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January 2025 – Online purchase (delivered to Portugal)
From the very beginning, the real-world range was only 12–15 km in ECO mode — far below the advertised 35–40 km.

First warranty claim:
The official NIU service partner checked only battery capacity and returned the scooter without conducting a full range test. The issue remained unresolved.

One week later:
The scooter broke down completely — it wouldn’t move at all.

Second warranty claim:
The service center claimed that I had installed U.S. firmware and that the scooter reached 34 km/h.
They offered no proof and demanded ~70% of the scooter's price to replace the motor and controller.

I repeatedly requested:
proof of modification and a full technical diagnostic report
→ None of this was provided.
I never modified anything — I only used the official NIU app.

June 2025 – Escalation and manufacturer reversal:
In early June, the scooter was sent back to me again with status of warranty: cancelled. I responded to NIU, explaining that no proof of firmware tampering had been presented and that, unless I received formal justification, I would order an independent technical assessment and take legal action.

Shortly after this message, NIU Support contacted me again — stating that my case is in fact covered under warranty, and they requested that I send the scooter back to the service center once more.

Current status (24 July):

Scooter sent back to the service center (again)

Still not repaired

Service center remains unresponsive

NIU now says the repair is on hold due to lack of spare parts

I have no information on where my scooter is or when it will be fixed.
Reference number: lERjgihL

As of 11 August, no one has contacted me, and the scooter remains in "Repair" status. I send emails and receive the same response that my case has been forwarded to management, but no repair date or meaningful update has been provided.

January 2025 – Online purchase (delivered to Portugal)
From the very beginning, the real-world range was only 12–15 km in ECO mode — far below the advertised 35–40 km.

First warranty claim:
The official NIU service partner checked only battery capacity and returned the scooter without conducting a full range test. The issue remained unresolved.

One week later:
The scooter broke down completely — it wouldn’t move at all.

Second warranty claim:
The service center claimed that I had installed U.S. firmware and that the scooter reached 34 km/h.
They offered no proof and demanded ~70% of the scooter's price to replace the motor and controller.

I repeatedly requested:
proof of modification and a full technical diagnostic report
→ None of this was provided.
I never modified anything — I only used the official NIU app.

June 2025 – Escalation and manufacturer reversal

In early June, the scooter was sent back to me again with status of warranty: cancelled. I responded to NIU, explaining that no proof of firmware tampering had been presented and that, unless I received formal justification, I would order an independent technical assessment and take legal action.

Shortly after this message, NIU Support contacted me again — stating that my case is in fact covered under warranty, and they requested that I send the scooter back to the service center once more.

Current status (24 of July):

- Scooter sent back to the service center (again)
- Still not repaired
- Service center remains unresponsive
- NIU now says the repair is on hold due to lack of spare parts

I have no information on where my scooter is or when it will be fixed

reference number lERjgihL

Review of My NIU KQi3 Sport Experience (EU Purchase)


January 2025 – Online purchase & delivery to Portugal
Range out-of-the-box: only 12–15 km in ECO mode vs. the advertised 35 km.

First warranty submission
The official service center checked only battery capacity, declared the scooter “fine,” and shipped it back. No real-world range test was done.

One week later
Total breakdown: the scooter would not move at all.

Second warranty submission
The service center now claimed the firmware had been “flashed to the U.S. version” and said I must pay ~70 % of the scooter’s price for a new motor + controller.
Proof offered? None.
Any speed spike they quoted (34 km/h) could only have happened on a steep downhill section —not under motor power.

Evidence requested
I repeatedly asked for:
• exact firmware string & build date
• telemetry logs showing sustained speeds > 27 km/h under power
• diagnostic steps followed
→ No technical report was ever provided.

Current status
Warranty still refused; scooter remains with the service center. I have escalated the case via Portugal’s electronic Livro de Reclamações, the Direção-Geral do Consumidor, and the European Consumer Centre network.

My KQi3 Sport may have shipped with a factory defect, yet I’ve been blamed for “illegal modification” without a shred of proof.

I NEVER DID ANY MODIFICATION - Only official app!!!

Total disappointment and loss of money/time.

UPDATE
NIU Support Writes below.
>The KQi3 Sport can cover a distance of up to 24.9 miles (40 km) on a single charge.

I have chosen a flat terrain, E-save mode, good sunny day, and was making an ideal test riding a distances of 500m in both directions. My weight is 76 kg. Instead of 40 km I could barely do 12-14 km. I made a screenshots, send to service. Then send scooter to warranty service - they masured battery and returned scooter as fully working. But the distance on flat terrain was - 12-14 km. After week of ride after returning of scooter - scooter failed.

I send it again. Then they accused me that i modified software. Which I never did. Without technical proof. Now I lost monthes waiting for my scooter, time and money!!! Excalting to consumer protection services now. Will go to court if needed because this scam brand should be consumer oriented and not mess buyers with untested or defective products.

Today I had a reply from service center accusing that I've changed the firmware that's why they want to refuse me in guarantee.

All situation looks bad, I had a scooter not properly working, then it failed. Finally after spending numerous hours of solving the problem (sending scooter, communication) I am accused that it is my fail (which is not). I am just a normal consumer.

