Ya its the ventalation hose. Im not sure what size the passenger side tanks hose is im assuming its the same it looks like it. Luckly it was a easy job hose come off and the new one went on in like 10minutes after hours of going from parts store to parts store and then finnaly the dealer. I swear those guys at the parts store where lost when i asked for the filler hose they where like is that for the radiator.lol And when i got to the dealer i didnt even get those part on the counter to show him and he knew right away what it was and where the part was. Its nice to have that kind of service.