Owners of Xiaomi scooters (especially the popular M365, Pro 2, 1S or 4 Pro models) often experience sudden squeaks while driving, braking, or even at rest. This sound is not just an annoying signal, but a fault code that the device uses to communicate with the user. You can not ignore it: at best you risk being left without transport, at worst – provoke an accident.
In this article, we will discuss all possible causes of squeak, from banal (discharged battery) to critical (controller or motor problems), you will learn how to decipher sound signals by their tone and frequency, which manipulations will help to eliminate the problem yourself, and in which cases you should immediately contact the service. Particular attention will be paid to models 2023-2026 with the updated ESC firmware (Electronic Speed Controller), where the logic of sound alerts has changed.
We warn you that some “solutions” from the Internet (such as turning off the speaker or resetting settings) can aggravate the breakdown. We have collected only proven methods, confirmed by experienced wizards and official Xiaomi service centers.
1.Skick when braking: problems with the braking system
If the scooter makes a sharp squeak when you press the brake lever, 90% of the time it is the wear of the brake pads or the electronic brake (E-ABS) that is to blame. Xiaomi models with disc brake systems (for example, Pro 2 or 4 Pro) squeak often appears when the residual thickness of the pads is less than 2 mm.
Another common cause is brake disc contamination, because dust, sand, or oil stains reduce the braking efficiency, and the controller signals it with a sound. It's easy to check this: lift the scooter and spin the wheel manually. If you hear grinding or friction, the problem is the mechanical part.
- 🔧 Worn-out pads – require replacement (average resource: 1000-1500 km).
- 🛑 Contaminated brake disc - Clean with alcohol or a special cleaner.
- ⚡ Faulty sensor E-ABS – check wiring and contacts.
- 🔄 Too tight tension of the cable - adjust with a bolt on the brake lever.
⚠️ Warning: If the squeak is still there after replacing the pad, don't ignore it! In Xiaomi's dual-brake models (disk + E-ABS), a malfunction of one component can block the other, resulting in a complete loss of brakes.
Speech when accelerating or driving: controller signals
If the scooter is beeping while driving (especially when speeding), the problem lies in the electronic control unit (ESC).
- 🔋 Low battery charge (less than 10-15%) – the controller warns of an imminent shutdown.
- 🔥 Overheating of the motor or battery is a common problem when driving in the heat or with overload.
- ⚠️ Hall sensor error - failures in determining the position of the motor rotor.
- 🛠️ Incompatible firmware – false positives may appear after the software update.
To diagnose the problem, follow the following steps:
- Check the charge level in the Mi Home app or on the scooter display.
- Stop and let the device cool for 10-15 minutes. If the squeak stops, the problem is overheating.
- Try resetting the controller settings via a button combination (for the M365: hold the Power + Mode for 5 seconds).
Check the battery charge
Estimate the temperature of the body (norm: up to 40 ° C)
Update the firmware through Mi Home
Reset the controller settings-->
If the squeak is accompanied by jerks or loss of power, this may indicate a malfunction of the engine, in which case professional diagnosis is required.
3.Skick on Enablement: Initialization Errors
A brief squeak when you turn on (1-2 signals) is normal: this is how the scooter reports readiness for operation, but if the sound is repeated repeatedly or has a long tonality, it is a sign of failure:
| Type of squeak | Possible cause | Decision |
|---|---|---|
| 3 short signals | Error of communication between the controller and the battery | Check the battery contacts, clean oxidation |
| 1 long + 2 short + 2 long + | Failure of the speed sensor | Replace the sensor or check the wiring |
| Continuous squeak | Critical Controller Error (possibly after a fall) | Reflashing or replacing the ESC is required |
| Blinking squeaker | Low voltage in the battery (less than 36V) | Charge the battery with the original ZU |
Especially often, these errors occur after falls or bumps, when the integrity of the connections is violated. If the Xiaomi scooter does not turn on at all, but squeaks, try:
- 🔌 Disconnect and reconnect the battery.
- 🔄 Reset settings via the Reset button (located under the cover next to the charging port).
- 📱 Update the firmware through the app (if the scooter reacts to the onset in any way).
What to do if the scooter does not respond to the discharge?
4.Skick when charging: battery problems
If the scooter is beeping while charging, it's almost always due to a battery or charger malfunction.
- ⚡ Non-original RAM – can give the wrong voltage (norm for Xiaomi: 42V, 1.5-2A).
- 🔋 Bloated or damaged battery cells – require urgent replacement!
- 🔌 Oxidized contacts - clean with alcohol and lubricate with a special paste.
- 📉 Deep discharge – if the scooter has been unloaded for a long time, the controller can block charging.
How do you check? Connect the original charger and watch the indicator:
- Green light + squeak – charging is normal (squeaking can mean the end of the process).
- Red light + continuous squeak - battery error (possibly requires replacement of the BMS- pay).
- Blinking orange + squeak - unstable voltage (check the socket and cable).
⚠️ Warning: If the battery is swelling or deformed, don't try to charge the scooter! The risk of fire is extremely high. Remove the battery immediately (in gloves!) and dispose of it at a special reception point.
5.Skick after falling or hitting: mechanical damage
Hitting and falling are common causes of hidden squeaking damage, and even if the scooter looks whole, check:
- 🛴 Deformation of the steering column - may clamping the wires going to the controller.
- 🔗 Sockets and plumes — they often recede or oxidize after impact.
- 🔊 Speaker - if the squeak is distorted or intermittent, the membrane may be damaged.
- 🛠️ Motor attachment – backlash can cause vibrations that the controller perceives as an error.
For diagnosis:
- Visually inspect the body for cracks, especially in the places where the battery and motor are attached.
- Swing the steering wheel left-right - if there is a backlash, you need to tighten the bolts.
- Check if the wires between the frame and the wheel are clamped (a common problem after falls).
💡
If the scooter began to beep and “twitch” when overclocking, the Hall sensor settings most likely lost, and you can restore them through calibration in service mode (for Xiaomi M365: hold Power + Torch when turned on).
6.Speak after firmware update: software glitches
Firmware updates through Mi Home sometimes lead to false alarms.
- 🐞 Bugami in the new version of the software (especially relevant for beta firmware).
- 🔄 Incomplete Update – If the process is interrupted, the controller may not work properly.
- 📵 Iron incompatibility – older models (e.g., 2018’s M365) may conflict with new algorithms.
How do you fix it?
- Roll back the firmware to the previous version (via Settings → Update → Roll back to Mi Home).
- Reset the settings to factory settings (Power + Mode for 10 seconds).
- Reflash the controller manually through ST-Link (sweater skills are required).
💡
If the squeak appeared immediately after the update, do not rush to disassemble the scooter! In 80% of cases, the problem is solved by rolling back the firmware or resetting the settings.
7.Skick when driving on irregularities: sensors and depreciation
Some Xiaomi models (such as the 1S or Essential) squeak when driving on pits, curbs or gravel.
- 📡 Vibration sensor sensitivity – the controller perceives the shaking as an accident.
- 🛞 Luftom in wheel bearings -- creates parasitic signals for the speed sensor.
- 🔧 Weakened mounts - vibration is transmitted to the controller board.
Decisions:
- Pull up all bolts (especially on the steering column and motor mount).
- Lubricate the wheel bearings (use only specialized lubrication for electric scooters).
- Turn off the drop sensor in the settings (if it is in your model).
If the squeak appears only at high speed (more than 25 km / h), this may be a warning about exceeding the limit set in the settings.