diff --git a/autoware_launch/launch/planning_simulator.launch.xml b/autoware_launch/launch/planning_simulator.launch.xml
index 5910b5f858..bc601cb30f 100644
--- a/autoware_launch/launch/planning_simulator.launch.xml
+++ b/autoware_launch/launch/planning_simulator.launch.xml
@@ -41,7 +41,7 @@
   <!-- Localization-->
   <arg
     name="localization_sim_mode"
-    default="pose_twist_estimator"
+    default="api"
     description="Select localization mode. Options are 'none', 'api' or 'pose_twist_estimator'. 'pose_twist_estimator' starts most of the localization modules except for the ndt_scan_matcher. 'api' starts an external API for initial position estimation. 'none' does not start any localization-related process."
   />