diff --git a/plugins/repository-s3/README.md b/plugins/repository-s3/README.md
index 9bd2fb4bed2e1..a8e0882164ae1 100644
--- a/plugins/repository-s3/README.md
+++ b/plugins/repository-s3/README.md
@@ -27,3 +27,4 @@ Optional environment variables:
 
 - `amazon_s3_path_style_access`: Possible values true or false. Default is false.
 - `amazon_s3_endpoint`: s3 custom endpoint url if aws s3 default endpoint is not being used.
+
diff --git a/plugins/repository-s3/src/main/java/org/opensearch/repositories/s3/S3ClientSettings.java b/plugins/repository-s3/src/main/java/org/opensearch/repositories/s3/S3ClientSettings.java
index ee4a7ac09cca1..c3f410fefeaff 100644
--- a/plugins/repository-s3/src/main/java/org/opensearch/repositories/s3/S3ClientSettings.java
+++ b/plugins/repository-s3/src/main/java/org/opensearch/repositories/s3/S3ClientSettings.java
@@ -443,6 +443,7 @@ S3ClientSettings refine(Settings repositorySettings) {
             && newConnectionTTLMillis == connectionTTLMillis
             && newMaxConnections == maxConnections
             && newConnectionAcquisitionTimeoutMillis == connectionAcquisitionTimeoutMillis
+            && newMaxSyncConnections == maxSyncConnections // added maxSyncConnections
             && maxRetries == newMaxRetries
             && newThrottleRetries == throttleRetries
             && Objects.equals(credentials, newCredentials)
@@ -673,6 +674,7 @@ public boolean equals(final Object o) {
             && connectionTimeoutMillis == that.connectionTimeoutMillis
             && connectionTTLMillis == that.connectionTTLMillis
             && maxConnections == that.maxConnections
+            && maxSyncConnections == that.maxSyncConnections       // fixed here
             && connectionAcquisitionTimeoutMillis == that.connectionAcquisitionTimeoutMillis
             && maxRetries == that.maxRetries
             && throttleRetries == that.throttleRetries
@@ -680,7 +682,7 @@ public boolean equals(final Object o) {
             && Objects.equals(endpoint, that.endpoint)
             && protocol == that.protocol
             && proxySettings.equals(that.proxySettings)
-            && Objects.equals(disableChunkedEncoding, that.disableChunkedEncoding)
+            && disableChunkedEncoding == that.disableChunkedEncoding
             && Objects.equals(region, that.region)
             && Objects.equals(signerOverride, that.signerOverride)
             && Objects.equals(irsaCredentials, that.irsaCredentials);
@@ -698,6 +700,7 @@ public int hashCode() {
             connectionTimeoutMillis,
             connectionTTLMillis,
             maxConnections,
+            maxSyncConnections,                  // fixed here
             connectionAcquisitionTimeoutMillis,
             maxRetries,
             throttleRetries,
diff --git a/plugins/repository-s3/src/main/java/org/opensearch/repositories/s3/S3RepositoryPlugin.java b/plugins/repository-s3/src/main/java/org/opensearch/repositories/s3/S3RepositoryPlugin.java
index 4b5510ad70186..d78f9c33256d4 100644
--- a/plugins/repository-s3/src/main/java/org/opensearch/repositories/s3/S3RepositoryPlugin.java
+++ b/plugins/repository-s3/src/main/java/org/opensearch/repositories/s3/S3RepositoryPlugin.java
@@ -345,7 +345,7 @@ public Map<String, Repository.Factory> getRepositories(
     @Override
     public List<Setting<?>> getSettings() {
         return Arrays.asList(
-            // named s3 client configuration settings
+            // s3 client configuration settings
             S3ClientSettings.ACCESS_KEY_SETTING,
             S3ClientSettings.SECRET_KEY_SETTING,
             S3ClientSettings.SESSION_TOKEN_SETTING,
@@ -363,6 +363,17 @@ public List<Setting<?>> getSettings() {
             S3Repository.ACCESS_KEY_SETTING,
             S3Repository.SECRET_KEY_SETTING,
             S3ClientSettings.SIGNER_OVERRIDE,
+
+            // additional s3 client configuration settings added in this PR
+            S3ClientSettings.REQUEST_TIMEOUT_SETTING,
+            S3ClientSettings.CONNECTION_TIMEOUT_SETTING,
+            S3ClientSettings.CONNECTION_TTL_SETTING,
+            S3ClientSettings.MAX_CONNECTIONS_SETTING,
+            S3ClientSettings.MAX_SYNC_CONNECTIONS_SETTING,
+            S3ClientSettings.CONNECTION_ACQUISITION_TIMEOUT,
+            S3ClientSettings.MAX_PENDING_CONNECTION_ACQUIRES,
+            S3ClientSettings.DISABLE_CHUNKED_ENCODING,
+
             S3ClientSettings.REGION,
             S3ClientSettings.ROLE_ARN_SETTING,
             S3ClientSettings.IDENTITY_TOKEN_FILE_SETTING,
@@ -378,6 +389,7 @@ public List<Setting<?>> getSettings() {
         );
     }
 
+
     @Override
     public void reload(Settings settings) {
         // secure settings should be readable
diff --git a/plugins/repository-s3/src/test/java/org/opensearch/repositories/s3/S3RepositoryPluginTests.java b/plugins/repository-s3/src/test/java/org/opensearch/repositories/s3/S3RepositoryPluginTests.java
index 799cbe90103e5..91e8bc5ef36f5 100644
--- a/plugins/repository-s3/src/test/java/org/opensearch/repositories/s3/S3RepositoryPluginTests.java
+++ b/plugins/repository-s3/src/test/java/org/opensearch/repositories/s3/S3RepositoryPluginTests.java
@@ -75,6 +75,17 @@ public void testGetExecutorBuilders() throws IOException {
                 );
             }
             assertTrue(plugin.getSettings().contains(S3Repository.S3_ASYNC_HTTP_CLIENT_TYPE));
+            // New assertion for your bug fix
+            assertTrue(plugin.getSettings().contains(S3ClientSettings.DISABLE_CHUNKED_ENCODING));
+            // settings added to expose missing s3.client.* configs
+            assertTrue(plugin.getSettings().contains(S3ClientSettings.REQUEST_TIMEOUT_SETTING));
+            assertTrue(plugin.getSettings().contains(S3ClientSettings.CONNECTION_TIMEOUT_SETTING));
+            assertTrue(plugin.getSettings().contains(S3ClientSettings.CONNECTION_TTL_SETTING));
+            assertTrue(plugin.getSettings().contains(S3ClientSettings.MAX_CONNECTIONS_SETTING));
+            assertTrue(plugin.getSettings().contains(S3ClientSettings.MAX_SYNC_CONNECTIONS_SETTING));
+            assertTrue(plugin.getSettings().contains(S3ClientSettings.CONNECTION_ACQUISITION_TIMEOUT));
+            assertTrue(plugin.getSettings().contains(S3ClientSettings.MAX_PENDING_CONNECTION_ACQUIRES));
+
         } finally {
             if (threadPool != null) {
                 terminate(threadPool);