diff --git a/networksecurity/service/src/com/android/server/net/ct/CertificateTransparencyDownloader.java b/networksecurity/service/src/com/android/server/net/ct/CertificateTransparencyDownloader.java
index 56a5ee5..ef0d0ea 100644
--- a/networksecurity/service/src/com/android/server/net/ct/CertificateTransparencyDownloader.java
+++ b/networksecurity/service/src/com/android/server/net/ct/CertificateTransparencyDownloader.java
@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 package com.android.server.net.ct;
 
 import static java.nio.charset.StandardCharsets.UTF_8;
@@ -201,9 +202,8 @@
 
         String version = null;
         try (InputStream inputStream = mContext.getContentResolver().openInputStream(contentUri)) {
-            version =
-                    new JSONObject(new String(inputStream.readAllBytes(), UTF_8))
-                            .getString("version");
+            version = new JSONObject(new String(inputStream.readAllBytes(), UTF_8))
+                    .getString("version");
         } catch (JSONException | IOException e) {
             Log.e(TAG, "Could not extract version from log list", e);
             return;
@@ -219,13 +219,44 @@
         if (success) {
             // Update information about the stored version on successful install.
             mDataStore.setProperty(Config.VERSION, version);
+
+            // Reset the number of consecutive log list failure updates back to zero.
+            mDataStore.setPropertyLong(Config.LOG_LIST_UPDATE_FAILURE_COUNT, /* value= */ 0L);
             mDataStore.store();
+        } else {
+            if (updateFailureCount()) {
+                // TODO(378626065): Report FAILURE_VERSION_ALREADY_EXISTS failure via statsd.
+            }
         }
     }
 
     private void handleDownloadFailed(DownloadStatus status) {
         Log.e(TAG, "Download failed with " + status);
-        // TODO(378626065): Report failure via statsd.
+
+        if (updateFailureCount()) {
+            // TODO(378626065): Report download failure via statsd.
+        }
+    }
+
+    /**
+     * Updates the data store with the current number of consecutive log list update failures.
+     *
+     * @return whether the failure count exceeds the threshold and should be logged.
+     */
+    private boolean updateFailureCount() {
+        long failure_count = mDataStore.getPropertyLong(
+                Config.LOG_LIST_UPDATE_FAILURE_COUNT, /* defaultValue= */ 0L);
+        long new_failure_count = failure_count + 1L;
+
+        mDataStore.setPropertyLong(Config.LOG_LIST_UPDATE_FAILURE_COUNT, new_failure_count);
+        mDataStore.store();
+
+        boolean shouldReport = new_failure_count >= Config.LOG_LIST_UPDATE_FAILURE_THRESHOLD;
+        if (shouldReport) {
+            Log.e(TAG,
+                    "Log list update failure count exceeds threshold: " + new_failure_count);
+        }
+        return shouldReport;
     }
 
     private long download(String url) {
diff --git a/networksecurity/service/src/com/android/server/net/ct/Config.java b/networksecurity/service/src/com/android/server/net/ct/Config.java
index 70d8e42..edd6a80 100644
--- a/networksecurity/service/src/com/android/server/net/ct/Config.java
+++ b/networksecurity/service/src/com/android/server/net/ct/Config.java
@@ -54,10 +54,14 @@
     static final String METADATA_DOWNLOAD_ID = "metadata_download_id";
     static final String PUBLIC_KEY_URL = "public_key_url";
     static final String PUBLIC_KEY_DOWNLOAD_ID = "public_key_download_id";
+    static final String LOG_LIST_UPDATE_FAILURE_COUNT = "log_list_update_failure_count";
 
