What Causes the Abnormal Noise When Pressing the Accelerator at Low Speed in a BMW Mini?

[VonIvan]

Reasons for abnormal noise when pressing the accelerator: 1. Fuel Pump Motor: When the fuel pump motor is worn or contains impurities, it may produce abnormal noise when the accelerator is pressed. This issue requires replacing the fuel pump. 2. Throttle Body: Modern throttle bodies use electronic throttle control, where the motor controls the opening and closing of the throttle valve. If the motor gears are worn, insufficient engagement can cause abnormal noise. Excessive carbon deposits or sludge in the throttle body can also lead to noise. Cleaning the throttle body may help, but if the motor is damaged, the throttle body must be disassembled to replace the servo motor. 3. Accelerator Pedal Bearing: Poor lubrication of the accelerator pedal bearing can cause abnormal noise. Applying grease to the bearing can help lubricate it. 4. Clutch: A damaged clutch release bearing can prevent the clutch disc from fully disengaging, resulting in abnormal noise. The clutch must be removed to replace the release bearing.