It wasn't like they were showing the failure with the sounds and the proclaimed that the car doesn't work. From what I remember, Jeremy said that car has overheated and has reduced power (then they showed car stopping at the side of the track with the sound, which sounded very much like sound-over effect instead of make-believe real sound). At the time I thought that stopping because of overheating is normal and can happen to any car on the race track.

The "does not work" came later, near the end of the segment, and it was clearly stated, that the car does not work in the real life (because of the charging times), not that it doesn't work literally.