diff --git a/charts/library/common/Chart.yaml b/charts/library/common/Chart.yaml
index 3c575cb9..7b34ad75 100644
--- a/charts/library/common/Chart.yaml
+++ b/charts/library/common/Chart.yaml
@@ -3,7 +3,7 @@ apiVersion: v2
 name: common
 description: Function library for Helm charts
 type: library
-version: 4.0.0
+version: 4.0.1
 kubeVersion: ">=1.28.0-0"
 keywords:
   - common
@@ -46,6 +46,9 @@ annotations:
     - kind: added
       description: |-
         Added support for automatically determining the target service for Ingress paths if there is only one enabled Service
+    - kind: added
+      description: |-
+        Added support for automatically determining the target service for Route backends if there is only one enabled Service
     - kind: changed
       description: |-
         **Breaking**: Standardized resource name logic for all resources. This may cause changes in the generated resource names.
diff --git a/charts/library/common/README.md b/charts/library/common/README.md
index ec2b539b..5279b8e7 100644
--- a/charts/library/common/README.md
+++ b/charts/library/common/README.md
@@ -1,6 +1,6 @@
 # common
 
-![Version: 4.0.0](https://img.shields.io/badge/Version-4.0.0-informational?style=flat-square) ![Type: library](https://img.shields.io/badge/Type-library-informational?style=flat-square)
+![Version: 4.0.1](https://img.shields.io/badge/Version-4.0.1-informational?style=flat-square) ![Type: library](https://img.shields.io/badge/Type-library-informational?style=flat-square)
 
 Function library for Helm charts
 
@@ -31,7 +31,7 @@ Include this chart as a dependency in your `Chart.yaml` e.g.
 # Chart.yaml
 dependencies:
   - name: common
-    version: 4.0.0
+    version: 4.0.1
     repository: https://bjw-s-labs.github.io/helm-charts/
 ```
 
diff --git a/charts/library/common/templates/lib/routes/_getByIdentifier.tpl b/charts/library/common/templates/lib/routes/_getByIdentifier.tpl
index de8d6caa..5edf0839 100644
--- a/charts/library/common/templates/lib/routes/_getByIdentifier.tpl
+++ b/charts/library/common/templates/lib/routes/_getByIdentifier.tpl
@@ -4,10 +4,26 @@ Return a Route object by its Identifier.
 {{- define "bjw-s.common.lib.route.getByIdentifier" -}}
   {{- $rootContext := .rootContext -}}
   {{- $identifier := .id -}}
+
+  {{- $enabledServices := (include "bjw-s.common.lib.service.enabledServices" (dict "rootContext" $rootContext) | fromYaml ) -}}
   {{- $enabledRoutes := (include "bjw-s.common.lib.route.enabledRoutes" (dict "rootContext" $rootContext) | fromYaml ) }}
 
   {{- if (hasKey $enabledRoutes $identifier) -}}
     {{- $objectValues := get $enabledRoutes $identifier -}}
-    {{- include "bjw-s.common.lib.valuesToObject" (dict "rootContext" $rootContext "id" $identifier "values" $objectValues "itemCount" (len $enabledRoutes)) -}}
+    {{- $object := include "bjw-s.common.lib.valuesToObject" (dict "rootContext" $rootContext "id" $identifier "values" $objectValues "itemCount" (len $enabledRoutes)) | fromYaml -}}
+
+    {{- /* Try to automatically determine the default Service identifier if needed and possible */ -}}
+    {{- if eq 1 (len $enabledServices) -}}
+      {{- range $object.rules -}}
+        {{- range .backendRefs }}
+          {{- $backendRef := . -}}
