What to Do When the Brake Disc Warning Light Comes On?

[AutumnFitz]

The brake disc warning light coming on suggests that the fault cause should be checked promptly. It may be due to severely worn brake pads or insufficient brake fluid level. Here is some related information about brake discs: 1. Material: Brake discs are made of China's gray cast iron 250 standard, abbreviated as HT250, equivalent to the American G3000 standard. The requirements for the three main chemical elements are: C: 3.13.4, Si: 1.92.3, Mn: 0.6~0.9. 2. Function: Brake discs are used for braking, with the braking force coming from the brake caliper. When the brake is applied, the caliper clamps the brake disc to slow down or stop the vehicle. Brake discs offer effective braking performance and are easier to maintain compared to drum brakes.

[MatteoFitz]

Recently, my friend's car also had the brake disc warning light come on, which is usually due to excessively worn brake pads or insufficient brake fluid. Don’t rush to drive; park the car in a safe place and check it first. If you know how, take a look at the thickness of the brake pads—if they're too thin, they need to be replaced. If the brake fluid is low, just top it up with the same type of fluid. However, if the ABS light also comes on the dashboard at the same time, it might be a sensor failure. This situation is not something to take lightly—brake system issues are extremely dangerous, so it’s best to contact a repair shop immediately. Also, pay attention to cleaning the wheel hubs when washing the car, as excessive brake dust can trigger false warning lights.

[MacMia]

As a veteran driver with over 20 years of experience, I've seen many instances of the brake warning light coming on. The most common cause is worn brake pads - when the metal wear indicator contacts the brake disc, it triggers the warning light. I recommend immediately measuring the brake pad thickness; replacement is necessary if it's below 3mm. Another reason could be low brake fluid level below the MIN mark, especially in older cars prone to leaks. Last year, I encountered a fault caused by oil seepage at a brake hose connection. Many modern cars with electronic parking brakes may also show false warnings - in such cases, try restarting the vehicle. Regardless of the cause, when this red light comes on, you should avoid long-distance driving and find the nearest auto repair shop for inspection - safety first.

[EliFitz]

Never ignore the brake warning light—it's even more critical than the engine malfunction light. First, pull over safely and turn on your hazard lights to alert other drivers. Check if the handbrake is fully released, as sometimes it gets stuck halfway and triggers the light. Next, pop the hood and inspect the brake fluid reservoir; top it up if the level is below the marked line. If the fluid level is normal, it likely means your brake pads are worn out. Remember: never substitute water for brake fluid—it corrodes the brake lines. Last time I replaced a full set of brake pads at the dealership, it cost me over 800 yuan—a necessary expense since safety comes first.