Bosch error 490: Internal fault in the on-board computer
The display itself has reported an internal hardware or software fault. Assistance often continues, but the display may freeze, reboot or show wrong data. A repeating 490 normally means the display needs replacing.
| Drive system | Bosch BES2 (Purion, Intuvia, Kiox, Nyon) |
| Severity | Dealer needed |
| Keep riding? | Ride with caution |
| Typical cost | Purion about 100-150 EUR/USD, Intuvia 150-250, Kiox or Nyon 250-400, plus fitting. |
Likely causes
- Internal electronics failure in the display
- Water ingress after heavy rain or washing
- Corrupted firmware
- Physical damage after a drop
- Very cold or hot conditions causing a temporary fault
How to fix Bosch error 490
- Switch off, remove the display from its holder, wait a minute and refit it
- If the display has been wet, leave it to dry indoors overnight
- Restart and test
- If the code returns, a dealer should try a firmware update and, if that fails, replace the display
Warranty: Bosch drive units, batteries and displays carry a 2-year manufacturer warranty in most markets; a genuine internal fault within that period is normally replaced free through the dealer.
Typical cost: Purion about 100-150 EUR/USD, Intuvia 150-250, Kiox or Nyon 250-400, plus fitting.
Frequently asked
Can I reset Bosch error 490 myself?
Only by restarting. If the internal fault is permanent, the display has to be replaced; there is no deeper user reset.
Can I keep riding with error 490?
Usually, but with reduced or interrupted assistance and the risk of the system shutting down mid-ride. Ride home carefully or on muscle power alone; do not plan long rides until the cause is found.
Is error 490 covered by warranty?
Bosch drive units, batteries and displays carry a 2-year manufacturer warranty in most markets; a genuine internal fault within that period is normally replaced free through the dealer.
Related Bosch codes
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)
Not an official Bosch document. Compiled from workshop experience and public service information; details can differ per system version and bike brand.