BMW 550i shuts off while driving and now only clicks when attempting to start on BMW 550i

Some BMW 550i owners report experiencing issues where the vehicle shuts off while driving and only clicks when attempting to start. Common causes for these problems include battery or starter failure, which can prevent the car from starting. Additionally, fuel system problems, such as low fuel or a faulty fuel pump, may lead to unexpected shutdowns and starting difficulties. Electrical malfunctions, including a bad crankshaft position sensor or ignition switch issues, can also cause the engine to turn off unexpectedly. Furthermore, faults in the ignition system and mechanical problems like timing chain or belt issues may contribute to these symptoms. Alternator issues can result in the car stopping while driving and difficulty restarting, while engine timing problems could lead to stalling. Lastly, if equipped, the Auto Start-Stop system may impact engine operation and starting behavior. Given the complexity of these issues, it is advisable for owners to consult a qualified mechanic or BMW specialist for accurate diagnosis and resolution.