Brose error 72: Motor not detecting pedal force input
The motor controller is not registering any force on the pedals, which means the internal torque sensor has either stopped reporting or is reporting a value the controller cannot use. As a result, the motor assist, walk assist and any torque-based power delivery switch off, and the bike behaves like an unpowered bicycle - heavier and slow on climbs, but still rideable. The display remains live for speed and battery information.
| Drive system | Brose Drive (S, T, C - also used by Bulls, Rotwild, Fantic, BH, Trek Allant) |
| Severity | Dealer needed |
| Keep riding? | Ride with caution |
| Typical cost | Dealer diagnostics usually run €40-80, and a torque sensor or bottom bracket assembly replacement typically totals €150-320 including labour, depending on the bike brand and motor generation. |
Likely causes
- Internal torque sensor failure inside the bottom bracket or motor housing
- Damaged or pinched wiring harness between the motor and torque sensor
- Loose, contaminated or misaligned magnet ring on the crank spindle
- Water or mud ingress into the motor bottom bracket area after wet rides or jet washing
- Worn or loose crank arm altering the sensor reading range
How to fix Brose error 72
- Stop the ride and switch off the system using the control panel button.
- Wait five seconds, then switch the system back on with the same button.
- Roll the bike forward a metre and pedal gently on flat ground to confirm whether assist has returned.
- Switch off again and inspect both cranks, pedals and the motor housing for visible damage, loose bolts or moisture.
- Check that the wiring loom exiting the motor at the bottom bracket is seated, dry and undamaged.
- If the code clears but reappears within one battery cycle, take the bike to an authorised Brose dealer for torque sensor diagnosis and replacement.
Warranty: A genuine torque sensor failure inside the two-year manufacturer warranty is normally treated as a component defect and covered; crash damage, water ingress from pressure washing and worn crank parts are typically excluded.
Typical cost: Dealer diagnostics usually run €40-80, and a torque sensor or bottom bracket assembly replacement typically totals €150-320 including labour, depending on the bike brand and motor generation.
Frequently asked
Can I reset Brose error 72 myself?
Yes. Hold or press the control panel button to switch the system fully off, wait at least five seconds, then power it back on. If the code clears and pedal assist returns, ride normally; if it reappears the torque sensor needs dealer service.
Is it safe to keep riding with error 72?
The motor assist will be cut off, so the bike rides like an unpowered bicycle - heavier but still usable on the flat. Get the fault diagnosed soon because you will have no assistance on climbs, into headwinds or with heavy loads.
How much does a Brose pedal force sensor repair cost?
A dealer diagnostic typically costs €40-80, and a torque sensor or bottom bracket replacement usually totals €150-320 including labour. On bikes under two years old with no crash or water damage, the repair is generally covered under warranty.
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.