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 repairedService center remains unresponsiveNIU now says the repair is on hold due to lack of spare partsI have no information on where my scooter is or when it will be fixed.Reference number: lERjgihLAs 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.
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