1. Note any signs of abnormal operation of steering, suspension, violation of drivability, check the car "holds the road." | 2. When driving, pay attention to all the popping noise and vibration, which were absent before. | 3. Check the smoothness of the steering control, said, "discontinuity" or are tight, which is felt when turning the steering wheel. Celebrate all the noises that are heard while riding on a bumpy road. |
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