Following an investigation by the National Highway Traffic Safety Administration, it was determined that BMW must recall almost 89,000 of its turbocharged “Mini” models because it was possible that they could catch fire when the engine is turned off.

The report acknowledged that the hazard was caused by the auxiliary water pump, designed to reduce heat from the turbocharger. The manufacturer reported that the pump’s circuit board may malfunction and allow the board to overheat and the water pump to fail.

BMW has described the recall as voluntary, but under federal regulations an automaker must inform the National Traffic Administration of a recall once it becomes aware of the hazard. The models that are affected by the recall are the 2007-11 Cooper S; 2008-11 Cooper S Clubman; 2009-11 Cooper S convertible; 2011 Cooper S Countryman; and the 2009-11 John Cooper Works, John Cooper Works Clubman and John Cooper Works convertible.

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