GAFLE

Many drivers see the warning light and simply add some brake fluid to turn off the alert, without investigating the real reason behind low fluid level. Low brake fluid is just a symptom, not the root problem. It can be caused by normal brake pad wear or dangerous brake fluid leakage. Distributors and mechanics need to teach end users how to tell these two scenarios apart.

Brake caliper pistons push against brake pads. As brake pads wear thinner over time, pistons move further out. This movement increases the internal volume of the caliper, which pulls fluid from the master cylinder reservoir. As a result, the fluid level inside reservoir slowly goes down. This type of slow level drop happens over thousands of kilometers. No fluid stain will be found under the vehicle, and brake pedal feel remains firm. In this case, replacing brake pads and topping up brake fluid solves the issue.

If the brake fluid level drops quickly within a short driving period, you must check for hydraulic leaks immediately. Leaks can occur at rubber brake hoses, caliper seals, wheel cylinders, master cylinder or pipe connections. Brake fluid leaks leave clear wet stains on brake parts or puddles under the chassis. Leakage reduces hydraulic pressure, leading to a soft brake pedal and partial or total braking failure risk. Vehicles with confirmed brake leaks cannot be driven before full repair.

Damaged reservoir float sensors can also trigger warning lights even when brake fluid volume is normal. Overfilling brake fluid reservoir is another common mistake. When brake temperature rises, fluid expands. Too much fluid inside the reservoir creates excess pressure and may damage system seals. Technicians should maintain brake fluid level between the MIN and MAX marked lines on the reservoir.

Always remind customers: topping up brake fluid only hides the warning light temporarily. Technicians must inspect the full brake system to confirm whether fluid loss comes from pad wear or leakage. Gafle brake fluid series delivers stable hydraulic performance for passenger cars, commercial vehicles and racing applications. Contact our team if you need bulk brake fluid and technical materials for your auto business.