For just over a year, Ram has been investigating a problem with a number of 2021 model-year heavy-duty (HD) pickup trucks. The automaker is responding to reports of trucks experiencing fires in the engine compartment.
For a reason not yet identified, even when the engine is off, the solid-state intake heater relay in Ram trucks equipped with the Cummins 6.7L (turbo) diesel engine can short-circuit and catch fire. In March of this year, the company planned to recall about 20,000 vehicles in the U.S. and Canada because it believed the problem was limited to trucks with unprotected relays. In May, however, Ram discovered that the problem was occurring even in trucks with protected relays.
As a result, the company is preparing to recall 131,177 models from the 2021 and 2022 model-years.
Here are the models affected by the recall: