low brake fluid light · brake fluid reservoir light
A dedicated sensor in the brake fluid reservoir has detected the fluid level dropping below the minimum mark, separate from the general brake system light on some vehicles.
Check pad thickness first, since worn pads are the most common and least serious cause. If pads are fine but fluid keeps dropping, inspect for leaks at the calipers, lines, and master cylinder.
Only cautiously to a service point if the brake pedal feels firm and normal. If the pedal feels soft or sinks, stop and do not drive - have the car towed.
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Descriptions are for guidance only and do not replace a workshop inspection. If you are ever unsure whether it is safe to keep driving, pull over in a safe spot.
This warning light sometimes appears alongside these symptoms:
Brake System Warning Light
CriticalThis red light points to a problem with the braking system itself - most often low brake fluid, but it can also mean a hydraulic fault or uneven brake pressure between circuits.
Parking Brake Warning Light
WarningThis light most commonly just means the parking brake is engaged, but if it stays on after you release it, it can share the same circuit as the brake fluid warning.
ABS Warning Light
WarningThe anti-lock braking system has detected a fault and disabled itself. Normal brakes still work, but you lose anti-lock protection during hard braking.
Brake Pad Wear Warning Light
WarningA wear sensor embedded in the brake pads has made contact with the rotor, signaling that the pads are close to or past their minimum thickness.
