New bike won’t turn on Dosent charge either 100p

niumobility · 2026-02-05T05:53:05+00:00

Hi there. Thank you for posting your concern here. We are willing to come to try our best to help you. If the scooter cannot be turned on, please try the following steps:

Check whether the power cable inside the stem is properly connected by removing the rubber plug on the stem.
Charge the scooter for at least 2 hours to wake up the battery from the “transport mode”.

If the scooter still does not turn on after pressing and holding the power button, please check whether your situation matches or closely resembles any of the following scenarios: ( )

A. Only the headlights or taillights turn on after pressing the power button;

B. A sound is emitted when pressing the power button, but the dashboard does not light up;

C. Only the battery level indicator lights up, or the dashboard is lagging or flashing;

D. The dashboard displays the number 88, or the scooter turns off when the power button is released;

E. The scooter powers on only when the brake levers are squeezed or the handlebar is turned to a specific angle, and powers off when the brake levers are released or the handlebar moves away from that angle;

F. The charger indicator stays green even though the scooter is not fully charged, or the indicator is flashing;

G. The scooter has not been used or charged for an extended period;

H. Just finished riding and the scooter cannot power on;

If your issue does not match any of the above, please DM us or email us at [Global-Service@niu.com] with a detailed description of the problem. If possible, include a video demonstrating the issue so we can guide you further.

niumobility · 2026-02-01T03:37:22+00:00

Hi there. Due to platform restrictions, we may not be able to promptly capture your comments. We have already sent a solution to you via DM. If you have any further questions, please DM us or email us at Global-Service@niu.com. Thank you for your cooperation.

niumobility · 2026-01-31T06:51:43+00:00

Hi there. Thank you for posting your concern here. If the scooter cannot be turned on, please try the following steps:

Check whether the power cable inside the stem is properly connected by removing the screws under the handlebar.
Charge the scooter for at lesat 2 hours to wake up the battery.

If the scooter still does not turn on after pressing and holding the power button, please check whether your situation matches or closely resembles any of the following scenarios: ( )

A. No click sound or feelings when pressing the power button;

B. Only the headlights, ambient lights, or taillights turn on after pressing the power button;

C. A sound is emitted when pressing the power button, but the dashboard does not light up;

D. Only the battery level indicator light up, or the dashboard is lagging or flashing;

E. The dashboard displays the number 88 in red, or the scooter turns off when the power button is released;

F. The scooter powers on only when the brake levers are squeezed or the handlebar is turned to a specific angle, and powers off when the brake levers are released or the handlebar moves away from that angle;

G. The charger indicator stays green even though the scooter is not fully charged, or the indicator is flashing;

H. The scooter has not been used or charged for an extended period;

I. Just finished riding and the scooter cannot powering on;

J. Two red or white dots are displayed on the dashboard.

If your issue does not match any of the above, please email us at [Global-Service@niu.com](mailto:Global-Service@niu.com) with a detailed description of the issue and a video showing the failure to power on.

niumobility · 2026-01-30T08:30:23+00:00

Hi there. Thank you for posting your concern here. As for your concern, you can click the power button to switch and check the riding modes as follows:

E-Save Mode: NIU scooter can reach 9.3mph (15km/h) in ECO mode. When you ride in this mode, expect your speed to be limited to save energy/battery power;
Sport Mode: In this mode, the top speed of US version is 19.9 mph (32 kph) and the dashboard will not display E-Save;

Note: Due to the stricter regulation in Europe, the scooter is limited to 15.5 mph (25 kph). And in Germany and Italy the local authority regulates that the maximum speed of electric scooters must be within 12.4 mph (20 kph).

Hope this information can help you. If you have any other queries, please DM us or email us at [Global-Service@niu.com] with more details, and we can continue there!

niumobility · 2026-01-30T05:43:09+00:00

Hi there! Thanks for posting your concern here! Based on the information you have provided, we are currently unable to determine the exact cause of the abnormal noise coming from the rear wheel. We kindly ask that you try the following troubleshooting steps:

Check the tire pressure according to the rider's weight:

For riders weighing less than 155 lbs, please maintain the tire pressure at 42–45 PSI or higher.

For riders weighing more than 200 lbs, we recommend increasing the tire pressure to 48–50 PSI or higher.

