diff --git a/common.nix b/common.nix
index 1ecca88..6343c0d 100644
--- a/common.nix
+++ b/common.nix
@@ -29,6 +29,7 @@
     ./services/prowlarr.nix
     ./services/jellyfin.nix
     ./services/bazarr.nix
+    ./services/bazarr-sync.nix
     ./services/cloudflare-ddns.nix
     ./services/authelia.nix
     ./services/homepage.nix
diff --git a/services/bazarr-sync.nix b/services/bazarr-sync.nix
new file mode 100644
index 0000000..0f3bf28
--- /dev/null
+++ b/services/bazarr-sync.nix
@@ -0,0 +1,184 @@
+# services/bazarr-sync.nix — Subtitle sync via bazarr-sync.
+#
+# Two systemd timers:
+#   bazarr-sync         — hourly, targets only movies/shows added in the last
+#                         2 hours (queries Radarr/Sonarr APIs for recent items)
+#   bazarr-sync-full    — weekly full-library sync (every Sunday 04:00)
+#
+# Both use the same bazarr-sync container image under podman with --network host
+# so it can reach Bazarr on localhost:6767.
+{ config, lib, pkgs, ... }:
+let
+  deps = lib.makeBinPath [ pkgs.curl pkgs.jq pkgs.gnused pkgs.gnugrep pkgs.coreutils pkgs.podman ];
+
+  # Shared preamble: extract API keys and write config.yaml
+  preamble = ''
+    set -euo pipefail
+    PATH="${deps}:$PATH"
+
+    BASE="http://127.0.0.1"
+    CONFIG_DIR="/var/lib/bazarr-sync"
+    CONFIG_FILE="$CONFIG_DIR/config.yaml"
+
+    # --- Extract API keys (same pattern as arr-interconnect) ---
+    extract_arr_key() {
+      if [ -f "$1" ]; then
+        sed -n 's/.*<ApiKey>\(.*\)<\/ApiKey>.*/\1/p' "$1"
+      fi
+    }
+
+    SONARR_KEY=$(extract_arr_key "/var/lib/sonarr/config.xml")
+    RADARR_KEY=$(extract_arr_key "/var/lib/radarr/config.xml")
+
+    BAZARR_KEY=""
+    if [ -f "/var/lib/bazarr/data/config/config.ini" ]; then
+      BAZARR_KEY=$(grep -oP '(?<=apikey = ).*' /var/lib/bazarr/data/config/config.ini || true)
+    fi
+
+    if [ -z "$BAZARR_KEY" ]; then
+      echo "ERROR: Could not extract Bazarr API key"
+      exit 1
+    fi
+
+    # --- Write config.yaml for bazarr-sync ---
+    cat > "$CONFIG_FILE" <<EOF
+    address: "127.0.0.1"
+    port: 6767
+    protocol: "http"
+    apitoken: "$BAZARR_KEY"
+    EOF
+
+    IMAGE="ghcr.io/ajmandourah/bazarr-sync:latest"
+    run_sync() {
+      podman run --rm --network host \
+        -v "$CONFIG_FILE":/usr/src/app/config.yaml:ro \
+        "$IMAGE" bazarr-sync sync "$@"
+    }
+  '';
+
+  # Hourly: only sync recently added content
+  recentScript = pkgs.writeShellScript "bazarr-sync-recent" ''
+    ${preamble}
+
+    LOOKBACK_HOURS=2
+    CUTOFF=$(date -u -d "-$LOOKBACK_HOURS hours" +%Y-%m-%dT%H:%M:%SZ)
+
+    # --- Query Radarr for recently added movies ---
+    RADARR_IDS=""
+    if [ -n "$RADARR_KEY" ]; then
+      echo "Querying Radarr for movies added since $CUTOFF..."
+      RADARR_IDS=$(curl -sf -H "X-Api-Key: $RADARR_KEY" \
+        "$BASE:7878/api/v3/movie" | \
+        jq -r --arg cutoff "$CUTOFF" \
+        '[.[] | select(.added >= $cutoff) | .id] | map(tostring) | join(",")') || true
+      if [ -n "$RADARR_IDS" ]; then
+        echo "  Found recently added movies: $RADARR_IDS"
+      else
+        echo "  No recently added movies"
+      fi
+    fi
+
+    # --- Query Sonarr for series with recently imported episodes ---
+    SONARR_IDS=""
+    if [ -n "$SONARR_KEY" ]; then
+      echo "Querying Sonarr for recently imported episodes since $CUTOFF..."
