diff --git a/erpnext/manufacturing/doctype/bom/bom.py b/erpnext/manufacturing/doctype/bom/bom.py
index 95595f26c93..36854b2d052 100644
--- a/erpnext/manufacturing/doctype/bom/bom.py
+++ b/erpnext/manufacturing/doctype/bom/bom.py
@@ -123,13 +123,19 @@ class BOM(Document):
 	def update_cost(self):
 		if self.docstatus == 2:
 			return
-
+		
+		items_rate = frappe._dict()
 		for d in self.get("items"):
 			rate = self.get_bom_material_detail({'item_code': d.item_code, 'bom_no': d.bom_no,
 				'qty': d.qty})["rate"]
 			if rate:
 				d.rate = rate
-
+				items_rate.setdefault(d.item_code, d.rate)
+				
+		for e in self.get("exploded_items"):
+			if items_rate.get(e.item_code):
+				e.rate = items_rate.get(e.item_code)
+			
 		if self.docstatus == 1:
 			self.flags.ignore_validate_update_after_submit = True
 			self.calculate_cost()