What does it mean when the BMW 3 Series turn signal flashes 3 times?

[MacRobert]

If the BMW 3 Series turn signal flashes 3 times, it may be because the turn signal was not fully engaged, defaulting to an automatic reset after three flashes. Definition of Turn Signal: The turn signal is an important indicator light that is activated when a motor vehicle turns to alert surrounding vehicles and pedestrians. The turn signal bulb uses a xenon tube, controlled by a microcontroller circuit, with alternating left and right flashes for continuous operation. The turn signal employs a flasher unit to achieve the blinking effect. It can mainly be categorized into three types: resistance wire type, capacitor type, and electronic type. Structure and Principle of Turn Signal: The resistance wire type can be further divided into thermal wire type (electrothermal) and wing type (spring-loaded), while the electronic type can be subdivided into hybrid type (with contact-type relays and electronic components) and fully electronic type (without relays). For example, the spring-loaded flasher operates on the principle of thermal expansion and contraction, using the heat effect of current to cause sudden movement of the spring blade, thereby connecting and disconnecting the contacts to achieve the flashing effect.