# 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

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11031927-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11031927-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Vehicles listed

- 2025 CADILLAC CELESTIQ

JSON: [/v1/bulletins/11031927](/v1/bulletins/11031927)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Over-the-air%20update%20661.50&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F11031927&vehicle=Over-the-air%20update%20661.50)