Nissan Murano Car Jerking or Shutting down

What was the code? Did they even try to run a live data scan? Second problem maybe the gear selector switch going bad as it should show when you select manual shift mode.

When driving on the open road, when this happens is it when you hit a bump? When you come to an intersection or round about is that when turning? The car's twenty years old and I'd suspect that this is nothing more than a defective ignition switch momentarily losing electrical connection at those times. And this is a pretty common problem. Next time this happens see if it affects the dash lights.

I think your alternator needs replaced! My Murano was lurching and jerky and had little power with shifting problems. The alternator was bad and that caused my battery to go bad. Since replacing both now it drives and runs great!