NIU Scooter ECU (V3 / V35S / V35NB)

Description

Lost all NIU scooter remotes? Check ECU replacement

If no compatible working remote remains, the remote-copy service cannot make another one. For supported NIU scooters, the V35NB replacement ECU includes two remote fobs, allowing remote start without a mechanical ignition key. Confirm the scooter and ECU model with us before ordering. The available listing is for V3 / V35S / V35NB; ask us if you meant a different model such as “V25 MB”.

Before buying: This Chinese-market replacement ECU does not provide the overseas SIM connection used by the original NIU connected services. After installation, the NIU app, remote app functions, GPS tracking and location feature will not work. The supplied physical remote fobs can still start a compatible scooter.

Still have one working remote? Copy a spare remote instead. Need a mechanical key? Order a key from a clear photo or, for NGT / N1S without a usable photo, see the replacement ignition lock.

NIU Scooter ECU (Electronic Control Unit) Replacement

The NIU Scooter ECU (Electronic Control Unit) is the central control module of the scooter. It manages essential functions such as starting and shutting down the scooter, communication with the dashboard, app connectivity, and GPS tracking. If the ECU fails, the scooter may not start or communicate with the NIU app.

Lost both NIU scooter remotes? V35NB replacement ECU

The V35NB replacement ECU can be used if you have lost both original remotes for your compatible NIU scooter. It comes with two remote key fobs and enables remote start using the supplied fobs, without a mechanical ignition key. This remote-start function uses the key fobs; it does not restore NIU app connectivity.

If your scooter displays Error 67 or Error 99, the ECU is one of the most common causes. An ECU fault is one possible cause; diagnose the scooter before ordering a replacement.

For scooters equipped with the V3 ECU, we will supply a V35NB ECU as the replacement, as it is the recommended upgrade and is compatible with these models.

For the V35NB version, the package also includes:

• Two remote key fobs.
• No mechanical key is required to start the scooter.

Important Notes

• Every country uses a different cellular SIM configuration. After replacing the ECU, the original NIU app functions (including GPS and remote connectivity) will no longer work.
• The scooter itself will continue to operate normally after installation.

Video Guides

NIU ECU Replacement (Error 67 & Error 99):

How to Install a New NIU ECU:

 

Installation & Demo Videos

Product video: NIU error 67 or 99 diagnosis

Watch this EScootParts video for a demonstration, installation guidance or more product details.

Watch on the EScootParts YouTube channel

Product video: NIU N1S ECU V35NB upgrade

Watch this EScootParts video for a demonstration, installation guidance or more product details.

Watch on the EScootParts YouTube channel