diff --git a/sensing/imu_corrector/package.xml b/sensing/imu_corrector/package.xml
index 420f9b66ee94f..25ab1f75340ce 100644
--- a/sensing/imu_corrector/package.xml
+++ b/sensing/imu_corrector/package.xml
@@ -15,6 +15,7 @@
   <depend>rclcpp</depend>
   <depend>rclcpp_components</depend>
   <depend>sensor_msgs</depend>
+  <depend>tier4_autoware_utils</depend>
 
   <test_depend>ament_lint_auto</test_depend>
   <test_depend>autoware_lint_common</test_depend>
diff --git a/sensing/imu_corrector/src/imu_corrector_core.cpp b/sensing/imu_corrector/src/imu_corrector_core.cpp
index 79a44fc2ca12a..d19b0da7d9387 100644
--- a/sensing/imu_corrector/src/imu_corrector_core.cpp
+++ b/sensing/imu_corrector/src/imu_corrector_core.cpp
@@ -14,6 +14,8 @@
 
 #include "imu_corrector/imu_corrector_core.hpp"
 
+#include "tier4_autoware_utils/tier4_autoware_utils.hpp"
+
 namespace imu_corrector
 {
 ImuCorrector::ImuCorrector(const rclcpp::NodeOptions & node_options)
@@ -42,11 +44,12 @@ void ImuCorrector::callbackImu(const sensor_msgs::msg::Imu::ConstSharedPtr imu_m
   imu_msg.angular_velocity.y -= angular_velocity_offset_y_;
   imu_msg.angular_velocity.z -= angular_velocity_offset_z_;
 
-  imu_msg.angular_velocity_covariance[0 * 3 + 0] =
+  using IDX = tier4_autoware_utils::xyz_covariance_index::XYZ_COV_IDX;
+  imu_msg.angular_velocity_covariance[IDX::X_X] =
     angular_velocity_stddev_xx_ * angular_velocity_stddev_xx_;
-  imu_msg.angular_velocity_covariance[1 * 3 + 1] =
+  imu_msg.angular_velocity_covariance[IDX::Y_Y] =
     angular_velocity_stddev_yy_ * angular_velocity_stddev_yy_;
-  imu_msg.angular_velocity_covariance[2 * 3 + 2] =
+  imu_msg.angular_velocity_covariance[IDX::Z_Z] =
     angular_velocity_stddev_zz_ * angular_velocity_stddev_zz_;
 
   imu_pub_->publish(imu_msg);