Well my Bank 1 sensor 1 on the W12 failed and caused the cell to come on emmissions below threshold ect so i changed the sensor and it took me all of about 10 mins to do so hears how i did it.
first off remove the maf sensor followed by the air box it should look like this by now ...
Next i used a pair of plumbers grips to loosen off the sensor .. then unclip it and remove .. like this
and then the new sensor
now reverse the procedure ... and bingo .. no more cell light and better mpg again
hope its help full to people who are scared of tackeling the W12 themselves .... its not such a scary beast
