Common module faults include:
Locks going down but popping back up
Indicators not flashing when car is locked or unlocked
Interior lights not working
Red puddle lights in the doors not working
Warning light and symbol comes on in the clocks
This link is very helpful:
http://forums.vwvortex.com/zerothread?id=1542461The part number for the driver door (3dr) is - V6X2 837 014 H - £85.18
The part number for the door lock module rear pass side door (5dr) - V3B4 839 015 A - £78.12
The 8mm triple square bolts that hold the lock in place is - VN 908 005 03 - £0.43 each