One of the most common questions we hear is, "Do I really need to flush my power steering fluid?"
There has been plenty of debate over the years. Some drivers believe power steering fluid lasts the life of the vehicle, while others assume it's not an important maintenance item. Although older vehicles often didn't include power steering fluid service in their maintenance schedules, modern power steering systems are much more precise and expensive to repair.
The truth is, regularly servicing your power steering system can help prevent costly repairs and keep your steering smooth and responsive.
What Does Power Steering Fluid Do?
Power steering fluid is a hydraulic fluid that provides the pressure needed to help you steer your vehicle with minimal effort. Every time you turn the steering wheel, the fluid flows through the power steering pump, hoses, and steering rack (or rack and pinion), helping move the steering components.
Without clean, properly functioning fluid, the entire system has to work harder.
Why Does Power Steering Fluid Need to Be Replaced?
Just like engine oil, transmission fluid, and brake fluid, power steering fluid doesn't stay clean forever.
Over time, the fluid becomes contaminated with:
- Metal particles from normal component wear
- Rubber debris from seals and O-rings
- Dirt and moisture
- Oxidized fluid caused by heat
As these contaminants circulate through the system, they can begin wearing down expensive components.
Dirty fluid forces the power steering pump to work harder, increasing friction and heat while reducing lubrication. Eventually, this extra strain can lead to premature pump failure or damage to the steering rack.
Signs Your Power Steering Fluid May Need Service
If your power steering fluid has become contaminated, you may notice:
- Whining or groaning noises when turning the wheel
- Stiff or difficult steering
- Jerky steering feel
- Discolored or dark brown fluid instead of clear or reddish fluid
- Small power steering fluid leaks
- Steering that feels inconsistent
Even if you don't notice any symptoms, contaminated fluid may still be causing wear inside the system.
A Flush Is Much Less Expensive Than a Repair
Replacing power steering fluid is considered preventative maintenance.
Compared to replacing a power steering pump, steering rack, or hydraulic lines, a fluid flush is a relatively inexpensive service that can help extend the life of your steering system.
Think of it this way—it's much more affordable to replace the fluid than to replace the components that rely on it.
How Often Should Power Steering Fluid Be Flushed?
Every manufacturer has different maintenance recommendations. Some vehicles include power steering service intervals in the owner's manual, while others simply recommend inspecting the fluid periodically.
As a general guideline, many technicians recommend inspecting the fluid at every oil change and considering a flush approximately every 50,000 to 75,000 miles, depending on your driving habits and the manufacturer's recommendations.
Vehicles that frequently tow, drive in mountainous terrain, or experience stop-and-go traffic may benefit from more frequent service.
Always use the manufacturer-specified power steering fluid. Different systems require different fluid formulations, and using the wrong type can lead to poor performance or damage to the system.
Electric Power Steering vs. Hydraulic Power Steering
Many newer vehicles now use Electric Power Steering (EPS) instead of a hydraulic system.
Electric power steering systems do not use power steering fluid, so they don't require fluid flushes. However, many vehicles on the road today still use hydraulic power steering, making fluid maintenance an important part of protecting those systems.
If you're unsure which type your vehicle has, our team can help identify your steering system and recommend the appropriate maintenance.
Protect Your Steering System
Power steering fluid may not get as much attention as engine oil or transmission fluid, but it plays a critical role in keeping your vehicle safe and easy to drive.
Regular inspections and fluid service can help:
- Extend the life of your power steering pump
- Protect the steering rack and hydraulic components
- Maintain smooth steering performance
- Reduce the risk of expensive repairs
At Dickerson Automotive, we inspect your steering system during your vehicle's maintenance visits and can recommend power steering fluid service based on your vehicle's manufacturer guidelines and the condition of your fluid. Our goal is to help you avoid costly repairs and keep your vehicle steering smoothly for years to come.