V reg 406 Estate. Fuel pipe return going up under back seat to pump. This has been rubbing on the bodywork quite happily for 6 years or so & finally broke through on our 170 mile journey to holiday. Nice one. Caused huge hassle/upset/loss of fuel. Obviously could have been quite nasty. Luckily only leaked when pump was running. The pipe is reasonably well hidden, but belongs to a section that joins at base of tank/return inlet/ carbon filter. Peugeot dont stock it directly, but will sell a length of new hose & a pair of clips for about £3 Check yours soon...