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Hi, I'm new to this website and new to Porsche ownership and was hoping that I could get some help with an issue that's just occurred with the coolant expansion tank of my 04 Cayenne Turbo. I recently purchased this vehicle back in June after selling my range rover. At the time I did quite a bit of research and discovered the issues with the coolant pipes, carden shaft bush, ignition coils etc that were prevalent with the early Cayenne models. After viewing a few vehicles that were less than desirable I eventually found a Cayenne in pristine condition, and more importantly with all the aforementioned work carried out by the dealer. I've been using the Cayenne everyday since and can not fault it. Yesterday as I arrived home I heard a loud popping type noise when I was parking the vehicle. After stepping out I noticed a pool of fluid on the floor, located at the right hand side of the vehicle. On inspection I realised that it was coolant fluid and refiled the expansion tank to try and locate the leak. At first I thought it might have been one of the rubber hoses in and around that area. After removing the airbox to gain access to the area I found that it was the expansion tank that had split (see pics below). Is this a common problem with the cayennes and has anyone else had this issue? I've got to say that I expected a lot more from prestige manufacturer such as Porsche. The expansion tank was only manufactured in Sept 2003 and it should really last the lifetime of the vehicle!! Now, this is were I need your help; I've ordered the part and should get round to fitting it this weekend. Can anyone tell me if the cayenne has a bleed screw of some description and if so where is it located? What is the process for refilling the coolant?