Does your Nanny use her own car while on-the-job?
If so, yes I definitely would assist her w/funds to repair her vehicle.
If she doesn’t, sure you can always offer as a gesture.
Just make sure to clarify whether the money is a gift or an actual loan.
When my car broke down, my boss offered to forward me some of my upcoming paychecks to help pay for it.
But that is after I acknowledged that it was going to be a tough expense to incur.
You sound like a wonderful employer OP to care so much for the one who cares so much for your loved one(s.)
