Is power steering fluid and brake fluid the same thing

However, you should not use power steering fluid in the braking system because it may cause problems with applying the brakes to stop the car, and the rubber seals and tubes would erode eventually when introduced to power steering fluid. There could also be heat transfer problems.

The most common mistake is adding power steering fluid to the brakes. Power steering fluid contamination will cause seals to immediately begin swelling. As the seals swell, they move forward and block the passages that allow the brake system to function. One example is the return ports in the brake master-cylinder.

Automatic transmission fluid (ATF) is the same fluid used inside the automatic transmission. ATF can also be used in some power steering systems.