MY reply:

Today, the service center sent me the following:

“El software del mando se actualizó a la versión estadounidense (sin límite de velocidad máxima en la UE).
Se comprueba que el cliente ha modificado el SW del patinete para alcanzar mayor velocidad consiguiendo aceleración correcta hasta 34 km.”

"The controller software has been updated to the US version (no maximum speed limit in the EU).
It has been verified that the customer has modified the scooter's software to achieve higher speeds, achieving correct acceleration up to 34 km/h."



My clarifications and formal requests:

No U.S. Firmware Installation
I have never had access to any tool, file, or procedure to install U.S. firmware. I only ever used the official NIU app.

Request for Objective Evidence
Please provide in writing:

The exact firmware version string and build date detected on my scooter.

Telemetry logs or screenshots demonstrating the presence of U.S. firmware and sustained drive-mode speeds above 27 km/h.

A step-by-step description of the diagnostic procedure your technicians followed to conclude a firmware modification.

Suspected Factory Defect
From day one, my scooter’s range was only about one-third of the advertised 35 km on a full charge. I documented this with screenshots and flat-terrain tests under ideal conditions, which I shared with NIU support. When I sent it in for warranty repair, only the battery capacity was checked—no range tests were performed—and it was returned “fully functional,” only to fail completely one week later. This strongly suggests a factory defect in the motor or controller.

Warranty Terms
Your repair terms void coverage for unauthorized modifications, but nowhere do they equate a momentary speed overshoot on a descent with “tampering.” Speed limits are regulatory requirements, not warranty clauses. Please cite the exact section of NIU’s published warranty or repair policy that classifies exceeding 27 km/h as grounds for voiding warranty.

Fairness and Next Steps
Since I have not updated any firmware or performed any modifications, this accusation feels unfair. If NIU still intends to refuse warranty coverage, I will seek justice through independent channels (consumer protection agencies, expert appraisal, etc.). In that case, I require a formal written refusal that:

Quotes the specific warranty clause allegedly violated.

Attaches the concrete evidence (firmware logs, diagnostic reports, photos, dates) supporting that decision.

I look forward to your prompt reply with the requested documentation and expect NIU to honor its warranty obligations absent objective proof of non-factory software.

Order number: #EUNIU9378

I bought a NIU KQ3 Sport scooter in January. I discovered that in ECO mode it would only go about 12–15 km on one battery charge, even though the specifications claim 35 km.

The process of sending it in under warranty was extremely difficult—after months of back‑and‑forth, they finally took the scooter.

At the service center they didn’t perform a detailed diagnosis; they merely said the battery capacity was fine.

One week after I got the scooter back, it stopped working altogether.

I sent it back to the service center again.

This time they diagnosed it, accused me of modifying the software, and issued an invoice for 70 % of the scooter’s purchase price.

I informed them that I never altered any software and that I’ve only ever used the official NIU app as a normal customer. I’m now waiting for their reply.

Overall, I consider this experience a nightmare. Not only have I spent money, but I’ve also wasted enormous amounts of time and energy dealing with poor support. It seems the service centers are either dishonest or simply incompetent—perhaps there’s no proper quality control. What I would expect is that if a brand‑new scooter is defective, they would collect it and repair it quickly, rather than accuse me of unauthorized modifications (which is untrue). If the service center refuses to repair it under warranty, I will not pick it up, and I will remember my entire NIU experience as a total nightmare.

Update:

First Warranty Repair reference number is: OumPTKUH~

Second Repair reference number is: UuE59gW5

My contact data is specified in reference numbers inside niu database.

Can recommend for everyone.

I have a battery issue with my new NQi 3 Sport – it drains too fast, making the scooter unusable. For over a month, I've been trying to send it for repair, but support is not helping. They provided the wrong shipping label (for Spain instead of Portugal), and despite contacting them twice, nothing has changed. Each time I reach out, they tell me to wait 5 days, but after waiting, nothing happens. Support is just stalling instead of solving the issue.

Order #EUNIU9378

Thank you for your feedback, we have informed the relevant team to request a new return label, and they will usually inform us of the result within 5 working days. Once we get the latest progress, we will send you an email with further instructions.

If there is no progress after 5 working days, please email us. We will transfer the case to our responsible team.

I recently bought an NIU KQ3 Sport and took it for three rides. However, I noticed that the range is significantly lower than what’s stated in the specifications. I contacted NIU support and requested instructions for a battery consumption test, which they provided.
After conducting the test under ideal conditions, I found that I could only ride 15 km instead of the 40 km stated in the specs. I sent all the test results to NIU, but they haven’t responded for several days. Just stopped answering.

Scam. Don't buy!

upd. Al realizar el pedido las condiciones fueron: entrega de 4 a 7 días hábiles. En un plazo de 7 días laborables el pedido no se entregó y no se proporcionó ningún número de seguimiento. Me di cuenta de que la tienda no va a entregar la mercancía y eso es scam. Les escribí para devolver el dinero, ahora estoy esperando. Prometieron devolver el dinero en 10 días. Si no lo devuelven, realizarán el reembolso a través del sistema de pago y banco y redactarán una declaración a la Sociedad Española de Protección al Consumidor.

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Total scam based on AI. All models there are employed and have a comission. They are not interested in relations.

Total scam based on AI. All models there are employed and have a comission. They are not interested in relations.

Total scam based on AI. All models there are employed and have a comission. They are not interested in relations.