Do Movie TFs Need To Consume Nutrients?

I think it has been mentioned that the movie Transformers are biomechanical. Not organic. They are just composed of billions of self-replicating nanites just as we are composed of billions of self-replicating organic nanites: cells.
How does a TF repair itself if damaged, especially if that damage involves missing material? Let's say a TF gets cut, blasted, whatever, and material gets removed from it as a result.
Let's the TF is like us, and heals by having its nanites make many more nanites at the site of injury, thus eventually healing the injury. With material missing and extra material and energy needed to heal an injury, wouldn't it be logical that the TF has to obtain that material from somewhere? Wouldn't the TF have to eat in a sense, at least when its injured? Wouldn't the TF have to consume whatever materials his or her nanites are made out of just like we have to consume proteins for our cells to repair themselves and replicate?
Also, if TFs are made out of billions of nanites, do their nanites live forever? Or do their nanites, like ours, have to replace themselves every so often to keep the robotic organism functioning. Every so many months, I think, we replace all of our cells. Are TFs like us in this regard? If so, one would think that in addition to requiring energy, a TF would need a regular supply of nutrients to do this.
How does a TF repair itself if damaged, especially if that damage involves missing material? Let's say a TF gets cut, blasted, whatever, and material gets removed from it as a result.
Let's the TF is like us, and heals by having its nanites make many more nanites at the site of injury, thus eventually healing the injury. With material missing and extra material and energy needed to heal an injury, wouldn't it be logical that the TF has to obtain that material from somewhere? Wouldn't the TF have to eat in a sense, at least when its injured? Wouldn't the TF have to consume whatever materials his or her nanites are made out of just like we have to consume proteins for our cells to repair themselves and replicate?
Also, if TFs are made out of billions of nanites, do their nanites live forever? Or do their nanites, like ours, have to replace themselves every so often to keep the robotic organism functioning. Every so many months, I think, we replace all of our cells. Are TFs like us in this regard? If so, one would think that in addition to requiring energy, a TF would need a regular supply of nutrients to do this.