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Discussion Starter · #1 ·
Trying to identify the component with the yellow circular cap in the photos below on an Insignia 2.0 diesel 130bhp. There are two pipes attached to the yellow part, as well as two cables wired to the black plastic part below this. It is fixed to the front of the bonnet bracket above the fans.
This component has begun making a noise at particular rev ranges and when the engine is under no load. Noise is quite load now, very audible above engine, road and radio noise. Also it sometimes buzzes loudly after the engine has been switched off.
Any ideas?



 
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