+          {{- if and (empty (dig "name" nil $backendRef)) (empty (dig "identifier" nil $backendRef)) -}}
+            {{- $_ := set $backendRef "identifier" ($enabledServices | keys | first) -}}
+          {{- end -}}
+        {{- end -}}
+      {{- end -}}
+    {{- end -}}
+
+    {{- $object | toYaml -}}
   {{- end -}}
 {{- end -}}
diff --git a/charts/library/common/templates/lib/routes/_validate.tpl b/charts/library/common/templates/lib/routes/_validate.tpl
index 776494c0..b83d4972 100644
--- a/charts/library/common/templates/lib/routes/_validate.tpl
+++ b/charts/library/common/templates/lib/routes/_validate.tpl
@@ -5,6 +5,21 @@ Validate Route values
   {{- $rootContext := .rootContext -}}
   {{- $routeObject := .object -}}
 
+  {{- $enabledServices := (include "bjw-s.common.lib.service.enabledServices" (dict "rootContext" $rootContext) | fromYaml ) -}}
+
+  {{/* Verify automatic Service detection */}}
+  {{- if not (eq 1 (len $enabledServices)) -}}
+    {{- range $routeObject.rules -}}
+      {{- $rule := . -}}
+      {{- range $rule.backendRefs }}
+        {{- $backendRef := . -}}
+        {{- if and (empty (dig "name" nil $backendRef)) (empty (dig "identifier" nil $backendRef)) -}}
+          {{- fail (printf "Either name or identifier is required because automatic Service detection is not possible. (route: %s)" $routeObject.identifier) -}}
+        {{- end -}}
+      {{- end -}}
+    {{- end -}}
+  {{- end -}}
+
   {{/* Route Types */}}
   {{- $routeKind := $routeObject.kind | default "HTTPRoute"}}
   {{- if and (ne $routeKind "GRPCRoute") (ne $routeKind "HTTPRoute") (ne $routeKind "TCPRoute") (ne $routeKind "TLSRoute") (ne $routeKind "UDPRoute") }}
diff --git a/charts/library/common/test-chart/unittests/route/field_backendRefs_test.yaml b/charts/library/common/test-chart/unittests/route/field_backendRefs_test.yaml
index bdc0916e..0789cc13 100644
--- a/charts/library/common/test-chart/unittests/route/field_backendRefs_test.yaml
+++ b/charts/library/common/test-chart/unittests/route/field_backendRefs_test.yaml
@@ -60,6 +60,30 @@ tests:
             port: 8080
             weight: 1
 
+  - it: automatic service and port reference should pass
+    values:
+      - ../_values/service_main_default.yaml
+    set:
+      route.main:
+        parentRefs:
+          - name: parentName
+            namespace: parentNamespace
+        rules:
+          - backendRefs: [{}]
+    documentSelector:
+      path: $[?(@.kind == "HTTPRoute")].metadata.name
+      value: release-name
+    asserts:
+      - equal:
+          path: spec.rules[0].backendRefs[0]
+          value:
+            group: ""
+            kind: Service
+            name: release-name
+            namespace: NAMESPACE
+            port: 8081
+            weight: 1
+
   - it: custom service reference should pass
     set:
       route.main:
diff --git a/charts/library/common/test-chart/unittests/route/validations_test.yaml b/charts/library/common/test-chart/unittests/route/validations_test.yaml
index e4467a4f..13c9c321 100644
--- a/charts/library/common/test-chart/unittests/route/validations_test.yaml
+++ b/charts/library/common/test-chart/unittests/route/validations_test.yaml
@@ -41,3 +41,40 @@ tests:
     asserts:
       - failedTemplate:
           errorMessage: "backend refs and request redirect filters cannot co-exist."
