High/Medium/Low represents the probability of this cause occurring
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Suggest to diagnose at workshop, the usual keypoints of diagnose are:
1. Re-align the tyre, check the tyre wear condition at the surface and the edge.
2. Check, grind or replace the brake pad.
3. Refill or replace the brake fluid.
4. Check the brake drum, grind off the carbonize layer.
5. Replace the faulty or failure part, adjust the contact point of the brake shoes.