diff --git a/Magento2/Sniffs/Legacy/DiConfigSniff.php b/Magento2/Sniffs/Legacy/DiConfigSniff.php
new file mode 100644
index 00000000..954c32e0
--- /dev/null
+++ b/Magento2/Sniffs/Legacy/DiConfigSniff.php
@@ -0,0 +1,54 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+
+namespace Magento2\Sniffs\Legacy;
+
+use PHP_CodeSniffer\Files\File;
+use PHP_CodeSniffer\Sniffs\Sniff;
+
+class DiConfigSniff implements Sniff
+{
+    private const WARNING_CODE = 'FoundObsoleteAttribute';
+
+    /**
+     * @var string[] Associative array containing the obsolete nodes and the message to display when they are found.
+     */
+    private $obsoleteDiNodes = [
+        '<param' => 'The <param> node is obsolete. Instead, use the <argument name="..." xsi:type="...">',
+        '<instance' => 'The <instance> node is obsolete. Instead, use the <argument name="..." xsi:type="object">',
+        '<array' => 'The <array> node is obsolete. Instead, use the <argument name="..." xsi:type="array">',
+        '<item key=' => 'The <item key="..."> node is obsolete. Instead, use the <item name="..." xsi:type="...">',
+        '<value' => 'The <value> node is obsolete. Instead, provide the actual value as a text literal.'
+    ];
+
+    /**
+     * @inheritDoc
+     */
+    public function register(): array
+    {
+        return [
+            T_INLINE_HTML
+        ];
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function process(File $phpcsFile, $stackPtr)
+    {
+        $lineContent = $phpcsFile->getTokensAsString($stackPtr, 1);
+
+        foreach ($this->obsoleteDiNodes as $element => $message) {
+            if (strpos($lineContent, $element) !== false) {
+                $phpcsFile->addWarning(
+                    $message,
+                    $stackPtr,
+                    self::WARNING_CODE
+                );
+            }
+        }
+    }
+}
diff --git a/Magento2/Tests/Legacy/DiConfigUnitTest.php b/Magento2/Tests/Legacy/DiConfigUnitTest.php
new file mode 100644
index 00000000..d5dad883
--- /dev/null
+++ b/Magento2/Tests/Legacy/DiConfigUnitTest.php
@@ -0,0 +1,33 @@
+<?php
+/**
+ * Copyright © Magento. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+namespace Magento2\Tests\Legacy;
+
+use PHP_CodeSniffer\Tests\Standards\AbstractSniffUnitTest;
+
+class DiConfigUnitTest extends AbstractSniffUnitTest
+{
+    /**
+     * @inheritdoc
+     */
+    public function getErrorList(): array
+    {
+        return [];
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function getWarningList(): array
+    {
+        return [
+            12 => 1,
+            16 => 1,
+            17 => 1,
+            18 => 1,
+            19 => 1
+        ];
+    }
+}
diff --git a/Magento2/Tests/Legacy/DiConfigUnitTest.xml b/Magento2/Tests/Legacy/DiConfigUnitTest.xml
new file mode 100644
index 00000000..048e31b4
--- /dev/null
+++ b/Magento2/Tests/Legacy/DiConfigUnitTest.xml
@@ -0,0 +1,23 @@
+<?xml version="1.0"?>
+<!--
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+-->
+<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
+    <type>
+        <arguments>
+            <argument name="prices" xsi:type="array">
+                <item key="regular_price" xsi:type="string">Magento\Catalog\Pricing\Price\RegularPrice</item>
+            </argument>
+        </arguments>
+    </type>
+    <instance>
+        <array key="params">
+            <param name="default_value" new_attribute="0">
+                <value new_attribute="5">scalar5</value>
+            </param>
+        </array>
+    </instance>
+</config>
diff --git a/Magento2/ruleset.xml b/Magento2/ruleset.xml
index 204946d0..7b1e78f7 100644
--- a/Magento2/ruleset.xml
+++ b/Magento2/ruleset.xml
@@ -3,7 +3,7 @@
     <description>Magento Coding Standard</description>
 
     <!-- File extensions to be checked. -->
-    <arg name="extensions" value="php,phtml,graphqls/GraphQL,less/CSS,html/PHP"/>
+    <arg name="extensions" value="php,phtml,graphqls/GraphQL,less/CSS,html/PHP,xml"/>
 
     <!-- Severity 10 errors: Critical code issues. -->
     <rule ref="Generic.Functions.CallTimePassByReference">
@@ -223,6 +223,11 @@
         <severity>8</severity>
         <type>warning</type>
     </rule>
+    <rule ref="Magento2.Legacy.DiConfig">
+        <include-pattern>*\/di.xml$</include-pattern>
+        <severity>8</severity>
+        <type>warning</type>
+    </rule>
 
     <!-- Severity 7 warnings: General code issues. -->
     <rule ref="Generic.Arrays.DisallowLongArraySyntax">
@@ -258,6 +263,7 @@
         <type>warning</type>
     </rule>
     <rule ref="Generic.PHP.DisallowShortOpenTag">
+        <exclude-pattern>*\.xml$</exclude-pattern>
         <severity>7</severity>
         <type>warning</type>
     </rule>