What is the 7 step brake check?

The 7-step brake inspection is a key process to ensure the safety and reliability of a vehicle's braking system. If it is insufficient, add brake fluid of the same brand and model; mixing other fluids is prohibited. Second, feel the "pedal feel" by pressing the brake pedal. The normal free travel should be between 6 and 20 millimeters. If the pedal is soft or exhibits elasticity, check for air leakage or hydraulic failure in the system. Third, inspect the brake lines and connection points for fluid leakage or looseness. Fourth, test the pedal response after the engine has been running for a few minutes to confirm that the hydraulic system pressure is normal. Fifth, conduct a dynamic test: when the vehicle is traveling at 20 to 30 km/h, emergency braking should not cause deviation and deceleration should be linear, with the vehicle able to start normally after releasing the pedal. Sixth, assess the wear condition by checking whether the brake disc surface is cracked, rusted, or uneven, and whether the brake pad thickness meets the standard (typically requiring a remaining thickness of more than 3 millimeters). Additional notes should specify that steering wheel deviation or vibration during braking may indicate uneven caliper force or brake disc warping. Brake noise (such as metal grinding sounds) typically signals excessive brake pad wear, requiring prompt replacement to prevent damage to the brake disc. All inspections must use manufacturer-specified brake fluid, with regular moisture content testing (replacement required if exceeding 3%) to ensure braking performance complies with safety standards.