NHTSA (USA)Critical
At a glance
What can fail
When towing a trailer, the integrated trailer module may lose communication with the vehicle, causing brake lights, turn signal lights, or brake function to stop working.
What the fix does
A dealer will update the integrated trailer module software, or the vehicle will receive a software update over-the-air. Both are free of charge.
4,381,878 vehicles affected
NHTSA Campaign #26V104000 — full official notice →Summarized — see the official notice for exact wording, dates, and contacts.