2,840 Mirai vehicles will need a software update to fix a problem with their fuel cell system.
The Mirai can experience a failure of the fuel cell system when a driver goes down a long hill with cruise control engaged and then hits the gas pedal to quickly accelerate. Toyota says the car could quit because the voltage from the fuel cell boost converter can go beyond its limits and stop the fuel cell system.
The software update should take about 30 minutes to complete, just don't say it's part of a recall. Toyota would prefer to call it a customer satisfaction campaign. 🙄keep reading article "Mirai's Fuel Cell System Needs a Software Update"