     // URLs
     static final String URL_PREFIX = "https://www.gstatic.com/android/certificate_transparency/";
     static final String URL_LOG_LIST = URL_PREFIX + "log_list.json";
     static final String URL_SIGNATURE = URL_PREFIX + "log_list.sig";
     static final String URL_PUBLIC_KEY = URL_PREFIX + "log_list.pub";
+
+    // Threshold amounts
+    static final long LOG_LIST_UPDATE_FAILURE_THRESHOLD = 10L;
 }
diff --git a/networksecurity/tests/unit/src/com/android/server/net/ct/CertificateTransparencyDownloaderTest.java b/networksecurity/tests/unit/src/com/android/server/net/ct/CertificateTransparencyDownloaderTest.java
index ffa1283..5c4a4e5 100644
--- a/networksecurity/tests/unit/src/com/android/server/net/ct/CertificateTransparencyDownloaderTest.java
+++ b/networksecurity/tests/unit/src/com/android/server/net/ct/CertificateTransparencyDownloaderTest.java
@@ -186,6 +186,47 @@
     }
 
     @Test
+    public void testDownloader_publicKeyDownloadFail_failureThresholdExceeded_logsFailure()
+                throws Exception {
+        long publicKeyId = mCertificateTransparencyDownloader.startPublicKeyDownload();
+        // Set the failure count to just below the threshold
+        mDataStore.setPropertyLong(Config.LOG_LIST_UPDATE_FAILURE_COUNT,
+                Config.LOG_LIST_UPDATE_FAILURE_THRESHOLD - 1);
+        setFailedDownload(
+                publicKeyId, // Failure cases where we give up on the download.
+                DownloadManager.ERROR_INSUFFICIENT_SPACE,
+                DownloadManager.ERROR_HTTP_DATA_ERROR);
+        Intent downloadCompleteIntent = makeDownloadCompleteIntent(publicKeyId);
+
+        mCertificateTransparencyDownloader.onReceive(mContext, downloadCompleteIntent);
+
+        assertThat(mDataStore.getPropertyLong(
+                Config.LOG_LIST_UPDATE_FAILURE_COUNT, /* defaultValue= */ 0L))
+                        .isEqualTo(Config.LOG_LIST_UPDATE_FAILURE_THRESHOLD);
+        // TODO(378626065): Verify logged failure via statsd.
+    }
+
+    @Test
+    public void testDownloader_publicKeyDownloadFail_failureThresholdNotMet_doesNotLog()
+                throws Exception {
+        long publicKeyId = mCertificateTransparencyDownloader.startPublicKeyDownload();
+        // Set the failure count to just below the threshold
+        mDataStore.setPropertyLong(Config.LOG_LIST_UPDATE_FAILURE_COUNT, 0);
+        setFailedDownload(
+                publicKeyId, // Failure cases where we give up on the download.
+                DownloadManager.ERROR_INSUFFICIENT_SPACE,
+                DownloadManager.ERROR_HTTP_DATA_ERROR);
+        Intent downloadCompleteIntent = makeDownloadCompleteIntent(publicKeyId);
+
+        mCertificateTransparencyDownloader.onReceive(mContext, downloadCompleteIntent);
+
+        assertThat(mDataStore.getPropertyLong(
+                Config.LOG_LIST_UPDATE_FAILURE_COUNT, /* defaultValue= */ 0L))
+                        .isEqualTo(1);
+        // TODO(378626065): Verify no failure logged via statsd.
+    }
+
+    @Test
     public void testDownloader_metadataDownloadSuccess_startContentDownload() {
         long metadataId = mCertificateTransparencyDownloader.startMetadataDownload();
         setSuccessfulDownload(metadataId, new File("log_list.sig"));
@@ -215,6 +256,49 @@
     }
 
