How often should I replace my e-bike helmet?

Replace your e-bike helmet every 3 years if you commute daily, or every 5 years for occasional use, even without crashes. Replace immediately after any crash where the helmet impacted a surface, even if damage isn't visible—EPS foam compresses irreversibly on impact. Also replace if you notice cracks in the shell, loose components, degraded padding that can't be replaced, or if the retention system no longer holds securely. Daily commuters should be especially vigilant about replacement timelines, as sweat, UV exposure, and temperature cycling degrade the foam faster than occasional recreational use.