diff --git a/netbox/dcim/models/device_component_templates.py b/netbox/dcim/models/device_component_templates.py
index ff5df9721..1799e1265 100644
--- a/netbox/dcim/models/device_component_templates.py
+++ b/netbox/dcim/models/device_component_templates.py
@@ -549,6 +549,14 @@ class PortTemplateMapping(PortMappingBase):
         self.module_type = self.front_port.module_type
         super().save(*args, **kwargs)
 
+    def to_yaml(self):
+        return {
+            'front_port': self.front_port.name,
+            'front_port_position': self.front_port_position,
+            'rear_port': self.rear_port.name,
+            'rear_port_position': self.rear_port_position,
+        }
+
 
 class FrontPortTemplate(ModularComponentTemplateModel):
     """
diff --git a/netbox/dcim/models/devices.py b/netbox/dcim/models/devices.py
index 4a5d0b3cd..aa4a794e2 100644
--- a/netbox/dcim/models/devices.py
+++ b/netbox/dcim/models/devices.py
@@ -275,6 +275,15 @@ class DeviceType(ImageAttachmentsMixin, PrimaryModel, WeightMixin):
             data['rear-ports'] = [
                 c.to_yaml() for c in self.rearporttemplates.all()
             ]
+
+        # Port mappings
+        port_mapping_data = [
+            c.to_yaml() for c in self.port_mappings.all()
+        ]
+
+        if port_mapping_data:
+            data['port-mappings'] = port_mapping_data
+
         if self.modulebaytemplates.exists():
             data['module-bays'] = [
                 c.to_yaml() for c in self.modulebaytemplates.all()
diff --git a/netbox/dcim/models/modules.py b/netbox/dcim/models/modules.py
index 89e914366..56cc333ff 100644
--- a/netbox/dcim/models/modules.py
+++ b/netbox/dcim/models/modules.py
@@ -192,6 +192,14 @@ class ModuleType(ImageAttachmentsMixin, PrimaryModel, WeightMixin):
                 c.to_yaml() for c in self.rearporttemplates.all()
             ]
 
+        # Port mappings
+        port_mapping_data = [
+            c.to_yaml() for c in self.port_mappings.all()
+        ]
+
+        if port_mapping_data:
+            data['port-mappings'] = port_mapping_data
+
         return yaml.dump(dict(data), sort_keys=False)