Over-the-air update 661.50
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 | 11031927 |
| Published by NHTSA | 2026-05-01 |
| Manufacturer's number | 661.50 |
| Manufacturer's date | 2026-05-01 |
| Campaign id or software version | 661.50 |
| NHTSA component | UNKNOWN OR OTHER |
| Manufacturer's system | EBCM, SRR, LRR, SAM: EBCM (Electronic Brake Control Module), LRR (Long Range Radar), SRR (Short Range Radar), SAM (Side Access Module) |
NHTSA's summary
• Improves traction and stability control when accelerating or on uneven terrain. • Improves braking and stopping performance on low-traction surfaces. • Improves the performance of assisted braking features. • 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 ensure proper opening and closing speed for power doors. • Improvements to longevity for the drive unit used for power doors. • Improvements to the performance of driver assistance features. • 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 CELESTIQ | 2025 |
|---|
Listing a model year does not mean every vehicle of it is concerned: the document says which.