Use a funnel to prevent spills.
Flush power steering fluid as part of your vehicle’s regular maintenance. By removing the old, contaminated fluid and replacing it with new power steering fluid, you ensure that your steering system is well lubricated.
Not all cars use the same type of power steering fluid. This article walks you through your options. We also evaluate the average cost and discuss what other jobs can be done at the same time.
Types of Power Steering Fluid
OEM power steering fluid is a safe bet, but it will likely cost more than aftermarket alternatives.
There are two main power steering fluid types. Consult your owner’s manual to confirm the type used by your vehicle.
Red:
Most of the time, power steering fluid is red. Red power steering fluid is similar but not identical to automatic transmission fluid (ATF). It’s designed for higher pressure.
Green:
Other vehicles rely on green fluid, which is central hydraulic fluid (CHF). This is more costly because it’s synthetic, which is generally considered to provide better protection in high-performance driving and to better handle changes in temperature.
Consider these other factors:
OEM vs. aftermarket:
You can buy manufacturer-branded fluid that’s exactly what’s recommended by the manufacturer. This is called original equipment manufacturer (OEM) fluid. These are often more expensive than what’s sold by aftermarket companies. In most cases, it’s acceptable to save money with an aftermarket brand.
Additives:
Some fluids include additives that extend their life or further protect the power steering components. They aren’t always necessary, but fluid with seal conditioners that rejuvenate the rubber seals provides additional protection.
Amount
: Before you start the flush, make sure you have enough fluid to get the job done. Some cars only need one quart. Check your owner’s manual for the correct amount.
What happens if you use the wrong power steering fluid?
Power steering fluids are not always interchangeable. Use only what your owner’s manual indicates. If you use the wrong type, it could damage pumps, seals, and other rubber components. You may also notice reduced steering performance or a stiffer steering wheel. What’s worse is that you could void your warranty.
Power Steering Fluid Cost
It’s acceptable to save money with an aftermarket brand of power steering fluid.
The average power steering fluid cost is between $5 and $15 per quart, depending on your vehicle. If you are buying fluid branded by your carmaker, the price could increase to around $20. Double that amount if you have a European luxury car.
Mechanics often charge between $90 and $150, plus the cost of fluid, to perform a power steering flush. You can save labor costs by doing this easy DIY job.
Should you do a complete fluid flush?
It isn’t always necessary to flush the power steering fluid. This job adds another step between draining and refilling to push clean fluid through the system and remove any remaining debris. To determine whether you should simply change the fluid or flush it, read your repair manual. If there’s no mention of flushing, then a power steering fluid drain and refill is all that’s needed. However, if you have problems with the power steering, add the extra step of flushing the system to ensure the system is clean.
Parts and Tools Related to a Power Steering Flush
When flushing the power steering system, we recommend that you perform a complete inspection of the power steering system. Start by looking for signs of hose leaks and wear. If they need to be replaced, it’s ideal to do so when the system is already drained. It’s also good to check for leaks in the seals.
If you have power steering troubles, take a deeper look at the various components. Inspect the power steering pump, which might groan when it's failing. Many symptoms of a bad pump and contaminated fluid are the same.
Also, look at the power steering rack and pinion (or steering gearbox) for signs of wear. Replace the drive belt before it breaks. This is what runs the power steering system.
For a DIY power steering flush, you only need basic equipment, such as a floor jack, jack stands, and a drain pan. To flush the fluid, drain the system of all fluid, flush it with fresh fluid, and drain it again before filling it up a final time. Having a friend can make this process go much faster.
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This article is meant to provide general guidance only. Automotive maintenance, repair, upgrade, and installation may depend on vehicle-specifics such as make and model. Always consult your owner's manual, repair guide for specific information for your particular vehicle and consider a licensed auto-care professional's help as well, particularly for advance repairs.