Can NOT remember a movie for the life of me:?

This is NOT "Home Alone" This movie was waaaaaaaaay before then. It was done in the 1970 s or early 1980s, but well before 1982. (I want to say that I was watching it sometime between 73 and 75.) It was about a boy who had a toy car, and some spies put a chip in it and wanted it back. They actually nabbed his car to put the chip in it, then gave it back to him when he wasn t looking. This was not a switch-a-roo as in "Home alone" where they accidentally switched bags. This young man was on the run, but wasn t fighting back, like Home Alone. He was more of hiding and running. He found a girl to help him after he got separated from his parents who would not believe him. That is about all that I do remember about this movie--and it is driving me nuts.