Bosch Nyon: change assist modes and customise them (BUI350)
Modes are selected on the control unit; on the Nyon BUI350 (Smart System) you can tune each mode in eBike Flow, on the BUI275 the modes are fixed. Five minutes in the app.
Step by step
- Select modes with + / − on the control unit (BUI350: LED Remote or Mini Remote; BUI275: the joystick control unit). Works while riding.
- BUI350 customisation: eBike Flow > Settings > your eBike > 'Riding modes'; pick a mode and adjust Support, Max. torque and Dynamics; save. Changes are stored in the drive unit.
- The Nyon BUI350 shows the mode name and, on the ride screen, the current motor power.
- BUI275: no customisation; the shift recommendation can be toggled under Settings > My eBike.
- To restore Bosch defaults on the BUI350, use 'Reset' in the Riding modes screen.
Tip: Tune Tour+ to your commute and leave Turbo stock; Tour+ is where most riders spend their time.
Can't find it?
If 'Riding modes' is missing in eBike Flow, update app and bike firmware; the feature needs 2023 or later Smart System firmware. On a BUI275 eMTB can only be enabled by a dealer in DiagnosticTool on Performance CX motors.
Frequently asked
Can I tune modes on the Nyon BUI275?
No; Classic Line modes are fixed.
What modes does the BUI350 have?
Depends on drive unit and manufacturer: Eco, Tour, Tour+, eMTB or Sport, Auto, Turbo.
Does a custom mode affect range?
Yes; the Nyon's range estimate adapts as you ride.
Manuals and video
- Bosch eBike Help Center: official error-code index
- Bosch eBike downloads: quick start guides and battery guide
- Bosch eBike dealer search (DiagnosticTool readout)
Other Bosch Nyon guides
Bosch Nyon: change the display language (BUI350 and BUI275)Bosch Nyon: switch from mph to km/h (or km/h to mph)Bosch Nyon: set the time (usually automatic)Bosch Nyon: reset the trip distance and ride statisticsBosch Nyon: wheel circumference (dealer-set)Bosch Nyon: activate and use eBike LockBosch Nyon: set the display brightness and night modeBosch Nyon: pair with eBike Flow (BUI350) or eBike Connect (BUI275)Bosch Nyon: update the firmware (Flow, Wi-Fi or dealer)Bosch Nyon: enable and use walk assistBosch Nyon: turn the lights on and off, automatic and always-on lights
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.