+
+  - it: automatic service determination should fail when no service is enabled
+    set:
+      route.main:
+        parentRefs:
+          - name: parentName
+            namespace: parentNamespace
+        rules:
+          - backendRefs:
+              - port: 8080
+    asserts:
+      - failedTemplate:
+          errorMessage: "Either name or identifier is required because automatic Service detection is not possible. (route: main)"
+
+  - it: automatic service determination should fail when >1 service is enabled
+    set:
+      service:
+        main:
+          controller: main
+          ports:
+            ui:
+              port: 8082
+        second:
+          controller: main
+          ports:
+            ui:
+              port: 8082
+      route.main:
+        parentRefs:
+          - name: parentName
+            namespace: parentNamespace
+        rules:
+          - backendRefs:
+              - port: 8080
+    asserts:
+      - failedTemplate:
+          errorMessage: "Either name or identifier is required because automatic Service detection is not possible. (route: main)"
diff --git a/charts/library/common/test-chart/unittests/service/field_selector_test.yaml b/charts/library/common/test-chart/unittests/service/field_selector_test.yaml
new file mode 100644
index 00000000..27e6e6b9
--- /dev/null
+++ b/charts/library/common/test-chart/unittests/service/field_selector_test.yaml
@@ -0,0 +1,54 @@
+---
+# yaml-language-server: $schema=https://raw.githubusercontent.com/helm-unittest/helm-unittest/main/schema/helm-testsuite.json
+suite: service - fields - selector
+templates:
+  - common.yaml
+values:
+  - ../_values/controllers_main_default_container.yaml
+  - ../_values/service_main_default.yaml
+tests:
+  - it: selector is configured by default
+    documentSelector:
+      path: $[?(@.kind == "Service")].metadata.name
+      value: release-name
+    asserts:
+      - equal:
+          path: spec.selector
+          value:
+            app.kubernetes.io/controller: main
+            app.kubernetes.io/instance: RELEASE-NAME
+            app.kubernetes.io/name: RELEASE-NAME
+
+  - it: additional selector labels can be configured
+    set:
+      service:
+        main:
+          extraSelectorLabels:
+            extraLabel: extraValue
+    documentSelector:
+      path: $[?(@.kind == "Service")].metadata.name
+      value: release-name
+    asserts:
+      - equal:
+          path: spec.selector
+          value:
+            app.kubernetes.io/controller: main
+            app.kubernetes.io/instance: RELEASE-NAME
+            app.kubernetes.io/name: RELEASE-NAME
+            extraLabel: extraValue
+
+  - it: selector can determine default controller automatically
+    set:
+      service:
+        main:
+          controller: ""
+    documentSelector:
+      path: $[?(@.kind == "Service")].metadata.name
+      value: release-name
+    asserts:
+      - equal:
+          path: spec.selector
+          value:
+            app.kubernetes.io/controller: main
+            app.kubernetes.io/instance: RELEASE-NAME
+            app.kubernetes.io/name: RELEASE-NAME
diff --git a/charts/library/common/test-chart/unittests/service/validations_test.yaml b/charts/library/common/test-chart/unittests/service/validations_test.yaml
index 6a0d663f..984f9ca4 100644
--- a/charts/library/common/test-chart/unittests/service/validations_test.yaml
+++ b/charts/library/common/test-chart/unittests/service/validations_test.yaml
@@ -42,7 +42,6 @@ tests:
       - failedTemplate:
           errorMessage: "controller field is required because automatic controller detection is not possible. (service: main)"
 
-
   - it: no ports enabled should fail
     values:
       - ../_values/service_main_default.yaml
diff --git a/charts/library/common/values.schema.json b/charts/library/common/values.schema.json
index 72eed6d8..d3d2b49e 100644
--- a/charts/library/common/values.schema.json
+++ b/charts/library/common/values.schema.json
@@ -1,6 +1,6 @@
 {
   "$schema": "http://json-schema.org/draft-07/schema",
-  "$id": "https://raw.githubusercontent.com/bjw-s-labs/helm-charts/common-4.0.0/charts/library/common/values.schema.json",
+  "$id": "https://raw.githubusercontent.com/bjw-s-labs/helm-charts/common-4.0.1/charts/library/common/values.schema.json",
   "type": "object",
   "properties": {
     "global": {
diff --git a/charts/other/app-template/Chart.yaml b/charts/other/app-template/Chart.yaml
index bddab183..44b660a5 100644
--- a/charts/other/app-template/Chart.yaml
+++ b/charts/other/app-template/Chart.yaml
@@ -2,7 +2,7 @@
 apiVersion: v2
 description: A common powered chart template. This can be useful for small projects that don't have their own chart.
