diff --git a/src/NzbDrone.Core/Applications/AppIndexerMapService.cs b/src/NzbDrone.Core/Applications/AppIndexerMapService.cs
index 41c812fe1..cdfd59bd2 100644
--- a/src/NzbDrone.Core/Applications/AppIndexerMapService.cs
+++ b/src/NzbDrone.Core/Applications/AppIndexerMapService.cs
@@ -8,6 +8,7 @@ namespace NzbDrone.Core.Applications
     {
         List<AppIndexerMap> GetMappingsForApp(int appId);
         AppIndexerMap Insert(AppIndexerMap appIndexerMap);
+        void Delete(int mappingId);
         void DeleteAllForApp(int appId);
     }
 
@@ -25,6 +26,11 @@ namespace NzbDrone.Core.Applications
             _appIndexerMapRepository.DeleteAllForApp(appId);
         }
 
+        public void Delete(int mappingId)
+        {
+            _appIndexerMapRepository.Delete(mappingId);
+        }
+
         public List<AppIndexerMap> GetMappingsForApp(int appId)
         {
             return _appIndexerMapRepository.GetMappingsForApp(appId);
diff --git a/src/NzbDrone.Core/Applications/Lidarr/Lidarr.cs b/src/NzbDrone.Core/Applications/Lidarr/Lidarr.cs
index 0fc08aed3..5a638df22 100644
--- a/src/NzbDrone.Core/Applications/Lidarr/Lidarr.cs
+++ b/src/NzbDrone.Core/Applications/Lidarr/Lidarr.cs
@@ -47,8 +47,16 @@ namespace NzbDrone.Core.Applications.Lidarr
 
         public override void RemoveIndexer(int indexerId)
         {
-            //Use the Id mapping here to delete the correct indexer
-            throw new System.NotImplementedException();
+            var appMappings = _appIndexerMapService.GetMappingsForApp(Definition.Id);
+
+            var indexerMapping = appMappings.FirstOrDefault(m => m.IndexerId == indexerId);
+
+            if (indexerMapping != null)
+            {
+                //Remove Indexer remotely and then remove the mapping
+                _lidarrV1Proxy.RemoveIndexer(indexerMapping.RemoteIndexerId, Settings);
+                _appIndexerMapService.Delete(indexerMapping.Id);
+            }
         }
 
         public override void UpdateIndexer(IndexerDefinition indexer)
diff --git a/src/NzbDrone.Core/Applications/Lidarr/LidarrV1Proxy.cs b/src/NzbDrone.Core/Applications/Lidarr/LidarrV1Proxy.cs
index a62f9761e..adc72a12a 100644
--- a/src/NzbDrone.Core/Applications/Lidarr/LidarrV1Proxy.cs
+++ b/src/NzbDrone.Core/Applications/Lidarr/LidarrV1Proxy.cs
@@ -14,6 +14,7 @@ namespace NzbDrone.Core.Applications.Lidarr
         LidarrIndexer AddIndexer(LidarrIndexer indexer, LidarrSettings settings);
         List<LidarrIndexer> GetIndexers(LidarrSettings settings);
         List<LidarrIndexer> GetIndexerSchema(LidarrSettings settings);
+        void RemoveIndexer(int indexerId, LidarrSettings settings);
         ValidationFailure Test(LidarrSettings settings);
     }
 
diff --git a/src/NzbDrone.Core/Applications/Radarr/Radarr.cs b/src/NzbDrone.Core/Applications/Radarr/Radarr.cs
index fd0915ae5..c06ef0b7c 100644
--- a/src/NzbDrone.Core/Applications/Radarr/Radarr.cs
+++ b/src/NzbDrone.Core/Applications/Radarr/Radarr.cs
@@ -47,8 +47,16 @@ namespace NzbDrone.Core.Applications.Radarr
 
         public override void RemoveIndexer(int indexerId)
         {
-            //Use the Id mapping here to delete the correct indexer
-            throw new System.NotImplementedException();
+            var appMappings = _appIndexerMapService.GetMappingsForApp(Definition.Id);
+
+            var indexerMapping = appMappings.FirstOrDefault(m => m.IndexerId == indexerId);
+
+            if (indexerMapping != null)
+            {
+                //Remove Indexer remotely and then remove the mapping
+                _radarrV3Proxy.RemoveIndexer(indexerMapping.RemoteIndexerId, Settings);
+                _appIndexerMapService.Delete(indexerMapping.Id);
+            }
         }
 
