Possible cause: The two components interacted due to the impact or installation of other equipment.

Solution: Only through plastic repair or replacement of related parts can there be no interference between parts.

2. Loose bolts or nuts

Possible reasons:

A, long-term driving on the road with bad road conditions, the bolts naturally loosen;

B, improper disassembly and installation damage bolts;

Insufficient tightening torque or incorrect bolt specifications.

Solution: Tighten or replace bolts and nuts.

3. The universal joint of the transmission shaft is invalid

Possible reasons: the dust cover is damaged or the oil leakage is not repaired in time.

Solution: Replace the universal joint of the drive shaft with a new one.

4. Abnormal sound caused by damage of each ball head, suspension and connecting bracket.

Possible causes: failure caused by loose ball head or aging and cracking of rubber gasket after long-term use.

Solution: Replace the ball head or support pad with a new one.

5. Abnormal sound of braking system

Possible reasons:

A, brake pad, brake caliper or bracket is loose;

B, brake pad or brake disc failure;

Solution: Check whether the brake system is loose and whether the brake pads and discs are abnormally worn.