Around 33,131 Subaru Imprezas owners in the United States, and 4,216 in Canada will be issued a recall notice as their cars could suffer from engine stalling, due to a vapor lock issue. The affected Impreza sedans and hatchbacks were built between Sept. 13, 2016, and March 15, 2017 with a stop-sale order issued for unsold affected vehicles.
What’s causing the problem is premature vaporization of North American blended winter fuel, which was designed to vaporize at a lower temperature. According to the National Highway Traffic Safety Administration, the fuel was vaporizing in the Impreza fuel line under high ambient temperature, low speed or stopped driving conditions.
This would decrease engine fuel pressure which may lead to rough idling, the inability to start the engine or a stalled engine. If the engine stalls, you would not be able to restart it again for a certain amount of time.
To fix this, dealerships will reprogram the engine control unit to turn on the radiator cooling fan at lower temperatures for free.
Subaru has not released a notification schedule yet, but if you have any questions about the recall you can contact the automaker at 1-800-782-2738, or the NHTSA Vehicle Safety Hotline at 1-888-327-4236.