A direct email from Zero Motorcycles to owners probably as a result of this blog post:

SUBJECT: Firmware Release & Ongoing Security Measures

Dear Zero Owners,

March 25th Firmware Update (BMU V20)

On the morning of March 25th, as part of our ongoing improvements, we released a firmware update for select 2022+ Zero models that improves the accuracy of the battery state-of-charge and range display. This update addresses a condition where, over time, the system could overestimate available charge, which in rare cases could lead to the motorcycle shutting down before the display reaches 0%. Following installation, some riders may notice a lower battery percentage or reduced range estimate. This is expected and reflects corrected, more accurate readings — actual riding range is not affected.

See details at zeromotorcycles.com/firmware.

Ongoing Security Enhancements

Separately, we recently became aware of potential issues in our motorcycles’ firmware and are taking steps to address them with your safety and security in mind. This work is ongoing, and we remain committed to strengthening system protections across our platform.

We understand how important trust and dependability are when you ride. Thank you for your continued support.

Sincerely,

The Zero Motorcycles Team