How often do you change the power steering fluid on a Lexus?

Power steering fluid maintenance in a Lexus depends on whether the car uses electric power steering (EPS) or hydraulic power steering (HPS). If your model uses EPS, there is no fluid to change. If it uses hydraulic steering, the service interval varies by model and year, and you should follow the owner’s manual or consult a Lexus technician for the exact recommendation. A common preventative window cited in some shops is roughly 60,000 to 100,000 miles, but always verify for your specific vehicle.

Understanding the two power steering systems used by Lexus

Lexus vehicles can be equipped with either electric power steering, which provides assist via an electric motor, or traditional hydraulic power steering, which uses pressurized fluid to assist steering. Because EPS does not use fluid, there is no routine fluid change. HPS, on the other hand, uses automatic transmission fluid (ATF) and has a service interval that varies by model and year.

Electric power steering (EPS)

There is no power steering fluid reservoir or routine fluid change for EPS systems. Maintenance focuses on the electrical system, belt condition, battery health, and steering mechanism. If you notice warning lights, loss of assist, or abnormal steering feel, have the system diagnosed by a technician.

Hydraulic power steering

Hydraulic systems use ATF as the steering fluid. The exact service interval is not universally fixed in Toyota/Lexus manuals; many technicians recommend inspecting the fluid around 60,000–100,000 miles and changing it if it shows contamination or degradation. Always use the exact OEM-spec ATF (for Lexus, this is often ATF WS, but check your manual) and avoid mixing fluids. If uncertain, consult your dealer for the recommended interval and fluid type for your model/year.

Maintenance guidelines and practical steps

The following guidance helps you decide when to service and how to proceed with a fluid change, if needed.

• Signs that a fluid change may be warranted include dark, burnt-smelling fluid, a squealing or groaning steering pump, increased steering effort, or visible leaks around the power steering lines or reservoir.

Always verify the correct ATF specification for your Lexus model and year, and never mix different ATF types in the system. If you decide to have the fluid changed, a complete flush and refill is preferred for hydraulic PS; a top-off alone is not sufficient if the fluid is degraded.

In practice, if you own a model with EPS you can skip fluid-change scheduling entirely; for hydraulic systems, follow the model-specific interval and have the service performed by a qualified technician to avoid introducing air into the system or using the wrong fluid.

What to do next

To ensure accuracy for your exact Lexus model, check the owner’s manual or contact a Lexus service center. Ask for the recommended ATF type (often ATF WS) and the service interval for your year and model, and have the system inspected if you notice any steering or fluid issues.

Summary

Summary: Lexus power steering maintenance hinges on the system type. EPS requires no routine fluid change, while hydraulic systems may need a fluid change at a model-specific interval—often discussed in the range of 60,000–100,000 miles or when signs of deterioration appear. Always use the correct ATF and follow the manufacturer’s guidance for your exact vehicle.

How much should it cost to change power steering fluid?

A professional power steering fluid change costs approximately $90 to $200, depending on the vehicle, location, and shop rates. Doing it yourself can significantly reduce the cost, with the fluid itself typically costing around $10 to $30 for a quart. 
This video demonstrates how to change power steering fluid at home: 55sClassic Car MaintenanceYouTube · Jun 20, 2025
Professional service

• Average cost: Expect to pay anywhere from $90 to $200 for a professional flush, which includes parts and labor. 
• Factors that influence cost:
  • Vehicle make and model: Some cars may require more expensive, specific types of power steering fluid or have more complex systems. 
  • Labor rates: These can vary significantly based on the shop's location and whether it's a dealership or an independent mechanic. 
• What's included: A professional service will typically include a full flush of the old fluid and the cost of new, high-quality fluid. 

DIY

• Cost of parts: The main expense is the fluid itself, which can cost anywhere from $10 to $30 for a quart. 
• Cost of labor: This is free if you do it yourself. 
• Tools needed: You will need a turkey baster or a fluid extractor to remove the old fluid and a way to dispose of it properly. 
• Considerations:
  • You must buy the correct type of fluid for your vehicle's power steering system, which is not always straightforward. 
  • This is best for those who are comfortable performing car maintenance tasks. 

Is changing power steering fluid necessary?

Yes, power steering fluid needs to be changed periodically because it can become contaminated and lose its effectiveness over time, which can damage the steering system. The fluid should be changed according to your owner's manual's recommendation, or when you notice symptoms like dark or burnt-smelling fluid, difficulty steering, or whining noises when turning. 
This video explains why changing power steering fluid is important and shows how to do it: 1mScotty KilmerYouTube · Dec 19, 2017
Reasons to change power steering fluid

• Contamination: Over time, dirt, metal particles, and other contaminants can build up in the fluid, making it abrasive and less effective. 
• Component protection: Clean fluid lubricates the power steering pump, rack, and seals. Contaminated fluid can lead to premature wear and damage, potentially causing costly repairs. 
• System performance: Old fluid can make steering feel stiff or difficult, and can cause noises like whining when you turn the wheel. 

Signs that your power steering fluid needs changing

• The fluid appears dark brown or black instead of its original color (usually clear, red, or light pink). 
• You hear whining or groaning noises when you turn the steering wheel. 
• The steering wheel feels stiff or is more difficult to turn than usual. 
• The fluid has a burnt smell. 

You can watch this video to learn how to check power steering fluid: 40sClassic Car MaintenanceYouTube · Jun 20, 2025
How often to change it

• Check your vehicle's owner's manual for the manufacturer's specific recommendation, as intervals can vary. 
• A common interval is every 30,000 to 50,000 miles or every two to five years, but this can be different for your car. 
• It's especially important to change it if you plan to keep your car for a long time. 

What kind of power steering fluid does Lexus use?

Dexron® III transmission fluid is used in Lexus power-steering systems, except for electric power-steering systems.

How many years does power steering fluid last?

Power steering fluid should be changed every 40,000-50,000 miles or every two years, but this can vary depending on your vehicle, driving conditions, and the fluid type. Always check your owner's manual for specific recommendations, and replace the fluid sooner if it becomes dark, burnt-smelling, or foamy, which indicates it's degraded. 
Factors affecting fluid life

• Vehicle type: A track car with extreme use will require much more frequent fluid changes than a standard commuter car.
• Fluid type: Synthetic fluids typically last longer than conventional fluids.
• System components: Systems with coolers or filters may have longer fluid life. 

Signs it's time to change the fluid 

• Color: The fluid is a good indicator of its health. Healthy fluid is usually reddish, pink, or amber and appears clean. 
• Consistency: If the fluid looks dark brown, black, or is foamy, it's time for a change. 
• Smell: A burnt smell is a sign of degradation. 

Why it's important to change the fluid

• Prevents damage: Old, degraded fluid can lead to premature wear and tear on expensive steering components. 
• Maintains performance: A fluid change ensures your power steering system continues to operate efficiently and smoothly.