diff --git a/dbus/dbuspassiveredundancy.hpp b/dbus/dbuspassiveredundancy.hpp
new file mode 100644
index 0000000..3d7e2a6
--- /dev/null
+++ b/dbus/dbuspassiveredundancy.hpp
@@ -0,0 +1,43 @@
+/*
+// Copyright (c) 2019 Intel Corporation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+*/
+
+#pragma once
+
+#include <sdbusplus/bus.hpp>
+#include <sdbusplus/bus/match.hpp>
+#include <set>
+
+/*
+ * DbusPassiveRedundancy monitors the fan redundancy interface via dbus match
+ * for changes. When the "Status" property changes to  Failed, all sensors in
+ * the interface's "Collection" property are added to the failed member. This
+ * set can then be queried by a sensor to see if they are part of a failed
+ * redundancy collection. When this happens, they get marked as failed.
+ */
+
+class DbusPassiveRedundancy
+{
+  public:
+    DbusPassiveRedundancy(sdbusplus::bus::bus& bus);
+    const std::set<std::string>& getFailed(void);
+
+  private:
+    void populateFailures(void);
+
+    sdbusplus::bus::match::match match;
+    std::set<std::string> failed;
+    sdbusplus::bus::bus& passiveBus;
+};