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The QiCycle Folding Electric Bike is Xiaomi’s first foray into the world of e-bikes. It has a 250W high-speed motor powered by Panasonic 18650 lithium batteries. The Shimano Nexus 3-speed gear hub in combination with the torque measurement sensor gives you up to 45km bike power on a single charge. It also has a trip computer can connect to your smartphones via their special app and is–of course–foldable.

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My Qicycle suddenly has no power assist

The battery level shows it is full and the LCD display shows up normal. Now it is just an ordinary bike with no power assist. The LCD display still shows the speed and watts of the bike when I am padel the bike. The bike has only 150km. Which component I should replace first or how to narrow down the faulty unit? Bike Control unit, torque sensor or the motor?

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I have gone through the IFIXIT tear down tutorial of the bike and there are no fuse to replace.

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Hi, did you solved the problem? I have same one…

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Problem solved! Brake sensor was defected. If there is someone who will have the same problem, just try to disconnect the left & right brake sensors (connectors) between pedal...

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Si,correcto. Sólo desatornillé el sensor del freno izquierdo y funcionó,gracias.pd. Error de fabricación

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what brake sensor are you talking about ?

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@Michal Procházka : what break sensor ? mijia qicycle only has manual break. is there any sensor ? where? can you post a photo here, please ? thanks

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Hi, I have brake sensors under brake lever. The sensors scan brake lever level and when you are braking, it send information to the controller and then controller stop output power to engine... But I have EU version, so, If you haven't wires under brake level, you probably don't have brake sensors.

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Watch YouTube for Xiaomi qicycle fr Dyson bike they found the sensor plug just need tighten n simply…I fixed mine hope it helps

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I have the same problem also. Several e-bike service center don’t know the problem. They said xiaomi too complicated bike and no parts available in my country (jakarta - indonesia). Yesterday I went to another e-bike service center. The technician said he will check one by one. And just know he texted me, he found the problem. It is THE CONTROLLER. And now he is trying to replace with the one that he got in his store. Yes, he will try to modify or whatever to fit the new controller. I hope this will work.

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Hi there, i am.living in Jakarta and I have the same problem. Please advise me your ebike service center. Thx

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Trektown. Please check via google. The phone number I got from google. The technician name Abenk

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Hey, would you be willing to share your contacts for the e-bike service center in Jakarta?

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The store name TREKTOWN at Lebak Bulus. You can google for the right address. The technician name is mr. Abenk

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My qicycle now work perfectly. The problem is the controller. It is locate beside the battery. Only good technician can take it out and fix it. The technician told me to be careful with the controller by not push the bike to hard. It means we cannot use gear 3 when the street is high. Use gear 1 and push the pedal wisely. I hope you understand my english.

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i‘ve had this problem two times.

First time the mud defender i have installed killed one little cable between the motor and the controller. The second time it was more difficult. qicycle app beta told me that one battery cell had 41volts, the other 0 volts. ….but the battery was working in another bike.

I have changed the integrated cable, then the controler, nothing. At last i have changed the computer at the handlebar. That‘s it. The computer was okay, only the yellow cable was broken. Folding a bike is no fun for the cables.

Hope i could help you.

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You have to check the controller. And… it really hard to check it. It locate behind the front lamp. Only an experiece tehnician can do that.

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Hallo!Ich habe das gleiche Problem,habe Controller und Display getauscht aber will nicht Funktionen.Kann Mann für normal Fahrrad benutzen.Wo hat Fahrrad Problem,was soll ich tauschen…Motor..oder welche Sache?

Danke euch.

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Sinclair Yung さん、ありがとうございました!
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