TECHNICAL SERVICE BULLETIN: DRIVE UNIT INSPECTION & REPLACEMENT FOR EV MOTOR RUMBLE NOISE - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides the procedure to inspect and repair the EV motor drive unit and reduction gear on some 2019MY~ Niro EV (DE EV) vehicles produced from December 5, 2018, which may exhibit an abnormal rumble noise while driving (refer to noise sample videos below). The rumble noise may be heard repeatedly when the traction motor is operating, while driving slowly in "D" range, or when slowly accelerating/decelerating between 0~25 mph.
