3 ms·

Modern vehicles are required to turn on the brake lights at a given level of deceleration, regen / brakes or not!

• oh_sigh 6y ago
  So if I'm driving a new manual transmission car, and downshift/engine brake, my brake lights would activate?
  • zamfi 6y ago
    That’s my understanding! EDIT: Actually this may only be required for vehicles with certain features, like regen or endurance braking! Car regulations are...complex.