Bosch error 450: Internal software error
A software fault occurred in one of the components, most often the display or the drive unit. A restart clears it most of the time; if it recurs, the component needs a software update or replacement.
| Drive system | Bosch BES2 (Purion, Intuvia, Kiox, Nyon) |
| Severity | Dealer needed |
| Keep riding? | Ride with caution |
| Typical cost | A software update session is around 30-60 EUR/USD; a failed display is 150-400 EUR/USD. |
Likely causes
- Software hang in the display or drive unit
- Corrupted firmware after an interrupted update
- Outdated software that has a known bug fixed in a later release
- Failing memory in an older display
How to fix Bosch error 450
- Switch off and on again
- Remove and refit the battery to force a full power cycle
- Test ride; if the code stays away, monitor it
- If it repeats, a dealer should update all components with DiagnosticTool and check which one is throwing the error
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: A software update session is around 30-60 EUR/USD; a failed display is 150-400 EUR/USD.
Frequently asked
Can I reset Bosch error 450 myself?
Yes, by restarting. That is the only user-side reset; a persistent 450 needs a firmware update at the dealer.
Can I keep riding with error 450?
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 450 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.