Power Steering Fluid: When and How to Change It

Many cars built after roughly 2012 use electric power steering, which has no fluid at all. If there is no reservoir with a steering-wheel symbol on the cap, there is nothing to service. Some vehicles use an electro-hydraulic hybrid system that does have fluid.

A practical interval is every 50,000–75,000 miles, or sooner if the fluid is dark brown or black rather than clear red or amber, smells burnt, or contains visible particles.

Whining when turning at low speed, stiff steering when cold, and a shudder at full lock are all signs of degraded or low fluid — check the level before assuming pump failure.

This exchanges most of the fluid without opening a line or introducing air into the system, which is why it is safer than a full drain for a home job.

• 1. Engine off and cool. Remove the reservoir cap.
• 2. Draw out as much old fluid as you can with a clean syringe or fluid extractor.
• 3. Refill to the MAX line with the correct fluid.
• 4. Start the engine and turn the wheel slowly lock to lock five or six times.
• 5. Shut off, extract and refill again. Repeat two or three times over a few days until the fluid stays clean.

Some systems take ATF; others require a specific power steering fluid — and several European systems require a green mineral-based CHF fluid that is not interchangeable with anything else. The wrong fluid swells or shrinks the seals in the rack, and a leaking rack is a major repair. Check the cap and the manual.