Citroen C3 engine?

Gola

New Member
On my almost new Citroen C3 Cool I notice a part near the front of the engine that I have not noticed on my privious cars. At it's top end it has what looks like a spark plug with a bright green wire going from it. What is this part please? Am I right in thinking that this part was not in such a prominent position in my previous Citroen car engines (Saxo and C3 Desire)?
 
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