Bosch eBike Systems
Motor / drive
540
Drive unit temperature error
The drive unit is outside its permissible temperature range — usually too hot after long, steep climbs in high ambient temperatures, more rarely too cold in winter. The system shuts assistance down to protect itself. After cooling down (or warming up) and a restart, the drive normally works again without repair.
- Drive system
- Bosch eBike Systems
- Category
- Motor / drive
- Motor behavior
- assist off
- DIY-friendly?
- possible
Roadside self-help
- Stop and switch the system off
- Let the drive unit cool down (or warm up) for 10-15 minutes, ideally in the shade
- Restart the system
Possible causes
- Overheating from sustained high load (long climbs) high
- High ambient temperature / direct sun medium
- Extreme cold low
Symptoms
- Error 540 on the display, typically during or after a hard climb
- Assistance switches off
Inspection / repair
- Difficulty: easy
- DIY: possible
- no dealer tool needed
- Component: drive unit
Applies to
Gen2-Gen4 (BES2/BES3)
Displays: Intuvia/Purion/Kiox/Nyon