diff --git a/modules/openapi-generator/src/main/resources/jmeter-client/api.mustache b/modules/openapi-generator/src/main/resources/jmeter-client/api.mustache
index d421423b0617..df7146130eee 100644
--- a/modules/openapi-generator/src/main/resources/jmeter-client/api.mustache
+++ b/modules/openapi-generator/src/main/resources/jmeter-client/api.mustache
@@ -85,7 +85,15 @@
             <elementProp name="" elementType="Header">
               <stringProp name="Header.name">{{paramName}}</stringProp>
               <stringProp name="Header.value">${__RandomString(10,qwertyuiopasdfghjklzxcvbnm)}</stringProp>
-            </elementProp>{{/headerParams}}
+            </elementProp>{{/headerParams}}{{#consumes.0}}
+            <elementProp name="" elementType="Header">
+              <stringProp name="Header.name">Content-Type</stringProp>
+              <stringProp name="Header.value">{{{mediaType}}}</stringProp>
+            </elementProp>{{/consumes.0}}{{#produces.0}}
+            <elementProp name="" elementType="Header">
+              <stringProp name="Header.name">accept</stringProp>
+              <stringProp name="Header.value">{{{mediaType}}}</stringProp>
+            </elementProp>{{/produces.0}}
           </collectionProp>
         </HeaderManager>
         <hashTree/>
diff --git a/samples/client/petstore/jmeter/PetApi.csv b/samples/client/petstore/jmeter/PetApi.csv
index 2ab795b50f75..29b09a1715de 100644
--- a/samples/client/petstore/jmeter/PetApi.csv
+++ b/samples/client/petstore/jmeter/PetApi.csv
@@ -1,2 +1,2 @@
-testCase,httpStatusCode,pet,petId,apiKey,status,tags,petId,pet,petId,name,status,petId,additionalMetadata,file
+testCase,httpStatusCode,body,petId,apiKey,status,tags,petId,body,petId,name,status,petId,additionalMetadata,file
 Success,200,0,0,0,0,0,0,0,0,0,0,0,0,0
\ No newline at end of file
diff --git a/samples/client/petstore/jmeter/PetApi.jmx b/samples/client/petstore/jmeter/PetApi.jmx
index 8e36592e32c5..ed22d0526b83 100644
--- a/samples/client/petstore/jmeter/PetApi.jmx
+++ b/samples/client/petstore/jmeter/PetApi.jmx
@@ -117,6 +117,10 @@
       <hashTree>
         <HeaderManager guiclass="HeaderPanel" testclass="HeaderManager" testname="HTTP Header Manager" enabled="true">
           <collectionProp name="HeaderManager.headers">
+            <elementProp name="" elementType="Header">
+              <stringProp name="Header.name">Content-Type</stringProp>
+              <stringProp name="Header.value">application/json</stringProp>
+            </elementProp>
           </collectionProp>
         </HeaderManager>
         <hashTree/>
@@ -253,6 +257,10 @@
       <hashTree>
         <HeaderManager guiclass="HeaderPanel" testclass="HeaderManager" testname="HTTP Header Manager" enabled="true">
           <collectionProp name="HeaderManager.headers">
+            <elementProp name="" elementType="Header">
+              <stringProp name="Header.name">accept</stringProp>
+              <stringProp name="Header.value">application/xml</stringProp>
+            </elementProp>
           </collectionProp>
         </HeaderManager>
         <hashTree/>
@@ -326,6 +334,10 @@
       <hashTree>
         <HeaderManager guiclass="HeaderPanel" testclass="HeaderManager" testname="HTTP Header Manager" enabled="true">
           <collectionProp name="HeaderManager.headers">
+            <elementProp name="" elementType="Header">
+              <stringProp name="Header.name">accept</stringProp>
+              <stringProp name="Header.value">application/xml</stringProp>
+            </elementProp>
           </collectionProp>
         </HeaderManager>
         <hashTree/>
@@ -399,6 +411,10 @@
       <hashTree>
         <HeaderManager guiclass="HeaderPanel" testclass="HeaderManager" testname="HTTP Header Manager" enabled="true">
           <collectionProp name="HeaderManager.headers">
+            <elementProp name="" elementType="Header">
+              <stringProp name="Header.name">accept</stringProp>
+              <stringProp name="Header.value">application/xml</stringProp>
+            </elementProp>
           </collectionProp>
         </HeaderManager>
         <hashTree/>
@@ -465,6 +481,10 @@
       <hashTree>
         <HeaderManager guiclass="HeaderPanel" testclass="HeaderManager" testname="HTTP Header Manager" enabled="true">
           <collectionProp name="HeaderManager.headers">
+            <elementProp name="" elementType="Header">
+              <stringProp name="Header.name">Content-Type</stringProp>
+              <stringProp name="Header.value">application/json</stringProp>
+            </elementProp>
           </collectionProp>
         </HeaderManager>
         <hashTree/>
@@ -531,6 +551,10 @@
       <hashTree>
         <HeaderManager guiclass="HeaderPanel" testclass="HeaderManager" testname="HTTP Header Manager" enabled="true">
           <collectionProp name="HeaderManager.headers">
+            <elementProp name="" elementType="Header">
