Over-the-air update 661.11
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
| Type | Over-the-air update |
|---|---|
| NHTSA id | 11031833 |
| Published by NHTSA | 2026-05-01 |
| Manufacturer's number | 661.11 |
| Manufacturer's date | 2026-04-10 |
| Campaign id or software version | 661.11 |
| NHTSA component | UNKNOWN OR OTHER |
| Manufacturer's system | ACP2, ECM, LRR: ACP2 (ADAS Compute Platform 2), ECM (Engine Control Module), LRR (Long Range Radar) |
NHTSA's summary
• Improvements to the availability of driver assistance features. • Improvements to start reliability and reduced check engine light activation. • Improvements to turbo system diagnostics. • Improvements to the performance of Automatic Emergency Braking and Adaptive Cruise Control braking. • Fixes to help ensure proper functionality of Forward Collision Alert and availability of driver assistance features.
The document
The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.
| BUICK ENVISION | 2025 |
|---|
Listing a model year does not mean every vehicle of it is concerned: the document says which.