1, determine the size of the gap.
2. Check fasteners: Check all fasteners around the fender to ensure that they are tight and not loose.
3. Adjust the position of the mudguard: If the fasteners are tightened correctly, but there is still a gap, it may be necessary to adjust the position of the mudguard.
4. Replace damaged parts: If the fender is damaged or broken, it may need to be replaced.