Zhìdòng tàbǎn chūxiàn gùzhàng shí yào lìjí tíngchē.
If the brake pedal malfunctions, stop the vehicle immediately.
Tips
usage
The technical/written term used in driving manuals and auto-repair contexts. In everyday speech drivers usually just say 刹车 ('the brake') or 刹车踏板. 制动 is the formal verb 'to brake / apply brakes,' literally 'control + movement.'
