Ok, this topic seems to an issue that's been well talked about, the solution seems to be to buy & install blanking plates as a preventive measure, on older models.
But how about a 2011 325d ?
I recently bought a obd adaptor to code some features on the car & I also ran diagnostics after which i got error 'Swirl flap, plausibility: mechanically defective'.
I know that this model as an electronic swirl flap set up but can a swirl flap still be ingested ? Also, is there any other solution other replacing the whole Intake manifold which costs £800+vat: jaw-dropping from MD ?
Any advise greatly appreciated !