Brose error 80: Brose motor parameter error on display
The motor control unit has detected an invalid or corrupted parameter set inside the drive. As a result the pedal assist cuts out, the speed reading usually drops to zero and walk assist no longer responds. The bike effectively behaves like an unpowered bicycle until the fault is cleared.
| Drive system | Brose Drive (S, T, C - also used by Bulls, Rotwild, Fantic, BH, Trek Allant) |
| Severity | Dealer needed |
| Keep riding? | Do not keep riding |
| Typical cost | Expect a dealer diagnostic around 40 to 80 EUR, a firmware or parameter reflash roughly 30 to 60 EUR, and a motor control board replacement if needed in the 250 to 450 EUR range including labour. |
Likely causes
- Corrupted firmware parameter block after a software update or battery swap
- Loose or oxidised connector between the motor and the control panel
- Moisture ingress in the motor housing or display cable loom
- Internal EEPROM fault on the motor control board
- Battery voltage spike during charging that confused the parameter check
- Wiring damage near the bottom bracket from a crash or transport impact
How to fix Brose error 80
- 1. Switch off the system completely using the control panel button and wait 10 seconds.
- 2. Switch the system back on with the same button and check whether code 80 clears on the next startup.
- 3. If the code returns, remove the battery, inspect the motor and display connectors for moisture or corrosion, and reseat them after drying any damp contacts.
- 4. Refit the battery and run a fresh power-on cycle to confirm the fault is gone.
- 5. If code 80 reappears, do not attempt further resets and take the bike to an authorised Brose dealer for a diagnostic read and parameter reflash.
Warranty: A genuine parameter or control board fault inside the two-year warranty window is normally covered, while water ingress, crash damage and aftermarket wiring faults are treated as owner responsibility.
Typical cost: Expect a dealer diagnostic around 40 to 80 EUR, a firmware or parameter reflash roughly 30 to 60 EUR, and a motor control board replacement if needed in the 250 to 450 EUR range including labour.
Frequently asked
Can I reset Brose error 80?
Yes, start by switching the system off and on again with the control panel button. If the code returns after that single reset, repeated power cycling will not help and the bike needs a dealer diagnostic to rewrite the motor parameters.
Is it safe to keep riding with error 80?
No, the motor assistance is shut down and the bike behaves like a normal unpowered bicycle, so hills and traffic become harder to manage. The fault can also recur without warning, which is why riding should be avoided until it is cleared.
How much will the repair cost and is it under warranty?
A dealer diagnostic and parameter reflash typically runs 70 to 140 EUR combined, while a motor control board replacement can reach 250 to 450 EUR. If the bike is within the two-year Brose warranty and the fault is a genuine component issue, the dealer repair is normally covered at no cost.
Related Brose codes
Manuals and video
Official source: Brose error code table, Pedego dealer service guide
Not an official Brose document. Compiled from workshop experience and public service information; details can differ per system version and bike brand.