1.03M units affected, pretty big.
Quote
An engine wire harness connected to the power control unit is at risk of wear over time, potentially leading to a short circuit or even a fire, the company said in a statement. The recall affects every one of the current-generation Prius, including a plug-in variant, and the hybrid version of the C-HR made until May of this year. The latest Prius began production in 2015 and the C-HR debuted in December 2016.
Great, now they don't only just spontaneously accelerate but they also spontaneously combust!
Not sure how a wiring harness inside the car wears out. It shouldn't be moving. If it moves then the wires can fatigue and fail. Bet the fix is something minor, involving a bit of tape or some sort of support.