What Causes Sudden Jerking During Acceleration in BMW 5 Series?
2 Answers
BMW 5 Series experiencing sudden jerking during acceleration can be attributed to the following reasons: fuel line blockage, abnormal ignition, and stubborn internal dirt or impurities. Below are the causes and solutions for sudden jerking during acceleration in BMW 5 Series: Fuel line blockage: Clean the fuel line, fuel injectors, fuel system, and fuel pipes. It is normal for an automatic transmission car to have some jerkiness when starting. If you want to accelerate quickly while driving, you need to press the accelerator pedal deeply. At this point, the automatic transmission will downshift to increase the engine speed. When the speed reaches a certain level, it will upshift again. After upshifting, the speed will drop significantly, resulting in a relatively noticeable jerkiness. Ignition system issues: Automatic start-stop combined with a dual-clutch transmission inherently has this problem. If the ignition is abnormal, replace the spark plugs or ignition coils.
I also experienced sudden jerking acceleration when driving my BMW 5 Series. It felt like the car lurched forward and then hesitated, which was quite unsettling. I believe the most common cause is ignition system issues, such as worn spark plugs or aging ignition coils leading to unstable ignition and inconsistent engine power output. Additionally, fuel system problems like clogged injectors or insufficient fuel supply from the fuel pump can also cause jerking, especially during rapid acceleration. Sensor failures, such as a dirty mass airflow sensor or faulty throttle position sensor sending incorrect signals, can make the computer misinterpret and increase throttle input. I recommend not ignoring it, as jerking may escalate into more serious engine problems. Regular maintenance checks on these components are crucial, especially for BMW's high-precision electronic systems. Periodic scanning with a diagnostic tool for trouble codes can prevent issues. Safety first—if it happens, immediately reduce speed and stop the vehicle safely.
