diff --git a/actions/models.md b/actions/models.md
index fcbcb43..ef3e817 100644
--- a/actions/models.md
+++ b/actions/models.md
@@ -309,3 +309,33 @@
         "error": null
     }
     ```
+
+*   **findAndReplaceInModels**
+
+    Find and replace string in existing model by model name. Customise to replace in front, back or css by setting to true/false.
+
+    *Sample request*:
+    ```json
+    {
+        "action": "findAndReplaceInModels",
+        "version": 6,
+        "params": {
+            "model": {
+                "modelName": "",
+                "findText": "text_to_replace",
+                "replaceText": "replace_with_text",
+                "front": true,
+                "back": true,
+                "css": true
+            }
+        }
+    }
+    ```
+
+    *Sample result*:
+    ```json
+    {
+        "result": 1,
+        "error": null
+    }
+    ```
\ No newline at end of file
diff --git a/plugin/__init__.py b/plugin/__init__.py
index 91c29a9..1517146 100644
--- a/plugin/__init__.py
+++ b/plugin/__init__.py
@@ -934,6 +934,36 @@ class AnkiConnect:
         models.flush()
 
 
+    @util.api()
+    def findAndReplaceInModels(self, modelName, findText, replaceText, front=True, back=True, css=True):
+        if not modelName:
+            ankiModel = self.collection().models.allNames()
+        else:
+            model = self.collection().models.byName(modelName)
+            if model is None:
+                raise Exception('model was not found: {}'.format(modelName))
+            ankiModel = [model]
+        updatedModels = 0
+        for model in ankiModel:
+            model = self.collection().models.byName(model)
+            checkForText = False
+            if css and findText in model['css']:
+                checkForText = True
+                model['css'] = model['css'].replace(findText, replaceText) 
+            for tmpls in model.get('tmpls'):
+                if front and findText in tmpls['qfmt']:
+                    checkForText = True
+                    tmpls['qfmt'] = tmpls['qfmt'].replace(findText, replaceText)
+                if back and findText in tmpls['afmt']:
+                    checkForText = True
+                    tmpls['afmt'] = tmpls['afmt'].replace(findText, replaceText)                        
+            self.collection().models.save(model, True)
+            self.collection().models.flush()
+            if checkForText:
+                updatedModels += 1
+        return updatedModels
+
+
     @util.api()
     def deckNameFromId(self, deckId):
         deck = self.collection().decks.get(deckId)
diff --git a/tests/test_models.py b/tests/test_models.py
index 550c194..20161f6 100755
--- a/tests/test_models.py
+++ b/tests/test_models.py
@@ -14,6 +14,8 @@ NEW_CSS = 'new random css'
 CARD_1_TEMPLATE = {'Front': 'field1', 'Back': 'field2'}
 NEW_CARD_1_TEMPLATE = {'Front': 'question: field1', 'Back': 'answer: field2'}
 
+TEXT_TO_REPLACE = "new random css"
+REPLACE_WITH_TEXT = "new updated css"
 
 class TestModels(unittest.TestCase):
     def runTest(self):
@@ -55,6 +57,10 @@ class TestModels(unittest.TestCase):
         templates = util.invoke('modelTemplates', modelName=MODEL_1_NAME)
         self.assertEqual({'Card 1': NEW_CARD_1_TEMPLATE}, templates)
 
+        # findAndReplaceInModels: find and replace text in all models or model by name
+        util.invoke('findAndReplaceInModels', modelName=MODEL_1_NAME, findText=TEXT_TO_REPLACE, replaceText=REPLACE_WITH_TEXT, front=True, back=True, css=True)
+        new_css = util.invoke('modelStyling', modelName=MODEL_1_NAME)
+        self.assertEqual({'css': REPLACE_WITH_TEXT}, new_css)
 
 if __name__ == '__main__':
-    unittest.main()
+    unittest.main()
\ No newline at end of file