Hi,
The oxygen sensor (at the exhaust with me) went almost exactly a year ago. It's a 55 plate 1.2 S. I didn’t get charged anything, I had to write a letter to Nissan to complain about my local garage because they couldn’t find the fault and couldn’t give a toss.
Nissan gave them a rocket and our local Nissan dealer apologised to us and did it all for free 
I think I made a post about this a year ago. Something about kangaroo jumps.