         public override void UpdateIndexer(IndexerDefinition indexer)
diff --git a/src/NzbDrone.Core/Applications/Radarr/RadarrV3Proxy.cs b/src/NzbDrone.Core/Applications/Radarr/RadarrV3Proxy.cs
index e65b4e4f5..54aef898d 100644
--- a/src/NzbDrone.Core/Applications/Radarr/RadarrV3Proxy.cs
+++ b/src/NzbDrone.Core/Applications/Radarr/RadarrV3Proxy.cs
@@ -14,6 +14,7 @@ namespace NzbDrone.Core.Applications.Radarr
         RadarrIndexer AddIndexer(RadarrIndexer indexer, RadarrSettings settings);
         List<RadarrIndexer> GetIndexers(RadarrSettings settings);
         List<RadarrIndexer> GetIndexerSchema(RadarrSettings settings);
+        void RemoveIndexer(int indexerId, RadarrSettings settings);
         ValidationFailure Test(RadarrSettings settings);
     }
 
diff --git a/src/NzbDrone.Core/Applications/Readarr/Readarr.cs b/src/NzbDrone.Core/Applications/Readarr/Readarr.cs
index 632d171de..a0bb490e5 100644
--- a/src/NzbDrone.Core/Applications/Readarr/Readarr.cs
+++ b/src/NzbDrone.Core/Applications/Readarr/Readarr.cs
@@ -47,8 +47,16 @@ namespace NzbDrone.Core.Applications.Readarr
 
         public override void RemoveIndexer(int indexerId)
         {
-            //Use the Id mapping here to delete the correct indexer
-            throw new System.NotImplementedException();
+            var appMappings = _appIndexerMapService.GetMappingsForApp(Definition.Id);
+
+            var indexerMapping = appMappings.FirstOrDefault(m => m.IndexerId == indexerId);
+
+            if (indexerMapping != null)
+            {
+                //Remove Indexer remotely and then remove the mapping
+                _readarrV1Proxy.RemoveIndexer(indexerMapping.RemoteIndexerId, Settings);
+                _appIndexerMapService.Delete(indexerMapping.Id);
+            }
         }
 
         public override void UpdateIndexer(IndexerDefinition indexer)
diff --git a/src/NzbDrone.Core/Applications/Readarr/ReadarrV1Proxy.cs b/src/NzbDrone.Core/Applications/Readarr/ReadarrV1Proxy.cs
index 71e6d08b3..f39c4f34b 100644
--- a/src/NzbDrone.Core/Applications/Readarr/ReadarrV1Proxy.cs
+++ b/src/NzbDrone.Core/Applications/Readarr/ReadarrV1Proxy.cs
@@ -14,6 +14,7 @@ namespace NzbDrone.Core.Applications.Readarr
         ReadarrIndexer AddIndexer(ReadarrIndexer indexer, ReadarrSettings settings);
         List<ReadarrIndexer> GetIndexers(ReadarrSettings settings);
         List<ReadarrIndexer> GetIndexerSchema(ReadarrSettings settings);
+        void RemoveIndexer(int indexerId, ReadarrSettings settings);
         ValidationFailure Test(ReadarrSettings settings);
     }
 
diff --git a/src/NzbDrone.Core/Applications/Sonarr/Sonarr.cs b/src/NzbDrone.Core/Applications/Sonarr/Sonarr.cs
index 6f5fd37d9..836c082cd 100644
--- a/src/NzbDrone.Core/Applications/Sonarr/Sonarr.cs
+++ b/src/NzbDrone.Core/Applications/Sonarr/Sonarr.cs
@@ -47,8 +47,16 @@ namespace NzbDrone.Core.Applications.Sonarr
 
         public override void RemoveIndexer(int indexerId)
         {
-            //Use the Id mapping here to delete the correct indexer
-            throw new System.NotImplementedException();
+            var appMappings = _appIndexerMapService.GetMappingsForApp(Definition.Id);
+
+            var indexerMapping = appMappings.FirstOrDefault(m => m.IndexerId == indexerId);
+
+            if (indexerMapping != null)
+            {
+                //Remove Indexer remotely and then remove the mapping
+                _sonarrV3Proxy.RemoveIndexer(indexerMapping.RemoteIndexerId, Settings);
+                _appIndexerMapService.Delete(indexerMapping.Id);
+            }
         }
 
         public override void UpdateIndexer(IndexerDefinition indexer)
diff --git a/src/NzbDrone.Core/Applications/Sonarr/SonarrV3Proxy.cs b/src/NzbDrone.Core/Applications/Sonarr/SonarrV3Proxy.cs
index 390d7ea7c..fd0731a63 100644
--- a/src/NzbDrone.Core/Applications/Sonarr/SonarrV3Proxy.cs
+++ b/src/NzbDrone.Core/Applications/Sonarr/SonarrV3Proxy.cs
@@ -14,6 +14,7 @@ namespace NzbDrone.Core.Applications.Sonarr
         SonarrIndexer AddIndexer(SonarrIndexer indexer, SonarrSettings settings);
         List<SonarrIndexer> GetIndexers(SonarrSettings settings);
         List<SonarrIndexer> GetIndexerSchema(SonarrSettings settings);
+        void RemoveIndexer(int indexerId, SonarrSettings settings);
         ValidationFailure Test(SonarrSettings settings);
     }