Rolls-Royce said that a circuit board could fail and, “in an extreme case,” lead to the “smoldering of the water pump” that helped to cool the turbocharger on the V-12 engine.
In its report (PDF) to the agency, the automaker said that such a failure could lead to a fire, although Rolls said it was not aware of any resulting from the flaw.
Earlier this week, BMW recalled about 32,000 of its turbocharged 12- and 8-cylinder models for the same defect. The BMW Group owns Rolls-Royce, and the Ghost’s engine, a 6.6-liter turbocharged V-12, is related to the 6-liter V-12 in the 760Li, one of the models recalled by BMW.
BMW reported two engine-compartment fires apparently related to the defect, but there were no injuries.
BMW and Rolls described the recalls as voluntary, but under federal law, once a manufacturer was aware of a safety defect it must inform the agency of plans for a recall within five days or face civil penalties.