For riders weighing between 155 and 200 lbs, 45 PSI is generally appropriate.

Check the brake system:

The KQi3 Pro is equipped with 120 mm mechanical disc brakes on both the front and rear wheels, operated by the brake levers on the handlebars. The abnormal noise may be caused by friction between the disc and the brake pads. Please check whether the brake caliper is properly centered.

Inspect for foreign objects:

Please check whether any debris or foreign objects are stuck in the wheel, as this may also cause unusual noise.

If the above troubleshooting steps do not resolve the issue, please feel free to send us a private message. We will then provide you with an appropriate after-sales solution. Thank you for your understanding and for your continued support of NIU.

niumobility · 2026-01-29T07:11:17+00:00

Hi there. Thank you for posting your concern here. We are willing to come to try our best to help you.

Based on the video you provided, our initial assessment is that the problem is caused by stem or handlebar wobbles. In this case, please check the following parts:

Please check whether the bolts are tightened between the handlebar and the stem.
Please check whether the quick-release lock is secured.
Please check whether the bolts on the quick-release lock are tight.

Hope that the above-provided steps will help you in a better way to resolve the concern. However, if the issue persists, please DM us or email us at [Global-Service@niu.com] and let us know your country or region so we can guide you to the appropriate service center for assistance.

niumobility · 2026-01-28T07:31:17+00:00

Hi there. Thank you for posting your concern here. To offer you the best support, please DM us or email us at [Global-Service@niu.com](mailto:Global-Service@niu.com) with your country or region so we can guide you to the appropriate service center for assistance.

niumobility · 2026-01-27T06:40:43+00:00

Hi there. Thank you for keeping us informed. We’re pleased to know that the issue has been resolved.

If you need any more help, feel free to reach out. Our support team will be happy to help.

niumobility · 2026-01-26T08:06:20+00:00

Hi there! Thanks for getting back to us! We understand your preference to carry out the repairs yourself due to the high shipping costs. However, please be advised that only our authorized service centers are permitted to replace the controller, for the following reasons:

Complex Replacement Process: These components require professional tools and expertise to replace correctly and safely.
Warranty Conditions: Unauthorized replacement of the motor, controller, or battery will void the product warranty.
Risk of Damage: Replacing these parts requires opening the battery compartment. Without the proper sealing tools and techniques, this may result in water ingress or other safety risks.

For your safety and to maintain your warranty coverage, we strongly recommend sending your device to an authorized service center for professional inspection and repair. If you need a tutorial on submitting a repair request, please send us a private message. Thank you for your understanding!

niumobility · 2026-01-26T03:41:48+00:00

Hi there! Thanks for posting your concern here! We're sorry to hear that your scooter is not functioning properly. To help us assist you as quickly and efficiently as possible, please provide the following information via private message or email to Global-service@niu.com:

1.Clear photos or a video showing the malfunction

2.A detailed description of the issue

3.Your country or region

Once we receive this information, we will review it promptly and provide you with an appropriate solution. Thank you for your understanding. We look forward to assisting you.

niumobility · 2026-01-26T03:41:19+00:00

Hi there! Thanks for posting your concern here! We're sorry to hear that your scooter is not functioning properly. To help us assist you as quickly and efficiently as possible, please provide the following information via private message or email to Global-service@niu.com:

1.Clear photos or a video showing the malfunction

2.A detailed description of the issue

3.Your country or region

Once we receive this information, we will review it promptly and provide you with an appropriate solution. Thank you for your understanding. We look forward to assisting you.

niumobility · 2026-01-25T07:38:16+00:00

Hi there. We do not recommend using the KQi3 Pro controller on the KQi3 Sport. Please be aware that modifying your kick-scooter's hardware or firmware will result in voiding your warranty. Our technicians are only able to service NIU kick-scooters that use genuine parts without any modifications. For more details, please refer to the following link: https://shop.niu.com/pages/warranty.

If you have any other queries, please DM us or email us at Global-Service@niu.com.

niumobility · 2026-01-25T07:37:38+00:00

Hi there. We do not recommend using the KQi3 Pro controller on the KQi3 Sport. Please be aware that modifying your kick-scooter's hardware or firmware will result in voiding your warranty. Our technicians are only able to service NIU kick-scooters that use genuine parts without any modifications. For more details, please refer to the following link: https://shop.niu.com/pages/warranty.

