Over-the-air update 661.21
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 | 11031812 |
| Published by NHTSA | 2026-04-30 |
| Manufacturer's number | 661.21 |
| Manufacturer's date | 2026-04-28 |
| Campaign id or software version | 661.21 |
| NHTSA component | UNKNOWN OR OTHER |
| Manufacturer's system | CGM, AMP, AOS, EBCM, LRR, FCM, SRR, SBZA: CGM, AMP, AOS, EBCM, LRR, FCM, SRR, SBZA |
NHTSA's summary
• Improvements to interior audio quality and volume consistency. • Improves traction and stability control when accelerating or on uneven terrain. • Improves braking and stopping performance on low-traction surfaces. • 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. • Fixes to help protect battery life. • Improvements to provide more accurate speed limit detection on the driver’s display. • Fixes to help ensure driver assistance features remain functional when the windshield freezes. • Fixes to help ensure accurate driver display messages and alerts.
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.
| CADILLAC LYRIQ | 2024 |
|---|
Listing a model year does not mean every vehicle of it is concerned: the document says which.