Power-steering fluid, like any other fluid under your hood, breaks down over time and needs to be replaced. As a rule of thumb, it is a good idea to replace the power-steering fluid every time you change your engine's coolant. While most manufacturers don't specify how often power-steering fluid should be changed, it is a good idea to check the fluid every so often and replace it when you note a color change (darkening from a pinkish color). Difficulty:Moderate Things You'll Need Fluid removal/transfer tool Power steering fluid Funnel 1 Removing the cap under your hood marked "power steering fluid" and inspect the fluid on the attached dip stick. If the fluid is light brown, it is time to change it. If the fluid looks clean and is pinkish, there is no need to change it. 2 Insert the fluid removal/transfer tool into the open power-steering reservoir and suck out as much fluid as possible. Continue until the reservoir is empty. 3 Refill the reservoi