Toyota plans to service about 378,000 2004-07 Prius vehicles in the U.S. over a potential coolant circulation problem, according to Reuters.
In the affected vehicles, the electric water pump may allow air bubbles to circulate, which could slow down the cooling of the hybrid drivetrain. In some vehicles, the hybrid components may overheat, causing the engine control module to switch the Prius to “fail-safe” mode, which will reduce the vehicle’s overall performance.
Toyota will begin notifying U.S. customers in early December but it may not push the fix through the typical recall channels. We will keep you apprised of the latest developments once Toyota or the National Highway Traffic Safety Administration releases an official statement.