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My left fuel (primary) pump went out on my 2004 Cayenne S, when I went to order the parts from www.sonnenporscheoemparts.com they said Porsche updated the fuel pumps and I would have to replace both because the old fittings will not fit to the new pumps. Is anyone aware of this update, have they installed a old fuel pump with a new one... or is it just best off to replace both at the same time anyway as if one goes out the other will be going soon also? Also I pulled fuse number 14 so I can drive with just the right fuel pump, does anyone know how long I can drive like this, parts wont come