c83719ed1d 100644
--- a/editor/import/resource_importer_csv_translation.h
+++ b/editor/import/resource_importer_csv_translation.h
@@ -51,6 +51,8 @@ public:
 
 	virtual Error import(const String &p_source_file, const String &p_save_path, const HashMap<StringName, Variant> &p_options, List<String> *r_platform_variants, List<String> *r_gen_files = nullptr, Variant *r_metadata = nullptr) override;
 
+	virtual bool can_import_threaded() const override { return true; }
+
 	ResourceImporterCSVTranslation();
 };
 
diff --git a/editor/import/resource_importer_dynamic_font.h b/editor/import/resource_importer_dynamic_font.h
index de89e6b76f4..7c7a16cf928 100644
--- a/editor/import/resource_importer_dynamic_font.h
+++ b/editor/import/resource_importer_dynamic_font.h
@@ -60,6 +60,8 @@ public:
 
 	virtual Error import(const String &p_source_file, const String &p_save_path, const HashMap<StringName, Variant> &p_options, List<String> *r_platform_variants, List<String> *r_gen_files = nullptr, Variant *r_metadata = nullptr) override;
 
+	virtual bool can_import_threaded() const override { return true; }
+
 	ResourceImporterDynamicFont();
 };
 
diff --git a/editor/import/resource_importer_image.h b/editor/import/resource_importer_image.h
index 1490ab30d5c..dd395009c16 100644
--- a/editor/import/resource_importer_image.h
+++ b/editor/import/resource_importer_image.h
@@ -52,6 +52,8 @@ public:
 
 	virtual Error import(const String &p_source_file, const String &p_save_path, const HashMap<StringName, Variant> &p_options, List<String> *r_platform_variants, List<String> *r_gen_files = nullptr, Variant *r_metadata = nullptr) override;
 
+	virtual bool can_import_threaded() const override { return true; }
+
 	ResourceImporterImage();
 };
 
diff --git a/editor/import/resource_importer_imagefont.h b/editor/import/resource_importer_imagefont.h
index 065351c3614..6b30a3cd6ea 100644
--- a/editor/import/resource_importer_imagefont.h
+++ b/editor/import/resource_importer_imagefont.h
@@ -50,6 +50,8 @@ public:
 
 	virtual Error import(const String &p_source_file, const String &p_save_path, const HashMap<StringName, Variant> &p_options, List<String> *r_platform_variants, List<String> *r_gen_files = nullptr, Variant *r_metadata = nullptr) override;
 
+	virtual bool can_import_threaded() const override { return true; }
+
 	ResourceImporterImageFont();
 };
 
diff --git a/editor/import/resource_importer_layered_texture.h b/editor/import/resource_importer_layered_texture.h
index 26495eed8d7..d8b5bc2d14c 100644
--- a/editor/import/resource_importer_layered_texture.h
+++ b/editor/import/resource_importer_layered_texture.h
@@ -117,6 +117,8 @@ public:
 	virtual bool are_import_settings_valid(const String &p_path, const Dictionary &p_meta) const override;
 	virtual String get_import_settings_string() const override;
 
+	virtual bool can_import_threaded() const override { return true; }
+
 	void set_mode(Mode p_mode) { mode = p_mode; }
 
 	ResourceImporterLayeredTexture(bool p_singleton = false);
diff --git a/editor/import/resource_importer_shader_file.h b/editor/import/resource_importer_shader_file.h
index aefc967989c..b28dea36d6a 100644
--- a/editor/import/resource_importer_shader_file.h
+++ b/editor/import/resource_importer_shader_file.h
@@ -51,6 +51,8 @@ public:
 
 	virtual Error import(const String &p_source_file, const String &p_save_path, const HashMap<StringName, Variant> &p_options, List<String> *r_platform_variants, List<String> *r_gen_files = nullptr, Variant *r_metadata = nullptr) override;
 
+	virtual bool can_import_threaded() const override { return true; }
+
 	ResourceImporterShaderFile();
 };
 
diff --git a/editor/import/resource_importer_texture.h b/editor/import/resource_importer_texture.h
index 6d74c4e2f93..6c87cd0abb7 100644
--- a/editor/import/resource_importer_texture.h
+++ b/editor/import/resource_importer_texture.h
@@ -102,6 +102,8 @@ public:
 
 	virtual Error import(const String &p_source_file, const String &p_save_path, const HashMap<StringName, Variant> &p_options, List<String> *r_platform_variants, List<String> *r_gen_files = nullptr, Variant *r_metadata = nullptr) override;
 
+	virtual bool can_import_threaded() const override { return true; }
+
 	void update_imports();
 
 	virtual bool are_import_settings_valid(const String &p_path, const Dictionary &p_meta) const override;
diff --git a/editor/import/resource_importer_texture_atlas.h b/editor/import/resource_importer_texture_atlas.h
index 0f2b10424c7..e4ad9ac2308 100644
--- a/editor/import/resource_importer_texture_atlas.h
+++ b/editor/import/resource_importer_texture_atlas.h
@@ -67,6 +67,8 @@ public:
 	virtual Error import(const String &p_source_file, const String &p_save_path, const HashMap<StringName, Variant> &p_options, List<String> *r_platform_variants, List<String> *r_gen_files = nullptr, Variant *r_metadata = nullptr) override;
 	virtual Error import_group_file(const String &p_group_file, const HashMap<String, HashMap<StringName, Variant>> &p_source_file_options, const HashMap<String, String> &p_base_paths) override;
 
+	virtual bool can_import_threaded() const override { return true; }
+
 	ResourceImporterTextureAtlas();
 };
 
diff --git a/editor/import/resource_importer_wav.h b/editor/import/resource_importer_wav.h
index 47af37ba41d..22537565545 100644
--- a/editor/import/resource_importer_wav.h
+++ b/editor/import/resource_importer_wav.h
@@ -142,6 +142,8 @@ public:
 
 	virtual Error import(const String &p_source_file, const String &p_save_path, const HashMap<StringName, Variant> &p_options, List<String> *r_platform_variants, List<String> *r_gen_files = nullptr, Variant *r_metadata = nullptr) override;
 
+	virtual bool can_import_threaded() const override { return true; }
+
 	ResourceImporterWAV();
 };
 
diff --git a/modules/minimp3/resource_importer_mp3.h b/modules/minimp3/resource_importer_mp3.h
index 2df44deaea9..037756328fa 100644
--- a/modules/minimp3/resource_importer_mp3.h
+++ b/modules/minimp3/resource_importer_mp3.h
@@ -59,6 +59,8 @@ public:
 
 	virtual Error import(const String &p_source_file, const String &p_save_path, const HashMap<StringName, Variant> &p_options, List<String> *r_platform_variants, List<String> *r_gen_files = nullptr, Variant *r_metadata = nullptr) override;
 
+	virtual bool can_import_threaded() const override { return true; }
+
 	ResourceImporterMP3();
 };
 
diff --git a/modules/vorbis/resource_importer_ogg_vorbis.h b/modules/vorbis/resource_importer_ogg_vorbis.h
index 59ae3378a01..f378b806948 100644
--- a/modules/vorbis/resource_importer_ogg_vorbis.h
+++ b/modules/vorbis/resource_importer_ogg_vorbis.h
@@ -65,6 +65,8 @@ public:
 
 	virtual Error import(const String &p_source_file, const String &p_save_path, const HashMap<StringName, Variant> &p_options, List<String> *r_platform_variants, List<String> *r_gen_files = nullptr, Variant *r_metadata = nullptr) override;
 
+	virtual bool can_import_threaded() const override { return true; }
+
 	ResourceImporterOggVorbis();
 };