If you're looking for anime similar to Tayo the Little Bus 3, you might like these titles.
While investigating a string of mysterious car accidents, Dr. Franklin Char is abducted by the perpetrators. This incident activates his creations called "Tobots", cars that transform into robots with a special key called a "Tokey". Dr. Char's first two Tobots, Tobot X and Tobot Y, are entrusted to his twin sons Ryan and Kory, respectively, to fight crime and protect their neighborhood.
In the near future, high-tech AI toy cars for kids, Watch-Cars, are created. In burst enthusiasm, a battle tournament is formed, the Watch Car Battle League. As the undefeated champion, Kai remains a legend. Jino and his watch-car Bluewill hope to become the new league champions. Meanwhile, the evil organization Shadow attempts to eliminate Watch-Cars with their Monster Cars.
Jett, Dizzy, Donnie and Jerome add more exciting destinations to their delivery list, flying to Hong Kong, Dubai, Austria, Cuba and more.