👉 Cartridge fluid, also known as hydraulic fluid or brake fluid, is a specialized liquid that circulates through a vehicle's braking system, typically found in disc or drum brake setups. It serves as a critical medium for transferring hydraulic pressure from the brake pedal to the brake calipers or wheel cylinders, enabling the conversion of mechanical force into hydraulic pressure that stops the vehicle's movement. Cartridge fluid is specially formulated to withstand high pressures and temperatures, ensuring reliable braking performance while minimizing wear on brake components. It also helps dissipate heat, protecting the braking system from overheating and extending its lifespan.