NEW YORK -- U.S. auto safety regulators are investigating complaints that transmission cooler lines can leak fluid in some 2013 Nissan ( NSANY) Pathfinders and Infiniti JX models, leading to a sudden loss of transmission power. The National Highway Traffic Safety Administration says it has received reports of problems from five owners of Pathfinders. No injuries have been reported. The investigation covers an estimated 110,000 cars. NHTSA has begun an evaluation to assess the size and safety-related consequences of the issue. Such investigations can often lead to recalls. Nissan said it has received a request for information from NHTSA stemming from the reports of leaks. Spokesman Steve Yaeger said the company was working with the agency to address questions. In addition, he said a repair procedure has already been developed for use by authorized Nissan and Infiniti dealers for vehicles that have the problem. The Nissan Pathfinder and the Infiniti JX are both sport utility vehicles.