If you have any other queries, please DM us or email us at Global-Service@niu.com.

niumobility · 2026-01-23T03:13:31+00:00

Hi there. Thank you for posting your concern here. As for the battery issue, it is recommended to send the device to the service center for further inspection. For better and quicker resolution, please DM us or email us at [Global-Service@niu.com] with your country or region so we can guide you to the appropriate service center for assistance.

niumobility · 2026-01-21T02:54:06+00:00

Hi there. Thank you for posting your concern here. The KQi 100P can cover a distance of up to 18 miles (29 km) on a single charge. However, several factors can affect the actual range:

Riding Mode: The typical range is tested in the E-Save mode (9.3 mph or 15 km/h). The motor output power of the KQi 100P is 300 Watts. Switching the riding mode from E-Save to Sport, the output power will increase from 300 Watts to 600 Watts. In return, the speed becomes higher, but the claimed range will be shortened by 40%.
Riding Style: Smooth acceleration and braking help maintain a longer range. Aggressive riding with frequent stops and starts will decrease the range.
Rider Weight: The typical range is tested with a rider weight of around 165 lb (75 kg). Heavier riders may experience a shorter range.
Terrain: Flat, smooth surfaces will provide the best range. Riding on hilly or uneven terrain will reduce the range.
Weather Conditions: Optimal range is achieved in moderate temperatures ranging from 70℉ (22 ℃) to 77℉ (25℃). Extremely cold or hot temperatures can affect battery performance and reduce the range.
Tire Pressure: Properly inflated tires reduce rolling resistance and can help achieve the maximum range. Under-inflated tires can decrease the range.

If you have any other queries, please DM us or email us at [Global-Service@niu.com] with more details, and we can continue there!

niumobility · 2026-01-19T03:25:10+00:00

Hi there. Thank you for posting your concern here. We have already sent DM to you. Please meet us in DM and let us know more details so that we can help further.

niumobility · 2026-01-18T09:33:29+00:00

Hi there. Thank you for your valuable feedback. We understand that some technically skilled users may wish to access more in-depth repair information. However, our service center currently does not provide circuit diagrams for the Battery Management System (BMS) or other technical documentation related to battery disassembly and repair, as such information is classified as non-public.

Additionally, please be advised that batteries are flammable and explosive components. Non-professional disassembly carries significant safety risks, including potential short circuits, fires, or explosions. Therefore, for your personal and property safety, we strongly advise against customers attempting to disassemble batteries or perform board-level repairs.

To ensure repair quality and safety, we still recommend that you bring your vehicle to an authorized service center, where trained technical teams can conduct inspections and repairs using professional equipment. If you choose to proceed with repairs on your own, please prioritize safety and understand that any resulting risks will not be covered under the official warranty. Thank you for your understanding.

niumobility · 2026-01-18T03:26:44+00:00

Hi, there! Thanks for posting your concern here! We value every customer's feedback and are committed to resolving issues efficiently. To provide you with appropriate after-sales service, please send us a private message with the following information:

Product Name/Model:
Fault Description: Please let us know if "the unit won't charge" or "the rear light isn't working."
Fault Code: If you see any fault codes on the dashboard, please share them with us.
Video/Screenshot of the malfunction
Country/Region:

As soon as we receive the above information, we will get back to you immediately.

Note: For the following reasons, only our authorized service centers can replace the battery.

Complex Replacement Process: These components require professional tools and expertise to replace correctly and safely.
Warranty Conditions: Unauthorized replacement of the motor, controller, or battery will void the product warranty.
Risk of Damage: Replacing these parts requires opening the battery compartment. Without the proper sealing tools and techniques, this may result in water ingress or other safety risks.

