NHTSA (USA)High Risk
At a glance
What can fail
A coolant system component can malfunction or fail, causing coolant temperature and system pressure to rise significantly.
What the fix does
Dealers will install a thermostatic bypass valve to control heater core temperature and replace the radiator cap with a new design that manages pressure and overflow.
NHTSA Campaign #93V015000 — full official notice →
Summarized — see the official notice for exact wording, dates, and contacts.