The idle control module can cause intermittent idle issues due to cracked solder connections. It is a black plastic box measuring 4 X 4 X 1 1/4 inch and is mounted in the dual firewall area. Part number is 002 545 40 32 (replaces 002 545 07 32) for the Euro and 002 545 33 32 for North America. I'm not sure if they are interchangeable as I don't have a wiring diagram for the European version. It might just be a difference in calibration for emissions.