What causes the jerking sensation when starting a BMW X3?
1 Answers
The reasons for the jerking sensation when starting a BMW X3 are as follows: 1. Damaged engine or transmission mounts (engine mounts): This is the most likely cause of jerking during vehicle start-up or braking. In any car, the engine and transmission form an integrated unit, secured by at least three or more mounts. If the rubber portion of one or more mounts becomes aged, cracked, or detached, it can lead to instability in the engine's fixation. 2. Clutch damage: If the pressure plate is damaged and fails to provide sufficient clamping force, or if the clutch disc wears unevenly with an uneven surface, the engine may experience idling or slipping during clutch engagement. This results in unstable power output, causing the car to jerk. 3. Ignition system malfunction: A fault in the ignition system can reduce the ignition frequency during vehicle start-up, leading to a decrease in engine power. Additionally, the engine cannot provide strong torque, resulting in jerking or shaking during the initial acceleration phase.