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so u dont know eh? anyboday any clue? its on a P1 with Decat if that helps... i only got the car today... and noticed it after. its buggin me cos i dont know what it does/did
It was just a guess. I thought it also might be a redundant exhaust gas sensor seeing as you've got a decat, or perhaps part of a "Tracker" type security system. Plucking at straws, I'm afraid, as my MY00 Turbo is locked-up for the night, & I can't crawl under it to compare until tommorrow.
Not really in the right place to be related to the fuel tank. There's not much other than gearbox/propshaft/shift linkage under that section of the car.
Following that pipe to its origin would no doubt throw a lot of light Jag, as would a close-up of whatever's on the end.