diff --git a/netbox/dcim/api/nested_serializers.py b/netbox/dcim/api/nested_serializers.py
index 0ec0e07e0..1be8bb9dc 100644
--- a/netbox/dcim/api/nested_serializers.py
+++ b/netbox/dcim/api/nested_serializers.py
@@ -5,6 +5,7 @@ from netbox.api.serializers import BaseModelSerializer, WritableNestedSerializer
 
 __all__ = [
     'ComponentNestedModuleSerializer',
+    'ModuleBayNestedModuleSerializer',
     'NestedCableSerializer',
     'NestedConsolePortSerializer',
     'NestedConsolePortTemplateSerializer',
@@ -281,6 +282,14 @@ class ModuleNestedModuleBaySerializer(WritableNestedSerializer):
         fields = ['id', 'url', 'display', 'name']
 
 
+class ModuleBayNestedModuleSerializer(WritableNestedSerializer):
+    url = serializers.HyperlinkedIdentityField(view_name='dcim-api:module-detail')
+
+    class Meta:
+        model = models.Module
+        fields = ['id', 'url', 'display', 'serial']
+
+
 class ComponentNestedModuleSerializer(WritableNestedSerializer):
     """
     Used by device component serializers.
diff --git a/netbox/dcim/api/serializers.py b/netbox/dcim/api/serializers.py
index 7fcab6ba3..c2cb846a9 100644
--- a/netbox/dcim/api/serializers.py
+++ b/netbox/dcim/api/serializers.py
@@ -886,12 +886,12 @@ class FrontPortSerializer(NetBoxModelSerializer, LinkTerminationSerializer):
 class ModuleBaySerializer(NetBoxModelSerializer):
     url = serializers.HyperlinkedIdentityField(view_name='dcim-api:modulebay-detail')
     device = NestedDeviceSerializer()
-    # installed_module = NestedModuleSerializer(required=False, allow_null=True)
+    installed_module = ModuleBayNestedModuleSerializer(required=False, allow_null=True)
 
     class Meta:
         model = ModuleBay
         fields = [
-            'id', 'url', 'display', 'device', 'name', 'label', 'position', 'description', 'tags', 'custom_fields',
+            'id', 'url', 'display', 'device', 'name', 'installed_module', 'label', 'position', 'description', 'tags', 'custom_fields',
             'created', 'last_updated',
         ]
 
diff --git a/netbox/dcim/api/views.py b/netbox/dcim/api/views.py
index c4c25f654..3fa652a9b 100644
--- a/netbox/dcim/api/views.py
+++ b/netbox/dcim/api/views.py
@@ -611,7 +611,7 @@ class RearPortViewSet(PassThroughPortMixin, NetBoxModelViewSet):
 
 
 class ModuleBayViewSet(NetBoxModelViewSet):
-    queryset = ModuleBay.objects.prefetch_related('tags')
+    queryset = ModuleBay.objects.prefetch_related('tags', 'installed_module')
     serializer_class = serializers.ModuleBaySerializer
     filterset_class = filtersets.ModuleBayFilterSet
     brief_prefetch_fields = ['device']
diff --git a/netbox/dcim/filtersets.py b/netbox/dcim/filtersets.py
index f052a8be9..4b4201578 100644
--- a/netbox/dcim/filtersets.py
+++ b/netbox/dcim/filtersets.py
@@ -992,6 +992,12 @@ class ModuleFilterSet(NetBoxModelFilterSet):
         to_field_name='model',
         label='Module type (model)',
     )
+    module_bay_id = django_filters.ModelMultipleChoiceFilter(
+        field_name='module_bay',
+        queryset=ModuleBay.objects.all(),
+        to_field_name='id',
+        label='Module Bay (ID)'
+    )
     device_id = django_filters.ModelMultipleChoiceFilter(
         queryset=Device.objects.all(),
         label='Device (ID)',
diff --git a/netbox/dcim/tests/test_filtersets.py b/netbox/dcim/tests/test_filtersets.py
index 273ee6570..47aa9368c 100644
--- a/netbox/dcim/tests/test_filtersets.py
+++ b/netbox/dcim/tests/test_filtersets.py
@@ -1849,6 +1849,11 @@ class ModuleTestCase(TestCase, ChangeLoggedFilterSetTests):
         params = {'module_type': [module_types[0].model, module_types[1].model]}
         self.assertEqual(self.filterset(params, self.queryset).qs.count(), 6)
 
+    def test_module_bay(self):
+        module_bays = ModuleBay.objects.all()[:2]
+        params = {'module_bay_id': [module_bays[0].pk, module_bays[1].pk]}
+        self.assertEqual(self.filterset(params, self.queryset).qs.count(), 2)
+
     def test_device(self):
         device_types = Device.objects.all()[:2]
         params = {'device_id': [device_types[0].pk, device_types[1].pk]}