Zombie

Although Transformers are often rebuilt or otherwise brought back from apparent death, there are also many examples of them being partially reanimated as zombies, either self-aware or under the control of another.

Generation One Era
Impactor and Flame's army of zombies Optimus Prime Playback The bodies remote-controlled by Blackjack

Note: Metrotitan is not a reanimated Metroplex as is commonly believed.

Beast Era
Galvatron Optimus Primal's original body Tarantulas The bodies inhabited by Megatron

Unicron Trilogy
Dark Scorponok Starscream