We are working on a 2008 Porsche Cayenne V8 Turbo. The vehicle developed a coolant leak behind the engine against the firewall. After painstakingly gaining access, we found that a cheaply made plastic coolant tee connector had become brittle and failed. We obtained a parts schematic from Porsche but nothing in the diagram looks like this. This part is probably a Volkswagen part as the Touareg is built on the same platform. We could install a brass tee with hose barbs on it in place, but will give the dealer more time to produce the correct part. We may find that the part is available only as a hose assembly. We will add the correct part number and a picture of the new part when we find it.