Like a few of you out there,
I was getting the faint chirrup sound at cold idle on my ED30, which many suggest was the cam follower/aux belt.
Anyway, booked my car in, and my dealer swapped out the cambelt itself, so either
a) its still going to make the same noise this morning when I go to work, or
b) mine was different and they've fixed it.
Either way, its saved me a few hundred quid that it was going to cost next year when the car will be 4 years old!
They also replaced a leaky rear light cluster.
So all thats left is the drivers side speakers which work intermittently (must be a loose connection), and we're all sorted!