Any electric motor with a high amperage draw will create a significant EMF. I’m reasonably sure that these cars have shielding in place to cut down on the amount that makes it out to other parts of the car, but I have to imagine that the EMF produced in a hybrid vehicle is significant. If you are asking that question in relation to health issues… well, I would challenge you to find any conclusive study that says EMF (especially at the levels produced by a hybrid) poses a significant health risk.