diff --git a/docs/sources/setup/install/helm/reference.md b/docs/sources/setup/install/helm/reference.md
index bf24f6f5ab058..ca634389f392b 100644
--- a/docs/sources/setup/install/helm/reference.md
+++ b/docs/sources/setup/install/helm/reference.md
@@ -12294,7 +12294,7 @@ false
 			<td>string</td>
 			<td>Docker image tag</td>
 			<td><pre lang="json">
-"1.30.10"
+"2.1.2"
 </pre>
 </td>
 		</tr>
diff --git a/production/helm/loki/CHANGELOG.md b/production/helm/loki/CHANGELOG.md
index 16066af359e23..78ce12f97e302 100644
--- a/production/helm/loki/CHANGELOG.md
+++ b/production/helm/loki/CHANGELOG.md
@@ -13,6 +13,7 @@ Entries should include a reference to the pull request that introduced the chang
 
 ## Unreleased
 
+- [FEATURE] Bump sidecar to 2.1.2, and add the now mandatory /tmp volumeMount. [#19759](https://github.com/grafana/loki/pull/19759)
 
 ## 6.46.0
 
diff --git a/production/helm/loki/templates/backend/statefulset-backend.yaml b/production/helm/loki/templates/backend/statefulset-backend.yaml
index c59d80c5e7911..e09c4c8487f32 100644
--- a/production/helm/loki/templates/backend/statefulset-backend.yaml
+++ b/production/helm/loki/templates/backend/statefulset-backend.yaml
@@ -218,7 +218,9 @@ spec:
           volumeMounts:
             - name: sc-rules-volume
               mountPath: {{ .Values.sidecar.rules.folder | quote }}
-        {{- end}}
+            - name: sc-rules-tmp
+              mountPath: /tmp
+        {{- end }}
         {{- with .Values.backend.extraContainers }}
         {{- toYaml . | nindent 8}}
         {{- end }}
@@ -270,7 +272,9 @@ spec:
             sizeLimit: {{ .Values.sidecar.rules.sizeLimit }}
         {{- else }}
           emptyDir: {}
-        {{- end -}}
+        {{- end }}
+        - name: sc-rules-tmp
+          emptyDir: {}
         {{- end -}}
         {{- with (concat .Values.global.extraVolumes .Values.backend.extraVolumes) | uniq }}
         {{- toYaml . | nindent 8 }}
diff --git a/production/helm/loki/templates/ruler/statefulset-ruler.yaml b/production/helm/loki/templates/ruler/statefulset-ruler.yaml
index 61994f1bfefd5..d2e508dc8f99f 100644
--- a/production/helm/loki/templates/ruler/statefulset-ruler.yaml
+++ b/production/helm/loki/templates/ruler/statefulset-ruler.yaml
@@ -192,7 +192,9 @@ spec:
           volumeMounts:
             - name: sc-rules-volume
               mountPath: {{ .Values.sidecar.rules.folder | quote }}
-        {{- end}}
+            - name: sc-rules-tmp
+              mountPath: /tmp
+        {{- end }}
         {{- with .Values.ruler.extraContainers }}
         {{- toYaml . | nindent 8}}
         {{- end }}
@@ -234,7 +236,9 @@ spec:
             sizeLimit: {{ .Values.sidecar.rules.sizeLimit }}
         {{- else }}
           emptyDir: {}
-        {{- end -}}
+        {{- end }}
+        - name: sc-rules-tmp
+          emptyDir: {}
         {{- end -}}
         {{- range $dir, $_ := .Values.ruler.directories }}
         - name: {{ include "loki.rulerRulesDirName" $dir }}
diff --git a/production/helm/loki/templates/single-binary/statefulset.yaml b/production/helm/loki/templates/single-binary/statefulset.yaml
index 3fb56e1a1910f..7c8b969c65bac 100644
--- a/production/helm/loki/templates/single-binary/statefulset.yaml
+++ b/production/helm/loki/templates/single-binary/statefulset.yaml
@@ -228,7 +228,9 @@ spec:
           volumeMounts:
             - name: sc-rules-volume
               mountPath: {{ .Values.sidecar.rules.folder | quote }}
-        {{- end}}
+            - name: sc-rules-tmp
+              mountPath: /tmp
+        {{- end }}
         {{- with .Values.singleBinary.extraContainers }}
         {{- toYaml . | nindent 8 }}
         {{- end }}
@@ -272,7 +274,9 @@ spec:
             sizeLimit: {{ .Values.sidecar.rules.sizeLimit }}
         {{- else }}
           emptyDir: {}
-        {{- end -}}
+        {{- end }}
+        - name: sc-rules-tmp
+          emptyDir: {}
         {{- end -}}
         {{- with .Values.singleBinary.extraVolumes }}
         {{- toYaml . | nindent 8 }}
diff --git a/production/helm/loki/values.yaml b/production/helm/loki/values.yaml
index 99a8846940be0..732f2d86becf2 100644
--- a/production/helm/loki/values.yaml
+++ b/production/helm/loki/values.yaml
@@ -4000,7 +4000,7 @@ sidecar:
     # -- The Docker registry and image for the k8s sidecar
     repository: docker.io/kiwigrid/k8s-sidecar
     # -- Docker image tag
-    tag: 1.30.10
+    tag: 2.1.2
     # -- Docker image sha. If empty, no sha will be used
     sha: ""
     # -- Docker image pull policy