Why does the BMW X3 jerk during acceleration?
2 Answers
Excessive carbon deposits in the engine. Causes: This situation mainly occurs when gasoline is not fully absorbed into the engine, leading to carbon deposit formation. Due to incomplete combustion in the vehicle, it results in engine shaking and increased fuel consumption. Long-term neglect of cleaning the throttle or fuel injectors, failure to replace spark plugs for an extended period, or even faults in the intake manifold or engine misfiring can affect fuel atomization and combustion, leading to a series of problems. Regarding engine oil: If the oil quality does not match the engine requirements—for example, 0W20 is suitable for Japanese cars with smooth inner walls, 5W30 is suitable for European and American vehicles, and the high viscosity of 0W40 is suitable for older cars—once the oil viscosity is too high, it can lead to increased fuel consumption and carbon deposit formation.
I'm all too familiar with the acceleration hesitation in BMW X3! A common issue is not changing the transmission oil for too long, where old oil's reduced lubrication causes gear shifting to stutter. Some people always step on the gas while holding the brake, confusing the electronic system. Last time I checked my friend's car, I found the spark plug electrodes were almost burnt out, causing intermittent ignition and jerky acceleration. BMW's turbo engines are particularly picky about fuel quality; low-quality gas from small stations with more impurities can also lead to inconsistent acceleration. A dirty mass airflow sensor is even more troublesome, as inaccurate air intake measurement directly affects throttle response. I'd say these components should be checked every 40,000 kilometers—don't wait until problems arise to deal with them.
