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No but just got the Cayenne back with the new pumps and it runs much better. From everyone I talked to and what I read replace both pumps at the same time. Got the parts from Sonnen in Cali, labor done at The German Shoppe in Denver (awsome Indy).
http://www.renntech.org/forums/topic/43958-fuel-system-upgrade/ Same question, probably same guy at Sonnen... still looking for a solid answer, I am replacing both just to be safe but would like to know more about this "update" such as years affected ect... Thanks!
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 in for a few days. Thanks!