Power Steering Fluid change & replacement made easy

How does power steering fluid work?

Power steering fluid is a special hydraulic liquid that plays a vital role in vehicles equipped with power-assisted steering. It works with the power steering pump to create the pressure needed to help you turn the steering wheel smoothly and with less effort.
As you steer, the power steering fluid flows through the system and helps transfer the force from the steering wheel to the wheels themselves. This makes manoeuvring, especially at low speeds or when parking, much easier than with manual steering.
Without clean and properly functioning fluid, the steering system would feel heavy, unresponsive, or even noisy. That’s why maintaining the right level and condition of power steering fluid is essential for safe, comfortable driving.

What does a power steering fluid change job involve?

An experienced mechanic will follow this general process to ensure your power steering system remains responsive and efficient:
The mechanic inspects the current power steering fluid for signs of low level, dark color, or contamination.

Using specialised equipment, the mechanic drains the reservoir or flushes fluid through the return line to clear out as much of the old fluid as possible.

If the fluid is especially dirty, the system may be flushed so that only clean fluid remains inside the lines and steering components.

The reservoir is topped up with the manufacturer-recommended power steering fluid (or automatic transmission fluid if specified for your vehicle).

To remove any trapped air, the mechanic cycles the steering wheel from lock to lock until the fluid flows smoothly.

The mechanic rechecks the fluid level, inspects for leaks, and tests the steering to make sure it feels consistent and responsive.

How do I know when I need a power steering fluid change?

If you're experiencing issues with your steering, it may be time to check your power steering fluid. Here are some clear signs that your fluid might need a change:

• Heavier Steering: If your steering wheel feels noticeably heavier than usual, it could indicate that the power steering fluid is no longer providing adequate lubrication.
• Unusual Noises: Squeaking or grinding sounds when turning the wheel are often a sign that the fluid is contaminated or low, affecting the system’s performance.
• Fluid Appearance: You can also inspect the fluid by removing the reservoir cap (look for the picture of a steering wheel on it). If the fluid appears clear or bright (commonly green or redd, amber, pink, or even clear, depending on the manufacturer), it’s likely in good condition. However, if you notice a brown or black color, it usually means the fluid has been contaminated and should be replaced.

If you notice any of these symptoms, it’s a good idea to have your power steering system inspected. Replacing old, contaminated fluid can help restore smooth, responsive steering and prolong the life of your components.

How often do I need to change my power steering fluid?

Most manufacturers recommend changing the power steering fluid every 50,000 miles or 5-7 years, but this can vary depending on your vehicle's make and model. If you regularly drive in stop-start traffic, extreme heat, or other tough conditions, you may need to change it more frequently. To be sure, it’s best to refer to your car’s handbook for specific guidance on when to change the fluid.

Can I refill the power steering fluid myself?

Topping up the power steering fluid can be straightforward task and can be done at home only if you’re confident with basic car maintenance. It usually involves siphoning out the old fluid, topping up with new fluid, and turning the steering wheel a few times to help circulate it through the system.
However, it’s worth noting that not all cars are the same. Some models require specific fluids or extra steps to avoid introducing air into the system. If the job isn’t done properly, you could end up with noisy steering or even damage to the power steering pump.
That’s why many drivers prefer to have a professional handle it for them. A mobile mechanic can come to you and carry out a power steering fluid change safely and efficiently, whether you’re at home or work, saving you time and hassle while ensuring the job’s done right.

Is power steering fluid the same as brake fluid?

No, power steering fluid and brake fluid are not the same, and they should never be used interchangeably.

Power steering fluid is a type of hydraulic fluid designed to lubricate and protect the steering pump, rack, and other components. On the other hand, brake fluid is a different type of hydraulic fluid designed to handle extremely high heat and pressure in the braking system. It’s also corrosive and formulated to work with rubber seals in brake lines and calipers.

On forums, drivers have realised they’d mistakenly topped up their power steering with brake fluid, and had driven for a fair few miles after. It’s important to remember that these fluids are chemically incompatible (glycol-based vs petroleum-based), and it’s advised a complete system flush and refilling with the correct fluid to prevent damage to seals and the steering pump.

How much does a power steering fluid change cost?

A power steering fluid change typically costs between £75 and £90, with the average price being around £80. The final cost can vary depending on your vehicle make and model, as different manufacturers may recommend specific types of power steering fluid. Some vehicles also have more complex systems that may take a bit longer to service. Other factors, like your location and whether you use a mobile mechanic or a garage, can also influence the price. Use our free price estimator tool to find out what you could save by having your power steering fluid repaired by ClickMechanic!

What does a ClickMechanic power steering fluid change quote cover?

Unless otherwise stated, the quote for your PAS fluid to be replaced will cover;

• The cost of the PAS fluid
• Coming to you
• Draining, refilling, and bleeding the system
• Disposal of the old fluid
• VAT (if applicable)
• 12-month parts and labour warranty

Can a mobile mechanic change the power steering fluid?

Yes, a mobile mechanic can change your power steering fluid without the need to visit a garage. This is a fairly routine job that can be carried out safely at your home or workplace as long as there’s enough space and a stable surface to work on. Using a mobile mechanic means you get the convenience of professional service brought to you, often at a lower cost than visiting a garage. It’s a simple and efficient way to stay on top of essential vehicle maintenance.