     @Test
+    public void testDownloader_metadataDownloadFail_failureThresholdExceeded_logsFailure()
+                throws Exception {
+        long metadataId = mCertificateTransparencyDownloader.startMetadataDownload();
+        // Set the failure count to just below the threshold
+        mDataStore.setPropertyLong(Config.LOG_LIST_UPDATE_FAILURE_COUNT,
+                Config.LOG_LIST_UPDATE_FAILURE_THRESHOLD - 1);
+        setFailedDownload(
+                metadataId,
+                // Failure cases where we give up on the download.
+                DownloadManager.ERROR_INSUFFICIENT_SPACE,
+                DownloadManager.ERROR_HTTP_DATA_ERROR);
+        Intent downloadCompleteIntent = makeDownloadCompleteIntent(metadataId);
+
+        mCertificateTransparencyDownloader.onReceive(mContext, downloadCompleteIntent);
+
+        assertThat(mDataStore.getPropertyLong(
+                Config.LOG_LIST_UPDATE_FAILURE_COUNT, /* defaultValue= */ 0L))
+                        .isEqualTo(Config.LOG_LIST_UPDATE_FAILURE_THRESHOLD);
+        // TODO(378626065): Verify logged failure via statsd.
+    }
+
+    @Test
+    public void testDownloader_metadataDownloadFail_failureThresholdNotMet_doesNotLog()
+                throws Exception {
+        long metadataId = mCertificateTransparencyDownloader.startMetadataDownload();
+        // Set the failure count to just below the threshold
+        mDataStore.setPropertyLong(Config.LOG_LIST_UPDATE_FAILURE_COUNT, 0);
+        setFailedDownload(
+                metadataId,
+                // Failure cases where we give up on the download.
+                DownloadManager.ERROR_INSUFFICIENT_SPACE,
+                DownloadManager.ERROR_HTTP_DATA_ERROR);
+        Intent downloadCompleteIntent = makeDownloadCompleteIntent(metadataId);
+
+        mCertificateTransparencyDownloader.onReceive(mContext, downloadCompleteIntent);
+
+        assertThat(mDataStore.getPropertyLong(
+                Config.LOG_LIST_UPDATE_FAILURE_COUNT, /* defaultValue= */ 0L))
+                        .isEqualTo(1);
+        // TODO(378626065): Verify no failure logged via statsd.
+    }
+
+    @Test
     public void testDownloader_contentDownloadSuccess_installSuccess_updateDataStore()
             throws Exception {
         String newVersion = "456";
@@ -254,6 +338,49 @@
     }
 
     @Test
+    public void testDownloader_contentDownloadFail_failureThresholdExceeded_logsFailure()
+                throws Exception {
+        long contentId = mCertificateTransparencyDownloader.startContentDownload();
+        // Set the failure count to just below the threshold
+        mDataStore.setPropertyLong(Config.LOG_LIST_UPDATE_FAILURE_COUNT,
+                Config.LOG_LIST_UPDATE_FAILURE_THRESHOLD - 1);
+        setFailedDownload(
+                contentId,
+                // Failure cases where we give up on the download.
+                DownloadManager.ERROR_INSUFFICIENT_SPACE,
+                DownloadManager.ERROR_HTTP_DATA_ERROR);
+        Intent downloadCompleteIntent = makeDownloadCompleteIntent(contentId);
+
+        mCertificateTransparencyDownloader.onReceive(mContext, downloadCompleteIntent);
+
+        assertThat(mDataStore.getPropertyLong(
+                Config.LOG_LIST_UPDATE_FAILURE_COUNT, /* defaultValue= */ 0L))
+                        .isEqualTo(Config.LOG_LIST_UPDATE_FAILURE_THRESHOLD);
+        // TODO(378626065): Verify logged failure via statsd.
+    }
+
+    @Test
+    public void testDownloader_contentDownloadFail_failureThresholdNotMet_doesNotLog()
+                throws Exception {
+        long contentId = mCertificateTransparencyDownloader.startContentDownload();
+        // Set the failure count to just below the threshold
+        mDataStore.setPropertyLong(Config.LOG_LIST_UPDATE_FAILURE_COUNT, 0);
+        setFailedDownload(
+                contentId,
+                // Failure cases where we give up on the download.
+                DownloadManager.ERROR_INSUFFICIENT_SPACE,
+                DownloadManager.ERROR_HTTP_DATA_ERROR);
+        Intent downloadCompleteIntent = makeDownloadCompleteIntent(contentId);
+
+        mCertificateTransparencyDownloader.onReceive(mContext, downloadCompleteIntent);
+
+        assertThat(mDataStore.getPropertyLong(
+                Config.LOG_LIST_UPDATE_FAILURE_COUNT, /* defaultValue= */ 0L))
+                        .isEqualTo(1);
+        // TODO(378626065): Verify no failure logged via statsd.
+    }
+
+    @Test
     public void testDownloader_contentDownloadSuccess_installFail_doNotUpdateDataStore()
             throws Exception {
         File logListFile = makeLogListFile("456");
@@ -275,6 +402,59 @@
     }
 
