At a glance
What can fail
In high road salt areas, corrosion pits can form on front suspension coil springs, potentially causing them to break 1 to 1.5 inches from the bottom. A broken spring could puncture a tire.
What the fix does
Dealers will install guard assemblies to prevent a broken coil spring from puncturing a tire.
Summarized — see the official notice for exact wording, dates, and contacts.