The National Highway Traffic Safety Administration (NHTSA) has opened an investigation that could lead to over 4,000 2005-2006 Lotus Elise vehicles being recalled. Reports filed with the NHTSA stated that while driving, the oil cooler line failed, resulting in a spray of oil in the engine compartment. Driver complaints consist of smoke developing in the interior of the vehicle, loss of vehicle control because of oil leakage on a tire, and one complaint was reported to have resulted in an engine fire. The NHTSA is not aware of any injuries related to this problem.