Brake fluid
Brake fluid is the hydraulic fluid that transfers pressure from the brake pedal to the brake calipers, where it pushes the pads against the discs.
What it means
Brake fluid lives in a sealed system but is hygroscopic, meaning it slowly absorbs moisture from the air through seals and reservoir vents. Over time, that moisture lowers the fluid's boiling point and starts to corrode internal brake components from the inside. The visible symptoms develop slowly: a slightly softer pedal feel, an ABS warning light, fluid that has darkened from clear amber to brown. By the time the owner notices, the system is already operating outside spec. The standard recommendation is to replace brake fluid every 2 years or 40,000 km, regardless of how much is left in the reservoir. The job involves draining the old fluid through each caliper, refilling with fresh fluid of the correct DOT specification (usually DOT 4 or DOT 5.1 for European cars), and bleeding the system to remove air.
Why it matters in Singapore
Singapore's high humidity accelerates moisture absorption in brake fluid. Cars that sit in covered carparks for most of the day are no exception, since the fluid pulls water from any humid air the system breathes. For European cars, where braking systems are precisely engineered, ignoring fluid intervals is one of the easiest ways to start a chain of expensive repairs.
How Revol Carz handles this
Revol Carz Garage services brake fluid as part of every major service interval and as a standalone job on request. We use the brand-specified DOT grade for each car, refill the reservoir to the correct level, and bleed every caliper to confirm a clean, air-free system.