Energon convertor

An energon convertor is an aspect of Transformer anatomy that is comparable to a human heart.

Fiction

The Transformers cartoon

After destroying the robotic insecticide, which was the only way of destroying the Insecticon clone army, Megatron cynically said that the act broke his energon convertor which caused Starscream and Soundwave to laugh. Quest for Survival

IDW Generation 1 comics

When an Arachnosaur attacked Wheelie on LV-117, it bit into his energon convertor. The creature was shocked by a jolt of energon and ran off, while Wheelie was forced to repair his convertor. Spotlight: Wheelie

Dreamwave Armada comics

Liftor's energon convertor once exploded on him. It was as unpleasant as it sounds. Armada #5