If you are experiencing abnormal noise from the rear wheel of your V40, don't worry, we are here to help! Follow these steps to identify and resolve the issue:

1. First, check the tire pressure and look for any foreign objects inside the tire. If the pressure is low or there are any objects inside, this could be the cause of the noise.

2. Next, check the screws that hold the wheel in place. If they are loose or missing locks, they need to be re-tightened.

3. Check the left and right axle sleeves, anti-drop gaskets, and rear mudguard brackets for any missing components or improper assembly. If any are found, reassemble them.

4. Look for any foreign objects at the location of the abnormal noise and clean them out.

5. Check the rear wheel, frame, rear mudguard, rear mudguard bracket, and other materials for any deformations. If any are found, correct or replace the materials.

6. Check if the tail light cable has fallen off and re-wire it if necessary.

7. Finally, check if the lubrication at the abnormal sound position is sufficient. If not, increase the lubrication.

By following these steps, you should be able to identify and resolve the issue causing the abnormal noise from your V40's rear wheel. If you are still experiencing issues, please don't hesitate to contact our customer support team for further assistance.