diff --git a/docs/data/data-grid/getting-started/getting-started.md b/docs/data/data-grid/getting-started/getting-started.md
index 696a9da03c95..f3820ef2c15e 100644
--- a/docs/data/data-grid/getting-started/getting-started.md
+++ b/docs/data/data-grid/getting-started/getting-started.md
@@ -138,7 +138,6 @@ In order to benefit from the [CSS overrides](/material-ui/customization/theme-co
 Internally, it uses module augmentation to extend the default theme structure.
 
 ```tsx
-// When using TypeScript 4.x and above
 import type {} from '@mui/x-data-grid/themeAugmentation';
 import type {} from '@mui/x-data-grid-pro/themeAugmentation';
 import type {} from '@mui/x-data-grid-premium/themeAugmentation';
diff --git a/docs/data/data-grid/style/style.md b/docs/data/data-grid/style/style.md
index 71ee02e6f58e..a08114ae6385 100644
--- a/docs/data/data-grid/style/style.md
+++ b/docs/data/data-grid/style/style.md
@@ -122,6 +122,7 @@ By default, the Data Grid uses the Material UI `theme.palette.background.defaul
 
 ```tsx
 import { createTheme } from '@mui/material/styles';
+import type {} from '@mui/x-data-grid/themeAugmentation';
 
 const theme = createTheme({
   mixins: {
diff --git a/docs/data/date-pickers/base-concepts/base-concepts.md b/docs/data/date-pickers/base-concepts/base-concepts.md
index 636aa7f934ca..82590c92d376 100644
--- a/docs/data/date-pickers/base-concepts/base-concepts.md
+++ b/docs/data/date-pickers/base-concepts/base-concepts.md
@@ -155,12 +155,8 @@ To benefit from the [CSS overrides](/material-ui/customization/theme-components/
 Internally, it uses module augmentation to extend the default theme structure.
 
 ```tsx
-// When using TypeScript 4.x and above
 import type {} from '@mui/x-date-pickers/themeAugmentation';
 import type {} from '@mui/x-date-pickers-pro/themeAugmentation';
-// When using TypeScript 3.x and below
-import '@mui/x-date-pickers/themeAugmentation';
-import '@mui/x-date-pickers-pro/themeAugmentation';
 
 const theme = createTheme({
   components: {
diff --git a/docs/data/tree-view/getting-started/getting-started.md b/docs/data/tree-view/getting-started/getting-started.md
index 75eb6936f8b0..79dc191bdc92 100644
--- a/docs/data/tree-view/getting-started/getting-started.md
+++ b/docs/data/tree-view/getting-started/getting-started.md
@@ -92,10 +92,7 @@ In order to benefit from the [CSS overrides](/material-ui/customization/theme-co
 Internally, it uses module augmentation to extend the default theme structure.
 
 ```tsx
-// When using TypeScript 4.x and above
 import type {} from '@mui/x-tree-view/themeAugmentation';
-// When using TypeScript 3.x and below
-import '@mui/x-tree-view/themeAugmentation';
 
 const theme = createTheme({
   components: {