If it’s the same as the non-electric then it’s very easy. Took me longer to get the bottle jack out of the van to support the door than it did to swap the bracket.Passenger side electric sliding door lower roller, mine has seized and flatted off, discovered this as my door refused to shut at the weekend. Looks like an easy job to replace it.
Little tip-the holes are slotted so draw around the bolt heads with a fine sharpie pen or similar before removing the old bracket so the replacement goes back in the same place.