If your power steering fluid is brown or black, it means the fluid is old, contaminated, or breaking down. Healthy power steering fluid should be clear, pink, red, or light amber (depending on type). Dark fluid indicates oxidation, debris, or internal wear, which can damage the steering pump and rack if not addressed.

What does it mean if power steering fluid is brown or black?

Brown or black fluid suggests the power steering system is running with degraded or contaminated fluid. This can cause reduced lubrication, overheating, and accelerated wear of internal components.

Common causes of dark power steering fluid

• Normal ageing and oxidation of fluid over time
• Contamination with dirt, metal particles, or moisture
• Rubber hose or seal breakdown releasing debris
• Lack of regular fluid flushes or maintenance
• Overheating from a failing steering pump

Why do you need to fix this problem quickly?

Contaminated fluid increases wear on the steering pump and rack, which are expensive components to replace. Fresh fluid ensures proper lubrication, smoother steering, and longer system life.

How do you know when to get it checked?

You should book an inspection if:

• The power steering fluid looks dark, dirty, or smells burnt
• You hear whining or groaning noises when turning
• The steering feels heavy or jerky
• You see leaks around the steering system
• The fluid hasn’t been changed in over 50,000 km (or as recommended)

What happens during an assessment?

A mechanic will:

1. Inspect the power steering fluid condition and level
2. Check for leaks around hoses, pump, and rack
3. Flush the old fluid and replace it with fresh fluid
4. Inspect for damage or wear in the steering pump and rack
5. Test drive to confirm smooth and quiet steering

How much does it cost to fix?

A power steering fluid flush typically costs $120–$250. If pump or rack damage has occurred, repairs can range from $600–$2,000+ depending on the vehicle.

Is it unsafe to drive with brown or black power steering fluid?

Yes. While the car may still steer, dirty fluid can quickly damage the pump and rack, leading to sudden steering failure. It should be flushed and replaced as soon as possible.