What Causes the Strong Jerking Sensation When Braking in a BMW?
1 Answers
BMW experiencing a jerking sensation during braking can be analyzed from aspects such as low-speed jerking, upshift jerking, and downshift jerking. Below is a detailed analysis: 1. Low-speed jerking: Issues with the transmission gear programming, internal contamination and impurities in the transmission preventing effective adjustment, and poor transmission cooling, which affects oil pressure and causes jerking. 2. Upshift jerking: The transmission's response speed is not fast enough, and the upshift speed cannot keep up with the accelerator pedal's speed. 3. Downshift jerking: Due to the intervention of the energy recovery system, when the driver releases the accelerator pedal or presses the brake pedal, it affects the engine speed, causing the engine speed and the clutch speed to be out of sync, resulting in a jerking sensation.