Brakes — critical system failure
The red brake icon (circle with an exclamation mark or the word BRAKE) signals a critical deviation in the brake circuit. Unlike the amber ABS light, this one demands immediate action — continuing to drive is unsafe.
What this indicator means
The indicator combines several signals: brake-fluid level sensor in the reservoir, circuit pressure sensor, handbrake engaged, or vacuum-booster failure. On modern cars the system can also warn about critical pad wear. The red colour distinguishes danger from the informational amber ABS light.
Common causes
- Handbrake not fully released (simplest cause — 40% of cases)
- Critically low brake-fluid level (leak)
- Brake pads worn below the critical threshold
- Cracked hose or brake line (fluid leak)
- Master cylinder seized
- Vacuum booster failure (rock-hard pedal with engine off)
What to do as a driver
First check the handbrake — is it fully released? If not, lower it and the light should clear. If it stays on: open the bonnet, check reservoir level. Below MIN means a leak somewhere; do not continue driving. Search for drips at all four wheels and along the lines.
Safety
Critical: brakes may fail completely. Call a tow if fluid is leaking or the pedal is rock-hard. Do not test brakes on the motorway.
Related DTC codes
- C0035
- C1288