Core Points - The National Highway Traffic Safety Administration (NHTSA) has initiated a probe into over 1.4 million Honda and Acura vehicles due to engine failure risks, following hundreds of driver reports [1][2] - The recall affects approximately 1,410,806 vehicles, including specific models from 2016 to 2020 [1][4] - The investigation was prompted by 414 reports of engine failures linked to faulty connecting rod bearings, which hold the crankshaft and connecting rod in place [1][2] Vehicle Models Affected - The affected models include: - 2018-2020 Acura TLX - 2016-2020 Acura MDX - 2016-2020 Honda Pilot - 2018-2020 Honda Odyssey - 2017-2019 Honda Ridgeline [4] Investigation Details - The NHTSA previously closed an investigation after determining that the engine failures were not due to the same manufacturing defect identified in Honda's 2023 recall [6] - The new probe aims to evaluate the scope and severity of the engine failure issue and assess potential safety-related concerns [6]