I would say that 004 is the bottom ball joint.
003 is the track control arm outer bush, the larger one of the two. I'm presuming this is on your Capri. If it is then they have failed it on the wrong item, it's not a torsion bar it's an antiroll bar. If your unsure on an MOT you should ask to speak to the tester......and if I was the tester I would run away and hide