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Loud Air Sucking From Engine With Bonnet Open

Matt92
in BMW 1 Series Forum

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Hi I have a 2007 120d m sport 3dr I am just wondering when I have the bonnet up and rev there's a very loud air sucking sound which I think is the turbo or air intake but I have had turbo diesels before and they have not been anywhere near this loud, just wondering if this is normal or if maybe a pipe could of came loose. Thanks

  • Quote

    If it still has the standard airbox then you have an intake leak or other loose pipework ;)

    If it has an aftermarket induction then the same applies but will be easier to find...

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