Bosch Nyon: set the display brightness and night mode
The Nyon has automatic brightness via its light sensor with a manual level available; a dark colour scheme comes on with the lights. One minute.
Step by step
- Settings (gear) > 'System settings' > 'Brightness' (BUI275: Settings > 'Display').
- Choose 'Auto' or drag the slider to a fixed level.
- The dark scheme (night mode) switches automatically when the bike lights are on; some versions let you force it under the same menu ('Color scheme').
- Back with the back arrow.
Tip: Auto is best; set a fixed high level only if a phone mount shades the sensor at the top of the Nyon.
Can't find it?
If the screen stays dim, clean the light sensor on the front edge and check Auto. A screen that stays black although the bike is on is a holder-contact or cable issue, not brightness.
Frequently asked
Does brightness affect range?
Marginally; the Nyon draws a couple of watts.
Why does the Nyon dim by itself?
Auto brightness reacting to ambient light.
Can I force night mode?
On most software versions yes, under System settings > Color scheme.
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: change assist modes and customise them (BUI350)Bosch Nyon: activate and use eBike LockBosch 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.