+              <stringProp name="Header.name">Content-Type</stringProp>
+              <stringProp name="Header.value">application/x-www-form-urlencoded</stringProp>
+            </elementProp>
           </collectionProp>
         </HeaderManager>
         <hashTree/>
@@ -597,6 +621,14 @@
       <hashTree>
         <HeaderManager guiclass="HeaderPanel" testclass="HeaderManager" testname="HTTP Header Manager" enabled="true">
           <collectionProp name="HeaderManager.headers">
+            <elementProp name="" elementType="Header">
+              <stringProp name="Header.name">Content-Type</stringProp>
+              <stringProp name="Header.value">multipart/form-data</stringProp>
+            </elementProp>
+            <elementProp name="" elementType="Header">
+              <stringProp name="Header.name">accept</stringProp>
+              <stringProp name="Header.value">application/json</stringProp>
+            </elementProp>
           </collectionProp>
         </HeaderManager>
         <hashTree/>
diff --git a/samples/client/petstore/jmeter/StoreApi.csv b/samples/client/petstore/jmeter/StoreApi.csv
index 2ccf8884aff0..70fd54e2b204 100644
--- a/samples/client/petstore/jmeter/StoreApi.csv
+++ b/samples/client/petstore/jmeter/StoreApi.csv
@@ -1,2 +1,2 @@
-testCase,httpStatusCode,orderId,orderId,order
+testCase,httpStatusCode,orderId,orderId,body
 Success,200,0,0,0
\ No newline at end of file
diff --git a/samples/client/petstore/jmeter/StoreApi.jmx b/samples/client/petstore/jmeter/StoreApi.jmx
index 21eb7f3059d7..79961e719e33 100644
--- a/samples/client/petstore/jmeter/StoreApi.jmx
+++ b/samples/client/petstore/jmeter/StoreApi.jmx
@@ -163,6 +163,10 @@
       <hashTree>
         <HeaderManager guiclass="HeaderPanel" testclass="HeaderManager" testname="HTTP Header Manager" enabled="true">
           <collectionProp name="HeaderManager.headers">
+            <elementProp name="" elementType="Header">
+              <stringProp name="Header.name">accept</stringProp>
+              <stringProp name="Header.value">application/json</stringProp>
+            </elementProp>
           </collectionProp>
         </HeaderManager>
         <hashTree/>
@@ -229,6 +233,10 @@
       <hashTree>
         <HeaderManager guiclass="HeaderPanel" testclass="HeaderManager" testname="HTTP Header Manager" enabled="true">
           <collectionProp name="HeaderManager.headers">
+            <elementProp name="" elementType="Header">
+              <stringProp name="Header.name">accept</stringProp>
+              <stringProp name="Header.value">application/xml</stringProp>
+            </elementProp>
           </collectionProp>
         </HeaderManager>
         <hashTree/>
@@ -295,6 +303,10 @@
       <hashTree>
         <HeaderManager guiclass="HeaderPanel" testclass="HeaderManager" testname="HTTP Header Manager" enabled="true">
           <collectionProp name="HeaderManager.headers">
+            <elementProp name="" elementType="Header">
+              <stringProp name="Header.name">accept</stringProp>
+              <stringProp name="Header.value">application/xml</stringProp>
+            </elementProp>
           </collectionProp>
         </HeaderManager>
         <hashTree/>
diff --git a/samples/client/petstore/jmeter/UserApi.csv b/samples/client/petstore/jmeter/UserApi.csv
index 66fcc84a5901..92242d4077c7 100644
--- a/samples/client/petstore/jmeter/UserApi.csv
+++ b/samples/client/petstore/jmeter/UserApi.csv
@@ -1,2 +1,2 @@
-testCase,httpStatusCode,user,user,user,username,username,username,password,username,user
+testCase,httpStatusCode,body,body,body,username,username,username,password,username,body
 Success,200,0,0,0,0,0,0,0,0,0
\ No newline at end of file
diff --git a/samples/client/petstore/jmeter/UserApi.jmx b/samples/client/petstore/jmeter/UserApi.jmx
index 2dd7aee906e2..099f00cc4df4 100644
--- a/samples/client/petstore/jmeter/UserApi.jmx
+++ b/samples/client/petstore/jmeter/UserApi.jmx
@@ -381,6 +381,10 @@
       <hashTree>
         <HeaderManager guiclass="HeaderPanel" testclass="HeaderManager" testname="HTTP Header Manager" enabled="true">
           <collectionProp name="HeaderManager.headers">
+            <elementProp name="" elementType="Header">
+              <stringProp name="Header.name">accept</stringProp>
+              <stringProp name="Header.value">application/xml</stringProp>
+            </elementProp>
           </collectionProp>
         </HeaderManager>
         <hashTree/>
@@ -447,6 +451,10 @@
       <hashTree>
         <HeaderManager guiclass="HeaderPanel" testclass="HeaderManager" testname="HTTP Header Manager" enabled="true">
           <collectionProp name="HeaderManager.headers">
+            <elementProp name="" elementType="Header">
+              <stringProp name="Header.name">accept</stringProp>
+              <stringProp name="Header.value">application/xml</stringProp>
+            </elementProp>
           </collectionProp>
         </HeaderManager>
         <hashTree/>