     @Test
+    public void
+            testDownloader_contentDownloadSuccess_installFail_failureThresholdExceeded_logsFailure()
+                    throws Exception {
+        File logListFile = makeLogListFile("456");
+        File metadataFile = sign(logListFile);
+        mSignatureVerifier.setPublicKey(mPublicKey);
+        long metadataId = mCertificateTransparencyDownloader.startMetadataDownload();
+        setSuccessfulDownload(metadataId, metadataFile);
+        long contentId = mCertificateTransparencyDownloader.startContentDownload();
+        setSuccessfulDownload(contentId, logListFile);
+        // Set the failure count to just below the threshold
+        mDataStore.setPropertyLong(Config.LOG_LIST_UPDATE_FAILURE_COUNT,
+                Config.LOG_LIST_UPDATE_FAILURE_THRESHOLD - 1);
+        when(mCertificateTransparencyInstaller.install(
+                        eq(Config.COMPATIBILITY_VERSION), any(), anyString()))
+                .thenReturn(false);
+
+        mCertificateTransparencyDownloader.onReceive(
+                mContext, makeDownloadCompleteIntent(contentId));
+
+        assertThat(mDataStore.getPropertyLong(
+                Config.LOG_LIST_UPDATE_FAILURE_COUNT, /* defaultValue= */ 0L))
+                        .isEqualTo(Config.LOG_LIST_UPDATE_FAILURE_THRESHOLD);
+        // TODO(378626065): Verify logged failure via statsd.
+    }
+
+    @Test
+    public void
+            testDownloader_contentDownloadSuccess_installFail_failureThresholdNotMet_doesNotLog()
+                    throws Exception {
+        File logListFile = makeLogListFile("456");
+        File metadataFile = sign(logListFile);
+        mSignatureVerifier.setPublicKey(mPublicKey);
+        long metadataId = mCertificateTransparencyDownloader.startMetadataDownload();
+        setSuccessfulDownload(metadataId, metadataFile);
+        long contentId = mCertificateTransparencyDownloader.startContentDownload();
+        setSuccessfulDownload(contentId, logListFile);
+        // Set the failure count to just below the threshold
+        mDataStore.setPropertyLong(Config.LOG_LIST_UPDATE_FAILURE_COUNT, 0);
+        when(mCertificateTransparencyInstaller.install(
+                        eq(Config.COMPATIBILITY_VERSION), any(), anyString()))
+                .thenReturn(false);
+
+        mCertificateTransparencyDownloader.onReceive(
+                mContext, makeDownloadCompleteIntent(contentId));
+
+        assertThat(mDataStore.getPropertyLong(
+                Config.LOG_LIST_UPDATE_FAILURE_COUNT, /* defaultValue= */ 0L))
+                        .isEqualTo(1);
+        // TODO(378626065): Verify no failure logged via statsd.
+    }
+
+    @Test
     public void testDownloader_contentDownloadSuccess_verificationFail_doNotInstall()
             throws Exception {
         File logListFile = makeLogListFile("456");