# NHTSA opens defects investigation PE25012 into Waymo 5th-gen ADS (Oct 2025) revision history

Append-only Arc G field-change log. Forward-only honesty: events accrue from Arc G adoption.

Incident: [NHTSA opens defects investigation PE25012 into Waymo 5th-gen ADS (Oct 2025)](/incidents/nhtsa-waymo-pe25012-investigation-2025.md)

_No events on file. Arc G is forward-only; the recorded event log accrues from Arc G adoption. For the current state of this incident, see the incident page._

## Forward-only note

Arc G is forward-only. The event log accrues from the Arc G adoption point. Fields with no events post-baseline equal the current cached value and are not independently verified at any prior date.

_Canonical URL: /incidents/nhtsa-waymo-pe25012-investigation-2025/history. REST: /v1/incidents/bfaf2579-b80c-4cbb-bcd6-7d0170e4559d/history. HTML: [/incidents/nhtsa-waymo-pe25012-investigation-2025/history](/incidents/nhtsa-waymo-pe25012-investigation-2025/history)._