+      SONARR_IDS=$(curl -sf -H "X-Api-Key: $SONARR_KEY" \
+        "$BASE:8989/api/v3/history?pageSize=200&sortKey=date&sortDirection=descending" | \
+        jq -r --arg cutoff "$CUTOFF" \
+        '[.records[] | select(.date >= $cutoff and .eventType == "downloadFolderImported") | .seriesId] | unique | map(tostring) | join(",")') || true
+      if [ -n "$SONARR_IDS" ]; then
+        echo "  Found series with recent imports: $SONARR_IDS"
+      else
+        echo "  No recently imported episodes"
+      fi
+    fi
+
+    # --- Exit early if nothing to do ---
+    if [ -z "$RADARR_IDS" ] && [ -z "$SONARR_IDS" ]; then
+      echo "Nothing new to sync. Exiting."
+      exit 0
+    fi
+
+    # --- Run bazarr-sync for recent movies ---
+    if [ -n "$RADARR_IDS" ]; then
+      echo "Syncing subtitles for movies: $RADARR_IDS"
+      run_sync movies --radarr-id "$RADARR_IDS" || echo "WARNING: Movie sync failed"
+    fi
+
+    # --- Run bazarr-sync for recent shows ---
+    if [ -n "$SONARR_IDS" ]; then
+      echo "Syncing subtitles for shows: $SONARR_IDS"
+      run_sync shows --sonarr-id "$SONARR_IDS" || echo "WARNING: Show sync failed"
+    fi
+
+    echo "Sync complete."
+  '';
+
+  # Weekly: full library sync
+  fullScript = pkgs.writeShellScript "bazarr-sync-full" ''
+    ${preamble}
+
+    echo "Starting full library subtitle sync..."
+
+    echo "Syncing all movies..."
+    run_sync movies || echo "WARNING: Full movie sync failed"
+
+    echo "Syncing all shows..."
+    run_sync shows || echo "WARNING: Full show sync failed"
+
+    echo "Full sync complete."
+  '';
+
+  serviceAfter = [ "bazarr.service" "sonarr.service" "radarr.service" "network-online.target" ];
+in
+{
+  config = lib.mkIf (config.networking.hostName == "FredOS-Mediaserver") {
+
+    # Persistent directory for the generated config.yaml
+    systemd.tmpfiles.rules = [
+      "d /var/lib/bazarr-sync 0700 root root -"
+    ];
+
+    # --- Hourly: recent additions only ---
+    systemd.services.bazarr-sync = {
+      description = "Sync subtitles for recently added media via bazarr-sync";
+      after = serviceAfter;
+      wants = [ "network-online.target" ];
+      serviceConfig = {
+        Type = "oneshot";
+        ExecStart = recentScript;
+      };
+    };
+
+    systemd.timers.bazarr-sync = {
+      description = "Run bazarr-sync hourly for recent additions";
+      wantedBy = [ "timers.target" ];
+      timerConfig = {
+        OnCalendar = "hourly";
+        RandomizedDelaySec = "5m";
+        Persistent = true;
+      };
+    };
+
+    # --- Weekly: full library sync ---
+    systemd.services.bazarr-sync-full = {
+      description = "Full library subtitle sync via bazarr-sync";
+      after = serviceAfter;
+      wants = [ "network-online.target" ];
+      serviceConfig = {
+        Type = "oneshot";
+        ExecStart = fullScript;
+      };
+    };
+
+    systemd.timers.bazarr-sync-full = {
+      description = "Run full bazarr-sync weekly (Sunday 04:00)";
+      wantedBy = [ "timers.target" ];
+      timerConfig = {
+        OnCalendar = "Sun *-*-* 04:00:00";
+        RandomizedDelaySec = "15m";
+        Persistent = true;
+      };
+    };
+  };
+}