What are the reasons for a BMW suddenly stalling while driving?
2 Answers
BMW suddenly stalling while driving may be caused by the following reasons: 1. Use of inferior fuel: Generally, stalling does not occur randomly. The main reason for stalling may be the use of inferior (substandard) fuel, leading to engine carbon buildup and stalling. 2. Engine computer malfunction: With prolonged use, the likelihood of the engine computer malfunctioning increases, and a malfunctioning engine computer can cause the car to stall. 3. Engine failure: Damage to the engine idle speed or idle speed motor circuit, or issues with the idle speed control module in the engine electronic control unit (ECU). 4. Fuel pump failure: A stuck fuel pump or a malfunctioning fuel pump can cause sudden fuel supply interruption, which can easily lead to car stalling.
I've been driving for over 20 years and have experienced several embarrassing incidents of stalling while driving. Once, I was driving an old BMW 5 Series on the highway when it suddenly lost power, and the steering wheel became heavy, which really scared me. Later, it was found that the fuel pump had aged, and unstable oil pressure could cause the engine to starve. Common reasons also include excessive carbon buildup on spark plugs leading to ignition failure, or a dirty mass airflow sensor misjudging the intake volume. Loose battery terminals can also cause power interruptions, so it's important to check the terminals. Occasionally, the engine control unit might act up as well. If it really happens, don't panic—immediately turn on the hazard lights, pull over, and call for assistance, which is the safest option. Regular maintenance is crucial. I change the oil every six months and have the fuel system checked at the same time, which has significantly reduced problems.
