What is the difference between error 460 and error 490?

In Bosch documentation, both cover display or control unit internal errors. Error 460 is more associated with display processor faults, error 490 with HMI communication bus and configuration errors. The fix procedure is the same for both.

How much does a Bosch display cost to replace?

Purion: approximately EUR 80. Kiox: approximately EUR 150. Kiox 300/500: approximately EUR 200 to EUR 280. Nyon: approximately EUR 250 to EUR 400.

Bosch E-Bike Error 490: Control Unit Internal Error Fix

Bosch E-Bike Error Code 490: Control Unit Internal Error

Marcus Heidler March 20, 2026 5 min read @MarcusHeidlerEbike

What Error 490 Means

Error 490 signals an internal fault in the control unit — the display or remote head unit. Error 490 covers a slightly broader range of HMI failures than error 460, including internal communication bus faults within the display housing and configuration data corruption.

Fix Procedure

Step 1: Power Cycle

Remove the main battery for 60 seconds. With the battery out, press and hold the display power button for 10 seconds to drain residual charge. Reinstall the battery and power on.

Step 2: Address the Display Backup Battery

Error 490 is frequently linked to a depleted display backup battery. If your bike has been stored for an extended period without the main battery, the display backup battery may have fully discharged, causing configuration data loss and triggering error 490 on the next startup.

Step 3: Firmware Update

Apply any pending display firmware updates via the eBike Flow app (Smart System) or through a dealer (System2).

Step 4: Display Replacement

Persistent error 490 after all above steps indicates a failed display PCB requiring replacement.

Marcus Heidler @MarcusHeidlerEbike

Bosch eBike Systems Specialist

Former Bosch eBike technician with 11 years of field experience. Certified in Performance Line CX diagnostics and Smart System integration.

Frequently Asked Questions

: In Bosch documentation, both cover display or control unit internal errors. Error 460 is more associated with display processor faults, error 490 with HMI communication bus and configuration errors. The fix procedure is the same for both.
: Purion: approximately EUR 80. Kiox: approximately EUR 150. Kiox 300/500: approximately EUR 200 to EUR 280. Nyon: approximately EUR 250 to EUR 400.