 name: app-template
-version: 4.0.0
+version: 4.0.1
 kubeVersion: ">=1.28.0-0"
 maintainers:
   - name: bjw-s
@@ -10,16 +10,16 @@ maintainers:
 dependencies:
   - name: common
     repository: https://bjw-s-labs.github.io/helm-charts
-    version: 4.0.0
+    version: 4.0.1
 sources:
   - https://github.com/bjw-s-labs/helm-charts
 annotations:
   artifacthub.io/changes: |-
     - kind: changed
       description: |-
-        Upgraded the common library to v4.0.0
+        Upgraded the common library to v4.0.1
       links:
         - name: Upgrade notes
           url: https://bjw-s-labs.github.io/helm-charts/docs/app-template/upgrade-instructions/
         - name: Detailed release notes
-          url: https://github.com/bjw-s-labs/helm-charts/releases/tag/common-4.0.0
+          url: https://github.com/bjw-s-labs/helm-charts/releases/tag/common-4.0.1
diff --git a/charts/other/app-template/README.md b/charts/other/app-template/README.md
index a4e4bbc0..57fb84ce 100644
--- a/charts/other/app-template/README.md
+++ b/charts/other/app-template/README.md
@@ -1,6 +1,6 @@
 # app-template
 
-![Version: 4.0.0](https://img.shields.io/badge/Version-4.0.0-informational?style=flat-square)
+![Version: 4.0.1](https://img.shields.io/badge/Version-4.0.1-informational?style=flat-square)
 
 A common powered chart template. This can be useful for small projects that don't have their own chart.
 
@@ -12,7 +12,7 @@ Kubernetes: `>=1.28.0-0`
 
 | Repository | Name | Version |
 |------------|------|---------|
-| https://bjw-s-labs.github.io/helm-charts | common | 4.0.0 |
+| https://bjw-s-labs.github.io/helm-charts | common | 4.0.1 |
 
 ## Installing the Chart
 
diff --git a/charts/other/app-template/schemas/helmrelease-helm-v2.schema.json b/charts/other/app-template/schemas/helmrelease-helm-v2.schema.json
index e32dac7e..cb9ab432 100644
--- a/charts/other/app-template/schemas/helmrelease-helm-v2.schema.json
+++ b/charts/other/app-template/schemas/helmrelease-helm-v2.schema.json
@@ -726,7 +726,7 @@
         "values": {
           "description": "Values holds the values for this Helm release.",
           "x-kubernetes-preserve-unknown-fields": true,
-          "$ref": "https://raw.githubusercontent.com/bjw-s-labs/helm-charts/common-4.0.0/charts/library/common/values.schema.json"
+          "$ref": "https://raw.githubusercontent.com/bjw-s-labs/helm-charts/common-4.0.1/charts/library/common/values.schema.json"
         },
         "valuesFrom": {
           "description": "ValuesFrom holds references to resources containing Helm values for this HelmRelease,\nand information about how they should be merged.",
diff --git a/charts/other/app-template/schemas/helmrelease-helm-v2beta2.schema.json b/charts/other/app-template/schemas/helmrelease-helm-v2beta2.schema.json
index fd53fd47..6989229d 100644
--- a/charts/other/app-template/schemas/helmrelease-helm-v2beta2.schema.json
+++ b/charts/other/app-template/schemas/helmrelease-helm-v2beta2.schema.json
@@ -727,7 +727,7 @@
         "values": {
           "description": "Values holds the values for this Helm release.",
           "x-kubernetes-preserve-unknown-fields": true,
-          "$ref": "https://raw.githubusercontent.com/bjw-s-labs/helm-charts/common-4.0.0/charts/library/common/values.schema.json"
+          "$ref": "https://raw.githubusercontent.com/bjw-s-labs/helm-charts/common-4.0.1/charts/library/common/values.schema.json"
         },
         "valuesFrom": {
           "description": "ValuesFrom holds references to resources containing Helm values for this HelmRelease, and information about how they should be merged.",
diff --git a/charts/other/app-template/values.schema.json b/charts/other/app-template/values.schema.json
index 00e67961..bdb00822 100644
--- a/charts/other/app-template/values.schema.json
+++ b/charts/other/app-template/values.schema.json
@@ -1,3 +1,3 @@
 {
-  "$ref": "https://raw.githubusercontent.com/bjw-s-labs/helm-charts/common-4.0.0/charts/library/common/values.schema.json"
+  "$ref": "https://raw.githubusercontent.com/bjw-s-labs/helm-charts/common-4.0.1/charts/library/common/values.schema.json"
 }