Fuel leak above rear subframe

[Robbie24]

Looking for some advice. I have just bought a legacy boxer estate but have discovered a fuel leak that appears to be coming from a unit above rear subframe. 

Question 1. What is small cylindrical unit?

Question 2. Is there any way I can access this area without having to lower whole subframe?

 

Any advice is very appreciated as expecting BIG garage bill otherwise

Robbie 

[Tidgy]

have a nosey here,

 

http://opposedforces.com/parts/legacy/us_b11/type_24/intake_and_supply_system_turbocharger/