NHTSA (USA)Critical
1990 DODGE MONACONHTSA Campaign #94V006000
The official notice
Defect
THE END CAP CONNECTING THE HEAT EXCHANGER'S CORE TO THE ENGINE COOLING SYSTEM COULD RUPTURE AND ALLOW HOT COOLANT TO ESCAPE INTO THE PASSENGER COMPARTMENT.
Safety Risk
THE COOLANT ESCAPING INTO THE PASSENGER COMPARTMENT COULD CONTACT THE DRIVER'S FEET AND INJURE THE DRIVER. ALSO, STEAM FROM THE HEATER LIQUID WILL CLOUD ON THE WINDOW SURFACES AND IMPAIR THE DRIVER'S VISION. IN EITHER CASE, FAILURE OF THE HEATER CORE END CAP COULD RESULT IN A VEHICLE ACCIDENT.
Remedy
A COOLANT TEMPERATURE CONTROLLED HEATER CORE FLUID BYPASS VALVE WILL BE INSTALLED.
Updated June 10, 2026