A defect in the hybrid cooling system can cause the engine in the 2012-2013 Infiniti M35 to suddenly shut down:

Nissan confirmed that certain conditions can cause a malfunction in the hybrid cooling system and lead to the engine shutting down. A driver will receive a warning light but if the warning is ignored, the powertrain control module is designed to shut off the engine to prevent engine damage.

The affected hybrids were built between March 23, 2010 and to September 9, 2013. The recall is expected to begin in early September 2016.

Read More on CarComplaints.com