My car has developed a sort of quiet whining/howling noise especially when coasting down hill. Pirelli scorpio zero's are down to about 3.5 -4 mm but not sure if that's the problem. The noise seems to emanate from the front of the car any Suggestions?

Thanks in anticipation. MY 09 GS manual in Lago Grey, Wood Co arm rest and side bumper strips - now sold.

MY 15 SD4 SE Auto Orkney Grey with colour coded Bumper Door Mouldings

Intercooler pipe split ?

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