Ram parent company Stellantis has issued a recall for an estimated 306,165 units of its HD pickups and chassis-cab trucks in the US market with the 6.7-liter Cummins diesel engine that could catch fire. They are specifically from model years 2021 through 2023 and have an intake grid heater relay that could overheat and catch alight.

Ram is concerned enough about the potential for a fire that it has requested affected owners to avoid parking their trucks inside their garages. Leaving them parked on the driveway is ideal until the problem is resolved. These trucks include the 2500 and 3500, as well as the 3500, 4500, and 5500 chassis cabs. Their common denominator is the Cummins diesel engine.

Stellantis says it is aware of at least six fires that could be related to this specific issue. Of those trucks, five fires took place while the trucks were running. The good news is that the fire risk is "minimal," but the automaker, rightly so, is not taking any chances. The recall has been issued in conjunction with the National Highway Transportation Safety Administration (NHTSA), and affected owners will begin to be notified in March.

The recall notice states that the fix involves an electrical connector that will need to be replaced by a Ram technician. As with any recall, this will be done completely free of charge.

This is not the first time the automaker has issued a recall regarding the heater-grid relays for its HD trucks. There were two previous but smaller campaigns. In March of 2021, nearly 20,000 trucks were recalled, and the following October, another 130,000 units were issued a recall.

Ram HD trucks have been recalled for other fire-related issues as well. A 2021 campaign affected over 220,000 trucks manufactured between 2019 and 2020 for defective fuel pumps, which, in some cases, resulted in fuel leaks, altered drive quality, and unusual engine noises.

Last November's recall involved around 280,000 examples from the 2020 to 2023 model years, again with the Cummins diesel, over a pressure build-up and heat inside the transmission. The concern was a potential transmission fluid leak from the dipstick tube, and this, too, could have potentially led to a fire.