diff --git a/addons/base_import/models/base_import.py b/addons/base_import/models/base_import.py
index dbff99fab88..748b37e86af 100644
--- a/addons/base_import/models/base_import.py
+++ b/addons/base_import/models/base_import.py
@@ -497,7 +497,6 @@ class Import(models.TransientModel):
                 'headers_type': header_types or False,
                 'preview': preview,
                 'options': options,
-                'advanced_mode': any([len(models.fix_import_export_id_paths(col)) > 1 for col in headers or []]),
                 'debug': self.user_has_groups('base.group_no_one'),
             }
         except Exception as error:
diff --git a/addons/base_import/static/src/js/import_action.js b/addons/base_import/static/src/js/import_action.js
index 1872dec6205..153e41ed632 100644
--- a/addons/base_import/static/src/js/import_action.js
+++ b/addons/base_import/static/src/js/import_action.js
@@ -301,7 +301,6 @@ var DataImport = Widget.extend(ControlPanelMixin, {
         this.$buttons.filter('.o_import_button').add(this.$('.oe_import_file_reload'))
                 .prop('disabled', false);
         this.$el.addClass('oe_import_preview');
-        this.$('input.oe_import_advanced_mode').prop('checked', result.advanced_mode);
         this.$('.oe_import_grid').html(QWeb.render('ImportView.preview', result));
 
         if (result.headers.length === 1) {
diff --git a/addons/base_import/static/src/xml/base_import.xml b/addons/base_import/static/src/xml/base_import.xml
index c9c4e8a5037..7a9881849ac 100644
--- a/addons/base_import/static/src/xml/base_import.xml
+++ b/addons/base_import/static/src/xml/base_import.xml
@@ -76,7 +76,7 @@
                        id="oe_import_has_header" checked="checked"/>
                 <label for="oe_import_has_header">The first row
                  contains the label of the column</label>
-                <input type="checkbox" class="oe_import_advanced_mode" disabled="disabled"
+                <input type="checkbox" class="oe_import_advanced_mode" checked="checked"
                        id="oe_import_advanced_mode"/>
                 <label for="oe_import_advanced_mode">Show fields of relation fields (advanced)</label>
                 <p class="oe_import_noheaders">If the file contains
diff --git a/addons/base_import/tests/test_base_import.py b/addons/base_import/tests/test_base_import.py
index 55f3300da91..df2d18a3feb 100644
--- a/addons/base_import/tests/test_base_import.py
+++ b/addons/base_import/tests/test_base_import.py
@@ -258,7 +258,7 @@ class TestPreview(TransactionCase):
             ['qux', '5', '6'],
         ])
         # Ensure we only have the response fields we expect
-        self.assertItemsEqual(list(result), ['matches', 'headers', 'fields', 'preview', 'headers_type', 'options', 'advanced_mode', 'debug'])
+        self.assertItemsEqual(list(result), ['matches', 'headers', 'fields', 'preview', 'headers_type', 'options', 'debug'])
 
     @unittest.skipUnless(can_import('xlrd'), "XLRD module not available")
     def test_xls_success(self):
@@ -288,7 +288,7 @@ class TestPreview(TransactionCase):
             ['qux', '5', '6'],
         ])
         # Ensure we only have the response fields we expect
-        self.assertItemsEqual(list(result), ['matches', 'headers', 'fields', 'preview', 'headers_type', 'options', 'advanced_mode', 'debug'])
+        self.assertItemsEqual(list(result), ['matches', 'headers', 'fields', 'preview', 'headers_type', 'options', 'debug'])
 
     @unittest.skipUnless(can_import('xlrd.xlsx'), "XLRD/XLSX not available")
     def test_xlsx_success(self):
@@ -318,7 +318,7 @@ class TestPreview(TransactionCase):
             ['qux', '5', '6'],
         ])
         # Ensure we only have the response fields we expect
-        self.assertItemsEqual(list(result), ['matches', 'headers', 'fields', 'preview', 'headers_type', 'options','advanced_mode', 'debug'])
+        self.assertItemsEqual(list(result), ['matches', 'headers', 'fields', 'preview', 'headers_type', 'options', 'debug'])
 
     @unittest.skipUnless(can_import('odf'), "ODFPY not available")
     def test_ods_success(self):
@@ -348,7 +348,7 @@ class TestPreview(TransactionCase):
             ['aux', '5', '6'],
         ])
         # Ensure we only have the response fields we expect
-        self.assertItemsEqual(list(result), ['matches', 'headers', 'fields', 'preview', 'headers_type', 'options', 'advanced_mode', 'debug'])
+        self.assertItemsEqual(list(result), ['matches', 'headers', 'fields', 'preview', 'headers_type', 'options', 'debug'])
 
 
 class test_convert_import_data(TransactionCase):