Bad Oxygen Sensor B2 S1 :(

Well vag com is trowing me the following codes:

17538 - Fuel Trim; Bank 2 (Mult): System too Lean
P1130 - 35-00 - -
17536 - Fuel Trim; Bank 1 (Mult): System too Lean
P1128 - 35-00 - -
17539 - Oxygen (Lambda) Sensor; B2 S1: Internal Resistance too High
P1131 - 35-10 - - - Intermittent
17549 - Load Calculation Cross Check: Implausible Value
P1141 - 35-10 - - - Intermittent

And I have like 15.7 lt/100km like 6.5km/lt so on friday I bought the O2 sensor Bosch 0258003813, tomorrow I'm going to install it, the engine its pretty tight as you can see in the below photo so wish me luck...