Wanted some advice please.
Bought a 2016 330d from main dealer couple of months ago. a few weeks later, could hear a whooshing sound on acceleration (not the usual Turbo whistle). Took it back, they apparently did all the tests but couldn't find anything wrong. They said all the intake hoses etc were fine. Eventually I insisted it was abnormal (compared head-to-head to other similar models), and they agreed, and they ended up replacing the turbo (under warranty). This seemed to sort the noise out.
But now 3 weeks later, it's returned.
Not sure sure what to do. I am 100% sure it's abnormal. It's becoming a headache. Am I within my rights to return it for a refund? I'm happy to get an independent garage to check it out if need be.
Thanks.