Zombie

Sadly, we are cheated a "Brawn of the Dead" pun-reference.

Don't you know?! The dead -- the dead walk the streets of Kalis! And their victims... their victims become like them -- the living dead!Battletrap in City of Fear!, Part 1

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.

Quick list of Transformers zombies/the undead

Generation One

• Flame's army of zombies, which included the undead Impactor
• Optimus Prime
• Starscream
• Playback
• The bodies remote-controlled by Blackjack
• Black Zarak and possibly the rest of the Nine Great Demon Generals

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
• Dark Crumplezone

Fiction

Marvel Comics continuity

So, bereft of its brain module, a Transformer body is just so much circuitry, operable by a powerful computer signal!Ultra Magnus in City of Fear!, Part 2

(Note: Events in italics occurred in UK-only material.)

The deranged scientist Flame used technology to reanimate the dead surrounding the decrepit city-state of Kalis to keep intruders away from his subterranean schemes. Ultra Magnus and the Sparkler Minibots, traveling via dimensional portal to the new home of Emirate Xaaron's resistance movement in Kalis, arrived to find the place vacant and ransacked by beings unknown. After capturing the Decepticon Battletrap in Tyrest and bringing him back into Kalis, their captive shook with fear. The dead walk in Kalis!, he warned. They were all doomed. City of Fear!, Part 1

From Teletraan I: The Transformers Wiki, a Wikia wiki.