diff --git a/chromium_src/components/search_engines/brave_template_url_prepopulate_data_unittest.cc b/chromium_src/components/search_engines/brave_template_url_prepopulate_data_unittest.cc
index be0339ce13eb..6caf3987c5a1 100644
--- a/chromium_src/components/search_engines/brave_template_url_prepopulate_data_unittest.cc
+++ b/chromium_src/components/search_engines/brave_template_url_prepopulate_data_unittest.cc
@@ -186,7 +186,7 @@ TEST_F(BraveTemplateURLPrepopulateDataTest, DefaultSearchProvidersForCanada) {
 
 TEST_F(BraveTemplateURLPrepopulateDataTest,
        DefaultSearchProvidersForAustralia) {
-  CheckForCountry('A', 'U', PREPOPULATED_ENGINE_ID_GOOGLE);
+  CheckForCountry('A', 'U', PREPOPULATED_ENGINE_ID_BRAVE);
 }
 
 TEST_F(BraveTemplateURLPrepopulateDataTest,
diff --git a/chromium_src/components/search_engines/template_url_prepopulate_data.cc b/chromium_src/components/search_engines/template_url_prepopulate_data.cc
index 8a2c420f5e76..7f95b19b513d 100644
--- a/chromium_src/components/search_engines/template_url_prepopulate_data.cc
+++ b/chromium_src/components/search_engines/template_url_prepopulate_data.cc
@@ -521,8 +521,66 @@ BravePrepopulatedEngineID GetDefaultSearchEngine(int country_id, int version) {
           {country_codes::CountryCharsToCountryID('U', 'Z'),
            PREPOPULATED_ENGINE_ID_YANDEX},
       });
+  // Updated default for AU.
+  static constexpr auto kContentV30 =
+      base::MakeFixedFlatMap<int, BravePrepopulatedEngineID>({
+          {country_codes::CountryCharsToCountryID('A', 'M'),
+           PREPOPULATED_ENGINE_ID_YANDEX},
+          {country_codes::CountryCharsToCountryID('A', 'R'),
+           PREPOPULATED_ENGINE_ID_BRAVE},
+          {country_codes::CountryCharsToCountryID('A', 'T'),
+           PREPOPULATED_ENGINE_ID_BRAVE},
+          {country_codes::CountryCharsToCountryID('A', 'U'),
+           PREPOPULATED_ENGINE_ID_BRAVE},
+          {country_codes::CountryCharsToCountryID('A', 'Z'),
+           PREPOPULATED_ENGINE_ID_YANDEX},
+          {country_codes::CountryCharsToCountryID('B', 'R'),
+           PREPOPULATED_ENGINE_ID_BRAVE},
+          {country_codes::CountryCharsToCountryID('B', 'Y'),
+           PREPOPULATED_ENGINE_ID_YANDEX},
+          {country_codes::CountryCharsToCountryID('C', 'A'),
+           PREPOPULATED_ENGINE_ID_BRAVE},
+          {country_codes::CountryCharsToCountryID('D', 'E'),
+           PREPOPULATED_ENGINE_ID_BRAVE},
+          {country_codes::CountryCharsToCountryID('E', 'S'),
+           PREPOPULATED_ENGINE_ID_BRAVE},
+          {country_codes::CountryCharsToCountryID('F', 'R'),
+           PREPOPULATED_ENGINE_ID_BRAVE},
+          {country_codes::CountryCharsToCountryID('G', 'B'),
+           PREPOPULATED_ENGINE_ID_BRAVE},
+          {country_codes::CountryCharsToCountryID('I', 'N'),
+           PREPOPULATED_ENGINE_ID_BRAVE},
+          {country_codes::CountryCharsToCountryID('I', 'T'),
+           PREPOPULATED_ENGINE_ID_BRAVE},
+          {country_codes::CountryCharsToCountryID('K', 'G'),
+           PREPOPULATED_ENGINE_ID_YANDEX},
+          {country_codes::CountryCharsToCountryID('K', 'R'),
+           PREPOPULATED_ENGINE_ID_NAVER},
+          {country_codes::CountryCharsToCountryID('K', 'Z'),
+           PREPOPULATED_ENGINE_ID_YANDEX},
+          {country_codes::CountryCharsToCountryID('M', 'D'),
+           PREPOPULATED_ENGINE_ID_YANDEX},
+          {country_codes::CountryCharsToCountryID('M', 'X'),
+           PREPOPULATED_ENGINE_ID_BRAVE},
+          {country_codes::CountryCharsToCountryID('R', 'U'),
+           PREPOPULATED_ENGINE_ID_YANDEX},
+          {country_codes::CountryCharsToCountryID('T', 'J'),
+           PREPOPULATED_ENGINE_ID_YANDEX},
+          {country_codes::CountryCharsToCountryID('T', 'M'),
+           PREPOPULATED_ENGINE_ID_YANDEX},
+          {country_codes::CountryCharsToCountryID('U', 'S'),
+           PREPOPULATED_ENGINE_ID_BRAVE},
+          {country_codes::CountryCharsToCountryID('U', 'Z'),
+           PREPOPULATED_ENGINE_ID_YANDEX},
+      });
 
-  if (version > 25) {
+  if (version > 29) {
+    const auto it = kContentV30.find(country_id);
+    if (it == kContentV30.end()) {
+      return default_v6;
+    }
+    return it->second;
+  } else if (version > 25) {
     const auto it = kContentV26.find(country_id);
     if (it == kContentV26.end()) {
       return default_v6;
diff --git a/components/search_engines/brave_prepopulated_engines.cc b/components/search_engines/brave_prepopulated_engines.cc
index 659946e7e793..4a0daa7ebf8b 100644
--- a/components/search_engines/brave_prepopulated_engines.cc
+++ b/components/search_engines/brave_prepopulated_engines.cc
@@ -13,7 +13,7 @@ namespace TemplateURLPrepopulateData {
 
 // IMPORTANT! Make sure to bump this value if you make changes to the
 // engines below or add/remove engines.
-const int kBraveCurrentDataVersion = 29;
+const int kBraveCurrentDataVersion = 30;
 
 // The version is important to increment because Chromium will cache the list
 // of search engines that are shown. When the version is incremented, Chromium