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uk Transport & mobility emergencies

What to do if…
your brakes fail while you are driving

Produced and maintained by PanicStation.org Published: Last reviewed: Editorial policy UK guide

Short answer

Lift off the accelerator, keep steering smoothly, press the footbrake firmly and use progressively lower gears to reduce speed. Aim for the safest available place away from moving traffic, then arrange emergency or recovery help.

Do not do these things

  • Do not switch off the engine while the vehicle is moving.
  • Do not select neutral, park or reverse, or keep the clutch pressed down while trying to slow.
  • Do not pull a conventional parking brake sharply or make sudden steering movements.
  • Do not use hazard warning lights while moving unless you are on a motorway or unrestricted dual carriageway and need to warn drivers behind of a hazard.
  • Do not handle a phone while you still need to control the vehicle.
  • Do not continue the journey after stopping.
  • Do not step into live traffic or place a warning triangle on a motorway.

What to do now

  1. Lift your foot fully off the accelerator and cancel cruise control using its normal control if it is active. Keep the engine running, look where you want the vehicle to go and steer as smoothly as possible.

  2. Press the footbrake firmly and steadily. If the pedal pulses and the vehicle is slowing, keep firm pressure because this may be the anti-lock braking system operating. If the brake has no effect, continue immediately with the other ways of reducing speed.

  3. Keep the vehicle in gear and change down progressively. In a manual vehicle, release the clutch after each suitable change. In an automatic vehicle, select a lower gear or manual mode if available. Do not select neutral.

  4. Signal and move towards the left when it is safe. On a motorway or unrestricted dual carriageway, you may use the hazard warning lights briefly while moving to warn drivers behind. Use the horn if necessary to warn another road user of your presence.

  5. Look for the safest available stopping place, such as a service area, exit, lay-by, emergency area, hard shoulder or open area away from moving traffic. Keep avoiding sudden changes of direction.

  6. If the footbrake remains ineffective, apply a conventional parking brake progressively rather than sharply. If the vehicle has an electronic parking brake, use its emergency braking function only if you already know how your vehicle’s system is meant to operate; electronic parking-brake emergency operation varies by model.

  7. Once stopped, switch on the hazard warning lights, secure the vehicle in park or an appropriate gear and switch off the engine.

  8. On a motorway or other high-speed road, leave through the side furthest from traffic and wait behind a safety barrier if this can be done safely. Keep well away from the vehicle and moving traffic.

  9. If you stop in a live lane or cannot leave the vehicle safely, stay inside with seat belts and hazard warning lights on. Call 999 and ask for the police, or press the vehicle’s SOS button if it has one.

  10. Contact a breakdown recovery service and tell them that the brakes failed. Arrange recovery rather than trying to drive the vehicle again.

What can wait

You do not need to diagnose the fault, inspect the brakes, arrange repairs, contact your insurer, investigate responsibility or report a possible manufacturing defect while securing the immediate situation. Those matters can wait until everyone is away from moving traffic and recovery has been arranged.

Important reassurance

Focus only on keeping control, reducing speed and reaching the safest available stopping place. You do not need to solve the mechanical problem while the vehicle is moving.

Scope note

This guide covers immediate first steps only. Inspection, repairs, insurance matters and any later reporting may require help from a recovery provider, qualified mechanic, insurer, manufacturer or relevant authority.

Important note

This is general road-safety information, not legal, mechanical or professional driving advice. Vehicle controls and emergency braking systems vary, so follow instructions from the emergency services and the vehicle manufacturer where available.

Additional Resources

Closely connected guides that may be useful during the same situation or its immediate aftermath.

About this guide

This guide was produced and is maintained by PanicStation.org using its published editorial process. Official and specialist sources are checked where relevant, and AI-assisted tools may be used for drafting, organisation, and consistency checks. The site operator remains responsible for publication, revision, and removal decisions.

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