VanMoof error 40: Bell button pressed too long or too often
VanMoof S3 / X3 (also S5 / A5 where applicable)Fix at homeSafe to keep riding
The left handlebar button (bell) has been held or pressed so many times that the firmware flags it as stuck. Nothing is broken in the drive system; the bike keeps riding. The code exists to catch a jammed button or a short in the button wiring.
Likely causes
- Button physically stuck after a crash or a knock against a wall
- Dirt, ice or road grime under the button cap
- Water in the button housing shorting the contacts
- Rapid repeated presses (children playing, or the bell used as an unlock trick)
- Frayed button cable at the handlebar
How to fix VanMoof error 40
- Press and release the button a few times; make sure it clicks and returns freely
- Clean around the button with a soft brush and a little water on a cloth; do not use a pressure washer
- Switch the bike off and on to clear the code
- In freezing weather, bring the bike inside to thaw the button before assuming it is broken
- If the button stays stuck or the code returns without pressing it, the button module needs replacing: independent VanMoof-capable shop
Go to a dealer if: Go to a shop only if the button is mechanically stuck or the error keeps appearing without anyone touching it.
Warranty: Warranty from the original VanMoof B.V. died with the 2023 bankruptcy; the relaunched VanMoof (LAVOIE/McLaren Applied) only covers bikes sold by them after the relaunch, so most S3/X3 owners pay for repairs.
Typical cost: Usually free; a replacement handlebar button module is about EUR 40-90 plus fitting.
Warranty: Warranty from the original VanMoof B.V. died with the 2023 bankruptcy; the relaunched VanMoof (LAVOIE/McLaren Applied) only covers bikes sold by them after the relaunch, so most S3/X3 owners pay for repairs.
Typical cost: Usually free; a replacement handlebar button module is about EUR 40-90 plus fitting.
Still stuck? Take a photo of the display and show it to a local e-bike workshop. Bring the bike's system name (e.g. Bosch Performance Line CX) and the exact code; that saves diagnostic time and money.
Frequently asked
Does error 40 stop the motor?
No. It is a warning about the button, not about the drive system.
Can a stuck bell button drain the battery?
Marginally, but the real problem is that a stuck button can confuse the lock and unlock logic. Fix it rather than ignore it.
Why does my bell ring by itself?
Water or dirt shorting the button contacts. Dry the bike and clean the button.
Related VanMoof codes
Not an official VanMoof document. Compiled from workshop experience and public service information; details can differ per system version and bike brand.