I have a similar problem in as much that I also have an annoying squeak on my 159 from the passenger side front wheel that comes and goes but is becoming more and more frequent. I only noticed this morning that it happens on acceleration and not on lift off or coasting. I had assumed it was a bush of some sort but now have doubts.
I also have what sounds like a very similar problem to yours on my GTV, I think it may have something to do with the brake shield rubbing when the wheel is turned. I have no idea if the 159 even has a brake shield though.
My Lexus, however, continues to run problem free and puts the Alfas to shame in every aspect apart from style and entertainment to drive....
Last edited by Muz; 02-10-15 at 09:48.