02-10-2012, 04:35 PM
The solenoid is used to transfer a vacuum feed to the dumpvalve which opens the valve. The reason I stated it being an Audi one is because I've had 5 different one's from the scrapyard and none worked but this one did (German engineering for you
) plus on ebay the go for around £25 by the looks of things.

Stage 2 XUD Sedan