diff --git a/pattern_import_export/models/pattern_chunk.py b/pattern_import_export/models/pattern_chunk.py
index c1664cb4..e3fc948e 100644
--- a/pattern_import_export/models/pattern_chunk.py
+++ b/pattern_import_export/models/pattern_chunk.py
@@ -39,9 +39,8 @@ def run_import(self):
                 pattern_config={
                     "model": model,
                     "record_ids": [],
-                    "purge_one2many": (
-                        self.pattern_file_id.pattern_config_id.purge_one2many
-                    ),
+                    "purge_one2many": self.pattern_file_id.pattern_config_id.purge_one2many,
+                    "pattern_file": self.pattern_file_id,
                 }
             )
             .env[model]
diff --git a/pattern_import_export_csv/models/pattern_file.py b/pattern_import_export_csv/models/pattern_file.py
index 4ef6e449..5a366858 100644
--- a/pattern_import_export_csv/models/pattern_file.py
+++ b/pattern_import_export_csv/models/pattern_file.py
@@ -12,7 +12,7 @@ class PatternFile(models.Model):
     _inherit = "pattern.file"
 
     def _parse_data_csv(self, datafile):
-        in_file = io.StringIO(datafile.decode("utf-8"))
+        in_file = io.StringIO(datafile.decode("utf-8-sig"))
         config = self.pattern_config_id
         if config.header_format == "description_and_tech":
             # read the first line to skip it
diff --git a/pattern_import_export_custom_header/__manifest__.py b/pattern_import_export_custom_header/__manifest__.py
index 09d875aa..c11634c8 100644
--- a/pattern_import_export_custom_header/__manifest__.py
+++ b/pattern_import_export_custom_header/__manifest__.py
@@ -4,7 +4,7 @@
 
 {
     "name": "Pattern export custom header",
-    "summary": "Allow to use custom headers names in export files",
+    "summary": "Allow to use custom headers names in export or import files",
     "version": "14.0.1.0.1",
     "category": "Extra Tools",
     "website": "https://github.com/Shopinvader/pattern-import-export",
diff --git a/pattern_import_export_custom_header/models/__init__.py b/pattern_import_export_custom_header/models/__init__.py
index 9d55f4ed..872d411f 100644
--- a/pattern_import_export_custom_header/models/__init__.py
+++ b/pattern_import_export_custom_header/models/__init__.py
@@ -1 +1,2 @@
 from . import pattern_config
+from . import base
diff --git a/pattern_import_export_custom_header/models/base.py b/pattern_import_export_custom_header/models/base.py
new file mode 100644
index 00000000..487c1659
--- /dev/null
+++ b/pattern_import_export_custom_header/models/base.py
@@ -0,0 +1,20 @@
+# Copyright (C) 2023 Akretion (<http://www.akretion.com>).
+# @author Chafique Delli <chafique.delli@akretion.com>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from odoo import models
+
+
+class Base(models.AbstractModel):
+    _inherit = "base"
+
+    def _pattern_format2json(self, row):
+        config = self._context["pattern_config"]["pattern_file"].pattern_config_id
+        new_row = {
+            header.initial_header_name: row.get(header.name)
+            or header.import_default_value
+            for header in config.custom_header_ids
+        }
+        if new_row:
+            row = new_row
+        return super()._pattern_format2json(row=row)
diff --git a/pattern_import_export_custom_header/models/pattern_config.py b/pattern_import_export_custom_header/models/pattern_config.py
index f7d433cf..80fd045a 100644
--- a/pattern_import_export_custom_header/models/pattern_config.py
+++ b/pattern_import_export_custom_header/models/pattern_config.py
@@ -19,7 +19,7 @@ class PatternConfig(models.Model):
 
     def _map_with_custom_header(self, data):
         return {
-            item.name: data.get(item.initial_header_name)
+            item.name: data.get(item.initial_header_name) or item.export_default_value
             for item in self.custom_header_ids
         }
 
@@ -72,6 +72,8 @@ class PatternCustomHeader(models.Model):
     custom_name = fields.Char(string="Custom Header Name")
     initial_header_name = fields.Char(string="Initial Header Name")
     pattern_id = fields.Many2one("pattern.config", required=True)
+    import_default_value = fields.Char(string="Import default Value")
+    export_default_value = fields.Char(string="Export default Value")
 
     def _compute_name(self):
         for record in self:
diff --git a/pattern_import_export_custom_header/views/pattern_config.xml b/pattern_import_export_custom_header/views/pattern_config.xml
index 292dbf36..824e308f 100644
--- a/pattern_import_export_custom_header/views/pattern_config.xml
+++ b/pattern_import_export_custom_header/views/pattern_config.xml
@@ -30,6 +30,8 @@
                                 name="custom_name"
                                 attrs="{'required': [('initial_header_name', '=', False)]}"
                             />
+                            <field name="import_default_value" />
+                            <field name="export_default_value" />
                         </tree>
                     </field>
                 </page>