If the brake still stops normally, start with these checks. Noise alone does not tell you whether the cause is dirt, wear or adjustment.
1. Park and inspect: Switch the scooter off, support it securely and let the brake cool. Look for visible dirt, a damaged disc, loose parts and worn pads. Keep fingers away from a moving wheel or disc.
2. Clean the disc: Wipe the accessible braking surfaces with a clean, lint-free cloth and isopropyl alcohol or a bicycle disc-brake cleaner approved for the fitted brake. Follow the cleaner and brake instructions and let it dry. Keep oil and grease off pads and discs. Do not blow brake dust with compressed air or use a pressure washer. Cleaning the disc alone does not repair oil-contaminated pads.
3. Choose the matching repair: For cable slack on a mechanical brake, use the illustrated cable-adjustment guide. For worn pads, use the pad-check and replacement guide, including the ES210 video where the fitted brake matches. Use the wear limit for the exact pad and disc; no single thickness or mileage applies to every model.
Before riding: Squeeze and release the lever several times. The brake must engage firmly before the lever reaches the grip, the fastenings must be secure and the wheel must turn freely when released. Test at walking speed in a clear area before normal riding.
When to get help: Do not ride with weak braking, strong grinding, a damaged or loose brake, leaking fluid or unexpected wheel locking. If checks fail or the cause remains unclear, send the model, a photo and what you have tried in the chat. Augment 360 hydraulic brake repair and bleeding require an appropriate specialist workshop.