diff --git a/core/io/resource_importer.h b/core/io/resource_importer.h
index 221f38494b..3ca8f7c05d 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 28614b6631..e5f3010366 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 faf0f336c0..9d299bc31a 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 fe757dc2a3..daeab2ae03 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 8963c8d918..30564bf0fe 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 d31cd03736..48f036ff13 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 c6b05eb043..9c83719ed1 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 de89e6b76f..7c7a16cf92 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 1490ab30d5..dd395009c1 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 065351c361..6b30a3cd6e 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 26495eed8d..d8b5bc2d14 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 aefc967989..b28dea36d6 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 6d74c4e2f9..6c87cd0abb 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 0f2b10424c..e4ad9ac230 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 47af37ba41..2253756554 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 2df44deaea..037756328f 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 59ae3378a0..f378b80694 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();
 };