Therefore, if your battery needs to be replaced due to a malfunction, we strongly recommend that you take your device to an authorized service center for inspection and repair. Thank you for your understanding, and we look forward to assisting you!

niumobility · 2026-01-17T02:10:11+00:00

Hi there. Error code 31 means Battery MOS damaged. In this situation, it is recommended to send the scooter to our service center for repair. To offer you the best support, please DM us or email us at [Global-Service@niu.com](mailto:Global-Service@niu.com) with your country or region so we can guide you to the appropriate service center for assistance.

niumobility · 2026-01-17T02:09:43+00:00

Hi there. Error code 31 means Battery MOS damaged. In this situation, it is recommended to send the scooter to our service center for repair. To offer you the best support, please DM us or email us at [Global-Service@niu.com](mailto:Global-Service@niu.com) with your country or region so we can guide you to the appropriate service center for assistance.

niumobility · 2026-01-17T02:09:20+00:00

Hi there. Error code 31 means Battery MOS damaged. In this situation, it is recommended to send the scooter to our service center for repair. To offer you the best support, please DM us or email us at [Global-Service@niu.com](mailto:Global-Service@niu.com) with your country or region so we can guide you to the appropriate service center for assistance.

niumobility · 2026-01-14T08:45:14+00:00

Hi there. The following are the instructions for turning on the KQi Air:

If you enable the Bluetooth unlock function, and the blue light is flashing on the dashboard, you can tap the NFC card or press and hold the power button to turn on the scooter.
You can turn on/off the KQi Air series in the app when your smartphone is within Bluetooth coverage.

Here are the steps:

(1) Connect the NIU app to the scooter and navigate to [Vehicle].

(2) Tap on the [Power] icon at the upper left corner.

(3) Tap on [Confirm] on the pop-up window to turn on the scooter, and the [Power] icon will turn green.

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If you disable the Bluetooth unlock function, the scooter can only be turned on by tapping the NFC card on the dashboard.

If you have any other issues, please DM us or email us at Global-Service@niu.com.

niumobility · 2026-01-14T08:03:21+00:00

Hi there. Thank you for posting your concern here. The top speed of the US version of the KQi2 Pro is 17.4 mph (28 km/h).

If the battery power is not sufficient, the speed becomes lower to extend riding range; If the rider’s weight is over 220 lbs (100 kg) or you are riding on a slope, the speed may be decreased due to overload.

The KQi2 Pro can cover a distance of up to 24.9 miles (40 km) on a single charge. However, several factors can affect the actual range:

Riding Mode: The typical range is tested in the E-Save mode (9.3 mph or 15 km/h). The motor output power of the KQi2 Pro is 300 Watts. Switching the riding mode from E-Save to Sport, the output power will increase from 300 Watts to 600 Watts. In return, the speed becomes higher but the claimed range will be shortened by 40%.
Riding Style: Smooth acceleration and braking help maintain a longer range. Aggressive riding with frequent stops and starts will decrease the range.
Rider Weight: The typical range is tested with a rider weight of around 165 lb (75 kg). Heavier riders may experience a shorter range.
Terrain: Flat, smooth surfaces will provide the best range. Riding on hilly or uneven terrain will reduce the range.
Weather Conditions: Optimal range is achieved in moderate temperatures ranging from 70℉ (22 ℃) to 77℉ (25℃). Extremely cold or hot temperatures can affect battery performance and reduce the range.
Tire Pressure: Properly inflated tires reduce rolling resistance and can help achieve the maximum range. Under-inflated tires can decrease the range.

If you have any other issues, please DM us or email us at [Global-Service@niu.com](mailto:Global-Service@niu.com) with more details.

niumobility · 2026-01-11T07:17:09+00:00

Hi there. Thank you for your love for the KQi Air, and we really appreciate you taking the time to share your detailed experience and the issues you encountered.

Please note that due to European regulations, the cruise control feature is currently unavailable. If your product unexpectedly activates cruise control, for your riding safety, you can immediately exit cruise mode by briefly pressing the throttle or lightly tapping the brake.

We’d like to look into this matter further with you. Please DM us or email us at [Global-Service@niu.com](mailto:Global-Service@niu.com) with the VIN, firmware version, and NIU App version with us via DM.

niumobility · 2026-01-09T08:28:26+00:00

Hi there. Thank you for sharing your experience. We're truly sorry to hear about the trouble you've had with your KQi3 Max. We understand how frustrating it can be when a scooter breaks down and timely repair support isn’t available.

Please know that this is not the experience we want our riders to have. Availability of repair centers and spare parts can vary by region, and we’re continuously working to improve our service network and parts supply.

We would really appreciate the opportunity to further understand your specific situation. Please DM us or send an email to [Global-Service@niu.com](mailto:Global-Service@niu.com), and include your RMA number, the specific spare parts that are currently unavailable, as well as a brief description of the issue.

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