Brake Fluid: lifespan, maintenance and replacement

Typical lifespan: 2–3 years.

Maintenance schedule

• Check reservoir level and investigate any drop or leak — Per owner's manual
• Have fluid replaced with the specified type and correct bleeding procedure — Per vehicle service schedule

Signs it needs replacing

• Service interval reached or professional testing indicates fluid deterioration
• Contamination requiring professional hydraulic-system assessment
• Soft or sinking pedal — stop driving safely and seek diagnosis
• Fluid loss or leakage — urgent inspection, not just a top-up

Tips

Common glycol-based brake fluids absorb moisture. Follow your vehicle's interval and fluid specification; color alone is not a reliable service test and fluid replacement alone does not fix a soft pedal.