What happens if I dont change my power steering fluid?

In short: neglecting power steering fluid changes can lead to harder, noisier steering and progressive damage to the steering pump and seals.

Power steering fluid lubricates the hydraulic pump, cushions and protects seals, and helps transmit hydraulic pressure. Over time heat, moisture, and contaminants break it down, turning it dark and sludgy and reducing performance. Maintenance intervals vary by vehicle, so always consult the owner's manual, but ignoring changes increases the risk of failures and costly repairs. If you notice symptoms, have the system inspected promptly by a trained technician.

Why power steering fluid degrades

Over time the fluid loses its protective properties due to heat, oxidation, moisture, and contaminants. This can lead to corrosion, seal damage, and reduced efficiency of the hydraulic system.

• Heat and oxidation cause the fluid to break down and lose lubricating qualities


• Moisture enters the system and can lead to corrosion and slime formation


• Contaminants from wear, leaks, or the environment accumulate


• Air bubbles can form, causing foaming and inconsistent pressure


• Sludge and varnish build up, clogging passages and reducing flow

Regular fluid changes help prevent these problems and preserve system integrity.

What happens to the system if you skip maintenance

As the fluid degrades, you may notice symptoms that indicate the hydraulic system is struggling. These issues can progress from annoying to dangerous if not addressed promptly.

• Whining, groaning, or squealing noises from the power steering pump


• Stiff, heavy, or inconsistent steering, especially at low speeds


• Discolored, dark, or burnt-smelling fluid in the reservoir


• Increased steering effort or degraded steering feel


• Leaks around seals or hoses due to swollen or worn seals


• Foaming or air bubbles in the reservoir indicating air in the system


• Potential damage to the pump, steering rack, hoses, or seals requiring costly repairs

These symptoms should prompt an inspection and likely a fluid change or system service.

Maintenance and best practices

To keep the power steering system healthy, observe maintenance guidelines and service appropriately. Intervals and methods vary by vehicle, so rely on manufacturer guidance and a trusted technician.

• Check the owner's manual for the recommended interval and fluid specification


• Use the correct power steering fluid type; do not mix fluids unless the manual allows it


• Consider a full flush versus simple top-offs based on system cleanliness and technician advice


• Address leaks promptly to avoid low fluid levels and pump damage


• Be mindful of driving conditions: hot climates, towing, or heavy stop-and-go driving may necessitate earlier service


• Budget for service costs, which typically range from moderate to higher depending on vehicle and location

Professional service ensures proper bleeding of air and verification of system operation after the change.

Is a "lifetime" or sealed system a guarantee?

Some modern vehicles market "lifetime" power steering fluid or sealed systems that require less frequent servicing. In practice, these fluids can still degrade under heat and age, and many technicians recommend periodic inspection and change if the fluid appears degraded or the vehicle exhibits symptoms. Always follow the manufacturer’s guidance and rely on diagnostics rather than marketing language.

When in doubt, consult a qualified technician to assess whether a fluid change is appropriate for your vehicle and driving conditions.

Summary

Power steering fluid is essential for smooth, safe steering. Neglecting changes can lead to noisier operation, stiffer steering, leaks, and eventually expensive component damage. Regular checks, using the correct fluid, and timely service—guided by your vehicle’s manual and a trusted mechanic—help protect the hydraulic system and ensure reliable steering performance.

What happens if I don't replace power steering fluid?

Over time, the fluid will break down and become contaminated with particles. This could harm the pump and other parts of the steering system. Replacing the fluid and getting a power steering flush will help prevent these issues from occurring and affecting the car's performance.

How often does power steering fluid have to be changed?

You should change your power steering fluid every 75,000 to 100,000 miles or every two to five years, but always check your owner's manual for the specific recommendation for your vehicle. A more frequent change, such as every two years, is a good idea for many cars. You should also change the fluid immediately if you notice dark or dirty fluid, or signs of problems like whining noises when turning or difficulty steering. 
This video explains why changing power steering fluid is important and shows the difference between new and old fluid: 59sScotty KilmerYouTube · Feb 14, 2022
Why change power steering fluid?

• To prevent damage: Over time, the fluid can become dirty and abrasive, which can damage internal seals, the pump, and the steering rack. 
• To avoid leaks: Dirty fluid can cause seals to degrade, leading to leaks and expensive repairs. 
• To maintain performance: Old fluid can cause a "tight" or "stiff" feeling when steering, and the system may make whining noises. 

Signs that you need to change your power steering fluid

• Dark or dirty fluid: New power steering fluid is typically clear or light yellow and turns dark or reddish over time. 
• Whining or groaning noises: A whining sound when turning the steering wheel can indicate low or old fluid. 
• Difficulty steering: If the steering wheel feels stiff or hard to turn, it's a sign the fluid needs to be changed or there is a leak. 
• Leaks under the car: Seeing reddish fluid leaking under your car can be a sign of a power steering fluid leak. 

How often should you change it?

• Normal driving: Every 75,000 to 100,000 miles or every two to five years is a good general guideline. 
• Severe conditions: If you drive in tough conditions (like off-roading or racing), you may need to change it as often as every 30,000 miles. 
• Check the manual: The most accurate interval is specified in your vehicle's owner's manual, which is the best place to start. 
• Check during oil changes: You can also inspect the fluid's color at every oil change. If it's dark, it's time to have it changed. 

You can watch this video to learn how to check your power steering fluid level and condition: 1:00gillspointstireTikTok · Apr 10, 2025

What happens when power steering fluid gets old?

If the fluid gets old, contaminated, or low, it can lead to serious problems like stiff steering, strange noises, or even system failure. Skipping a power steering fluid replacement can cause the fluid to break down and lose its effectiveness.

Is a power steering fluid flush really necessary?

Yes, you need to flush power steering fluid to remove contaminants and keep the system working properly. Flushing the fluid prevents damage to the steering pump and other components, extends the life of the system, and ensures smooth steering. It's recommended to flush it periodically, and you should check your owner's manual for specific intervals and any warnings. 
Benefits of flushing power steering fluid 
You can watch this video to learn how to change power steering fluid: 55sClassic Car MaintenanceYouTube · Jun 20, 2025

• Removes contaminants: Over time, power steering fluid becomes dirty, which can cause wear and damage to the system. 
• Extends system life: Regularly flushing the fluid helps prevent costly repairs to the power steering pump and other components. 
• Improves performance: A flush results in smoother, more responsive steering, making it safer and more enjoyable to drive. 
• Prevents damage: Contaminated fluid can cause the pump to work harder, leading to premature wear and potential failure. 

Signs that you need a flush

• Dark, dirty, or burnt-smelling fluid in the reservoir
• Noises when turning the steering wheel
• Difficulty steering or a sluggish feel when turning
• Leaking fluid 

This video demonstrates the signs of bad power steering fluid: 55sChrisFixYouTube · May 2, 2014
How often to flush

• Your owner's manual is the best source for the recommended service interval. 
• A general guideline is every 50,000 miles, but this can vary significantly by vehicle and driving conditions. 

Important considerations

• Modern systems: Some modern cars have electric power steering and do not use hydraulic fluid, so check if your vehicle has a power steering fluid reservoir before looking for it, notes a YouTube video. 
• Honest mechanics: While flushing is beneficial, be aware that some shops may recommend unnecessary services. Always consult your owner's manual to determine if a flush is needed based on your car's requirements, says RepairPal.