NHTSA (USA)Critical
At a glance
What can fail
The connection between the rear height sensor and rear axle can disconnect, causing the sensor arm to jam between the axle and brake pipe. This damages the brake pipe and may cause rear brake failure.
What the fix does
Install retention clips on the ball socket connections, add a down stop to the sensor arm, and add a shield on the rear axle.
NHTSA Campaign #91V207000 — full official notice →
Summarized — see the official notice for exact wording, dates, and contacts.