When did all cars come with windshield washers?

There's no single year when *all* cars suddenly came equipped with windshield washers. The adoption was gradual, starting with higher-end models and slowly becoming standard across the industry. While some early examples existed, it wasn't until the 1960s and 1970s that windshield washers became truly commonplace in most cars, particularly in North America and Europe. Even then, the transition wasn't instantaneous. Some budget models might have lagged behind for a few years.