Hi everyone. I am a proud owner of a 4.2 V8 TDI Touareg. Love the car to bits. Unfortunately the slave ECU needs replacing. Been trying to find the exact ECU replacement for the last two weeks. No luck. I have been told the HW number must be the same for both master and slave. Mine is HW:H17. Can't find an H17 anywhere, but quite a few H19's available. Does anyone know whether this is correct? Don't want to buy both if it's not needed. Problem is, I need to import. Can't really buy one, wait two weeks for it to arrive, and buy another one if it doesn't work. Any advice is greatly appreciated.