When did power steering first become available on cars?

The first power steering system on a vehicle was apparently installed in 1876 by a man with the surname of Fitts, but little else is known about him.[1] The next power steering system was put on a Columbia 5-ton truck in 1903 where a separate electric motor was used to assist the driver in turning the front wheels.

https://en.wikipedia.org/wiki/Power_steering

Power steering didn't become common until 1960s.

It was patented in 1900 but was an option on cars until the 1960s.

That's a basic Google question.