A buddy of mine who works at a mechanics recently removed the CDV from my '09 23i (brill mod, well worth it). Since then however there seems to be a vibration type sound coming from over my shoulder area which is REALLY annoying.

So far I've gone at the following with some grease spray:
- Center arm rest
- Dash cubby hole (Where the iDrive screen normally is)
- Roof arms
- Door hinge (On the actual door)
- Door lock (The metal hook type thing on the car itself where the tyre pressure sticker is)
- Back/Front window seal (The piece of rubber that lines the length of the rear window)
- Around the dash and speedo area
- Seatbelt feeder (not sure what its called!)
- Speaker and speaker cover behind drivers seat
Needless to say the car stank for a while, but doing the above actually cleared up some creaking when going over speed bumps. However the vibrating noise is still there and right in my ear so difficult to ignore. I only really get it when driving over poor road surfaces, but living in Kent, this is basically everywhere.
My suspicions are either a loose screw inside the drivers door itself, or perhaps the undertray wasn't reattached securely enough. Thing is the vibration sounds like its right in my ear, so could even be the window? It's definitely not the speakers as it happens when they're on mute.
Has anyone had a similar experience or tips to resolve? It's driving me insane and is spoiling the driving experience.
